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<a href="https://github.com/PaddlePaddle/PaddleOCR/edit/main/docs/algorithm/add_new_algorithm.md" title="编辑此页" class="md-content__button md-icon">
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<h1 id="_1">添加新算法<a class="headerlink" href="#_1" title="Permanent link">¶</a></h1>
<p>PaddleOCR将一个算法分解为以下几个部分，并对各部分进行模块化处理，方便快速组合出新的算法。</p>
<p>下面将分别对每个部分进行介绍，并介绍如何在该部分里添加新算法所需模块。</p>
<h2 id="1">1. 数据加载和处理<a class="headerlink" href="#1" title="Permanent link">¶</a></h2>
<p>数据加载和处理由不同的模块(module)组成，其完成了图片的读取、数据增强和label的制作。这一部分在<a href="../../ppocr/data">ppocr/data</a>下。 各个文件及文件夹作用说明如下:</p>
<div class="language-bash highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-0-1">1</a></span>
<span class="normal"><a href="#__codelineno-0-2">2</a></span>
<span class="normal"><a href="#__codelineno-0-3">3</a></span>
<span class="normal"><a href="#__codelineno-0-4">4</a></span>
<span class="normal"><a href="#__codelineno-0-5">5</a></span>
<span class="normal"><a href="#__codelineno-0-6">6</a></span>
<span class="normal"><a href="#__codelineno-0-7">7</a></span>
<span class="normal"><a href="#__codelineno-0-8">8</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1"></a>ppocr/data/
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2"></a>├──<span class="w"> </span>imaug<span class="w"> </span><span class="c1"># 图片的读取、数据增强和label制作相关的文件</span>
</span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3"></a>│<span class="w"> </span>├──<span class="w"> </span>label_ops.py<span class="w"> </span><span class="c1"># 对label进行变换的modules</span>
</span><span id="__span-0-4"><a id="__codelineno-0-4" name="__codelineno-0-4"></a>│<span class="w"> </span>├──<span class="w"> </span>operators.py<span class="w"> </span><span class="c1"># 对image进行变换的modules</span>
</span><span id="__span-0-5"><a id="__codelineno-0-5" name="__codelineno-0-5"></a>│<span class="w"> </span>├──.....
</span><span id="__span-0-6"><a id="__codelineno-0-6" name="__codelineno-0-6"></a>├──<span class="w"> </span>__init__.py
</span><span id="__span-0-7"><a id="__codelineno-0-7" name="__codelineno-0-7"></a>├──<span class="w"> </span>lmdb_dataset.py<span class="w"> </span><span class="c1"># 读取lmdb的数据集的dataset</span>
</span><span id="__span-0-8"><a id="__codelineno-0-8" name="__codelineno-0-8"></a>└──<span class="w"> </span>simple_dataset.py<span class="w"> </span><span class="c1"># 读取以`image_path\tgt`形式保存的数据集的dataset</span>
</span></code></pre></div></td></tr></table></div>
<p>PaddleOCR内置了大量图像操作相关模块，对于没有没有内置的模块可通过如下步骤添加:</p>
<ol>
<li>在 <a href="../../ppocr/data/imaug">ppocr/data/imaug</a> 文件夹下新建文件，如my_module.py。</li>
<li>
<p>在 my_module.py 文件内添加相关代码，示例代码如下:</p>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-1-1"> 1</a></span>
<span class="normal"><a href="#__codelineno-1-2"> 2</a></span>
<span class="normal"><a href="#__codelineno-1-3"> 3</a></span>
<span class="normal"><a href="#__codelineno-1-4"> 4</a></span>
<span class="normal"><a href="#__codelineno-1-5"> 5</a></span>
<span class="normal"><a href="#__codelineno-1-6"> 6</a></span>
<span class="normal"><a href="#__codelineno-1-7"> 7</a></span>
<span class="normal"><a href="#__codelineno-1-8"> 8</a></span>
<span class="normal"><a href="#__codelineno-1-9"> 9</a></span>
<span class="normal"><a href="#__codelineno-1-10">10</a></span>
<span class="normal"><a href="#__codelineno-1-11">11</a></span>
<span class="normal"><a href="#__codelineno-1-12">12</a></span>
<span class="normal"><a href="#__codelineno-1-13">13</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-1-1"><a id="__codelineno-1-1" name="__codelineno-1-1"></a><span class="k">class</span> <span class="nc">MyModule</span><span class="p">:</span>
</span><span id="__span-1-2"><a id="__codelineno-1-2" name="__codelineno-1-2"></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
</span><span id="__span-1-3"><a id="__codelineno-1-3" name="__codelineno-1-3"></a> <span class="c1"># your init code</span>
</span><span id="__span-1-4"><a id="__codelineno-1-4" name="__codelineno-1-4"></a> <span class="k">pass</span>
</span><span id="__span-1-5"><a id="__codelineno-1-5" name="__codelineno-1-5"></a>
</span><span id="__span-1-6"><a id="__codelineno-1-6" name="__codelineno-1-6"></a> <span class="k">def</span> <span class="fm">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span>
</span><span id="__span-1-7"><a id="__codelineno-1-7" name="__codelineno-1-7"></a> <span class="n">img</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="s1">'image'</span><span class="p">]</span>
</span><span id="__span-1-8"><a id="__codelineno-1-8" name="__codelineno-1-8"></a> <span class="n">label</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="s1">'label'</span><span class="p">]</span>
</span><span id="__span-1-9"><a id="__codelineno-1-9" name="__codelineno-1-9"></a> <span class="c1"># your process code</span>
</span><span id="__span-1-10"><a id="__codelineno-1-10" name="__codelineno-1-10"></a>
</span><span id="__span-1-11"><a id="__codelineno-1-11" name="__codelineno-1-11"></a> <span class="n">data</span><span class="p">[</span><span class="s1">'image'</span><span class="p">]</span> <span class="o">=</span> <span class="n">img</span>
</span><span id="__span-1-12"><a id="__codelineno-1-12" name="__codelineno-1-12"></a> <span class="n">data</span><span class="p">[</span><span class="s1">'label'</span><span class="p">]</span> <span class="o">=</span> <span class="n">label</span>
</span><span id="__span-1-13"><a id="__codelineno-1-13" name="__codelineno-1-13"></a> <span class="k">return</span> <span class="n">data</span>
</span></code></pre></div></td></tr></table></div>
</li>
<li>
<p>在 <a href="../../ppocr/data/imaug/__init__.py">ppocr/data/imaug/_<em>init_</em>.py</a> 文件内导入添加的模块。</p>
</li>
</ol>
<p>数据处理的所有处理步骤由不同的模块顺序执行而成，在config文件中按照列表的形式组合并执行。如:</p>
<div class="language-yaml highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-2-1"> 1</a></span>
<span class="normal"><a href="#__codelineno-2-2"> 2</a></span>
<span class="normal"><a href="#__codelineno-2-3"> 3</a></span>
<span class="normal"><a href="#__codelineno-2-4"> 4</a></span>
<span class="normal"><a href="#__codelineno-2-5"> 5</a></span>
<span class="normal"><a href="#__codelineno-2-6"> 6</a></span>
<span class="normal"><a href="#__codelineno-2-7"> 7</a></span>
<span class="normal"><a href="#__codelineno-2-8"> 8</a></span>
<span class="normal"><a href="#__codelineno-2-9"> 9</a></span>
<span class="normal"><a href="#__codelineno-2-10">10</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-2-1"><a id="__codelineno-2-1" name="__codelineno-2-1"></a><span class="c1"># angle class data process</span>
</span><span id="__span-2-2"><a id="__codelineno-2-2" name="__codelineno-2-2"></a><span class="nt">transforms</span><span class="p">:</span>
</span><span id="__span-2-3"><a id="__codelineno-2-3" name="__codelineno-2-3"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">DecodeImage</span><span class="p">:</span><span class="w"> </span><span class="c1"># load image</span>
</span><span id="__span-2-4"><a id="__codelineno-2-4" name="__codelineno-2-4"></a><span class="w"> </span><span class="nt">img_mode</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">BGR</span>
</span><span id="__span-2-5"><a id="__codelineno-2-5" name="__codelineno-2-5"></a><span class="w"> </span><span class="nt">channel_first</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">False</span>
</span><span id="__span-2-6"><a id="__codelineno-2-6" name="__codelineno-2-6"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">MyModule</span><span class="p">:</span>
</span><span id="__span-2-7"><a id="__codelineno-2-7" name="__codelineno-2-7"></a><span class="w"> </span><span class="nt">args1</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args1</span>
</span><span id="__span-2-8"><a id="__codelineno-2-8" name="__codelineno-2-8"></a><span class="w"> </span><span class="nt">args2</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args2</span>
</span><span id="__span-2-9"><a id="__codelineno-2-9" name="__codelineno-2-9"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">KeepKeys</span><span class="p">:</span>
</span><span id="__span-2-10"><a id="__codelineno-2-10" name="__codelineno-2-10"></a><span class="w"> </span><span class="nt">keep_keys</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="w"> </span><span class="s">'image'</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">'label'</span><span class="w"> </span><span class="p p-Indicator">]</span><span class="w"> </span><span class="c1"># dataloader will return list in this order</span>
</span></code></pre></div></td></tr></table></div>
<h2 id="2">2. 网络<a class="headerlink" href="#2" title="Permanent link">¶</a></h2>
<p>网络部分完成了网络的组网操作，PaddleOCR将网络划分为四部分，这一部分在<a href="../../ppocr/modeling">ppocr/modeling</a>下。 进入网络的数据将按照顺序(transforms->backbones->
necks->heads)依次通过这四个部分。</p>
<div class="language-bash highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-3-1">1</a></span>
<span class="normal"><a href="#__codelineno-3-2">2</a></span>
<span class="normal"><a href="#__codelineno-3-3">3</a></span>
<span class="normal"><a href="#__codelineno-3-4">4</a></span>
<span class="normal"><a href="#__codelineno-3-5">5</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-3-1"><a id="__codelineno-3-1" name="__codelineno-3-1"></a>├──<span class="w"> </span>architectures<span class="w"> </span><span class="c1"># 网络的组网代码</span>
</span><span id="__span-3-2"><a id="__codelineno-3-2" name="__codelineno-3-2"></a>├──<span class="w"> </span>transforms<span class="w"> </span><span class="c1"># 网络的图像变换模块</span>
</span><span id="__span-3-3"><a id="__codelineno-3-3" name="__codelineno-3-3"></a>├──<span class="w"> </span>backbones<span class="w"> </span><span class="c1"># 网络的特征提取模块</span>
</span><span id="__span-3-4"><a id="__codelineno-3-4" name="__codelineno-3-4"></a>├──<span class="w"> </span>necks<span class="w"> </span><span class="c1"># 网络的特征增强模块</span>
</span><span id="__span-3-5"><a id="__codelineno-3-5" name="__codelineno-3-5"></a>└──<span class="w"> </span>heads<span class="w"> </span><span class="c1"># 网络的输出模块</span>
</span></code></pre></div></td></tr></table></div>
<p>PaddleOCR内置了DB,EAST,SAST,CRNN和Attention等算法相关的常用模块，对于没有内置的模块可通过如下步骤添加，四个部分添加步骤一致，以backbones为例:</p>
<ol>
<li>在 <a href="../../ppocr/modeling/backbones">ppocr/modeling/backbones</a> 文件夹下新建文件，如my_backbone.py。</li>
<li>
<p>在 my_backbone.py 文件内添加相关代码，示例代码如下:</p>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-4-1"> 1</a></span>
<span class="normal"><a href="#__codelineno-4-2"> 2</a></span>
<span class="normal"><a href="#__codelineno-4-3"> 3</a></span>
<span class="normal"><a href="#__codelineno-4-4"> 4</a></span>
<span class="normal"><a href="#__codelineno-4-5"> 5</a></span>
<span class="normal"><a href="#__codelineno-4-6"> 6</a></span>
<span class="normal"><a href="#__codelineno-4-7"> 7</a></span>
<span class="normal"><a href="#__codelineno-4-8"> 8</a></span>
<span class="normal"><a href="#__codelineno-4-9"> 9</a></span>
<span class="normal"><a href="#__codelineno-4-10">10</a></span>
<span class="normal"><a href="#__codelineno-4-11">11</a></span>
<span class="normal"><a href="#__codelineno-4-12">12</a></span>
<span class="normal"><a href="#__codelineno-4-13">13</a></span>
<span class="normal"><a href="#__codelineno-4-14">14</a></span>
<span class="normal"><a href="#__codelineno-4-15">15</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-4-1"><a id="__codelineno-4-1" name="__codelineno-4-1"></a><span class="kn">import</span> <span class="nn">paddle</span>
</span><span id="__span-4-2"><a id="__codelineno-4-2" name="__codelineno-4-2"></a><span class="kn">import</span> <span class="nn">paddle.nn</span> <span class="k">as</span> <span class="nn">nn</span>
</span><span id="__span-4-3"><a id="__codelineno-4-3" name="__codelineno-4-3"></a><span class="kn">import</span> <span class="nn">paddle.nn.functional</span> <span class="k">as</span> <span class="nn">F</span>
</span><span id="__span-4-4"><a id="__codelineno-4-4" name="__codelineno-4-4"></a>
</span><span id="__span-4-5"><a id="__codelineno-4-5" name="__codelineno-4-5"></a>
</span><span id="__span-4-6"><a id="__codelineno-4-6" name="__codelineno-4-6"></a><span class="k">class</span> <span class="nc">MyBackbone</span><span class="p">(</span><span class="n">nn</span><span class="o">.</span><span class="n">Layer</span><span class="p">):</span>
</span><span id="__span-4-7"><a id="__codelineno-4-7" name="__codelineno-4-7"></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
</span><span id="__span-4-8"><a id="__codelineno-4-8" name="__codelineno-4-8"></a> <span class="nb">super</span><span class="p">(</span><span class="n">MyBackbone</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span>
</span><span id="__span-4-9"><a id="__codelineno-4-9" name="__codelineno-4-9"></a> <span class="c1"># your init code</span>
</span><span id="__span-4-10"><a id="__codelineno-4-10" name="__codelineno-4-10"></a> <span class="bp">self</span><span class="o">.</span><span class="n">conv</span> <span class="o">=</span> <span class="n">nn</span><span class="o">.</span><span class="n">xxxx</span>
</span><span id="__span-4-11"><a id="__codelineno-4-11" name="__codelineno-4-11"></a>
</span><span id="__span-4-12"><a id="__codelineno-4-12" name="__codelineno-4-12"></a> <span class="k">def</span> <span class="nf">forward</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inputs</span><span class="p">):</span>
</span><span id="__span-4-13"><a id="__codelineno-4-13" name="__codelineno-4-13"></a> <span class="c1"># your network forward</span>
</span><span id="__span-4-14"><a id="__codelineno-4-14" name="__codelineno-4-14"></a> <span class="n">y</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">conv</span><span class="p">(</span><span class="n">inputs</span><span class="p">)</span>
</span><span id="__span-4-15"><a id="__codelineno-4-15" name="__codelineno-4-15"></a> <span class="k">return</span> <span class="n">y</span>
</span></code></pre></div></td></tr></table></div>
</li>
<li>
<p>在 <a href="../../ppocr/modeling/backbones/__init__.py">ppocr/modeling/backbones/_<em>init_</em>.py</a>文件内导入添加的模块。</p>
</li>
</ol>
<p>在完成网络的四部分模块添加之后，只需要配置文件中进行配置即可使用，如:</p>
<div class="language-yaml highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-5-1"> 1</a></span>
<span class="normal"><a href="#__codelineno-5-2"> 2</a></span>
<span class="normal"><a href="#__codelineno-5-3"> 3</a></span>
<span class="normal"><a href="#__codelineno-5-4"> 4</a></span>
<span class="normal"><a href="#__codelineno-5-5"> 5</a></span>
<span class="normal"><a href="#__codelineno-5-6"> 6</a></span>
<span class="normal"><a href="#__codelineno-5-7"> 7</a></span>
<span class="normal"><a href="#__codelineno-5-8"> 8</a></span>
<span class="normal"><a href="#__codelineno-5-9"> 9</a></span>
<span class="normal"><a href="#__codelineno-5-10">10</a></span>
<span class="normal"><a href="#__codelineno-5-11">11</a></span>
<span class="normal"><a href="#__codelineno-5-12">12</a></span>
<span class="normal"><a href="#__codelineno-5-13">13</a></span>
<span class="normal"><a href="#__codelineno-5-14">14</a></span>
<span class="normal"><a href="#__codelineno-5-15">15</a></span>
<span class="normal"><a href="#__codelineno-5-16">16</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-5-1"><a id="__codelineno-5-1" name="__codelineno-5-1"></a><span class="nt">Architecture</span><span class="p">:</span>
</span><span id="__span-5-2"><a id="__codelineno-5-2" name="__codelineno-5-2"></a><span class="w"> </span><span class="nt">model_type</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">rec</span>
</span><span id="__span-5-3"><a id="__codelineno-5-3" name="__codelineno-5-3"></a><span class="w"> </span><span class="nt">algorithm</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">CRNN</span>
</span><span id="__span-5-4"><a id="__codelineno-5-4" name="__codelineno-5-4"></a><span class="w"> </span><span class="nt">Transform</span><span class="p">:</span>
</span><span id="__span-5-5"><a id="__codelineno-5-5" name="__codelineno-5-5"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">MyTransform</span>
</span><span id="__span-5-6"><a id="__codelineno-5-6" name="__codelineno-5-6"></a><span class="w"> </span><span class="nt">args1</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args1</span>
</span><span id="__span-5-7"><a id="__codelineno-5-7" name="__codelineno-5-7"></a><span class="w"> </span><span class="nt">args2</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args2</span>
</span><span id="__span-5-8"><a id="__codelineno-5-8" name="__codelineno-5-8"></a><span class="w"> </span><span class="nt">Backbone</span><span class="p">:</span>
</span><span id="__span-5-9"><a id="__codelineno-5-9" name="__codelineno-5-9"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">MyBackbone</span>
</span><span id="__span-5-10"><a id="__codelineno-5-10" name="__codelineno-5-10"></a><span class="w"> </span><span class="nt">args1</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args1</span>
</span><span id="__span-5-11"><a id="__codelineno-5-11" name="__codelineno-5-11"></a><span class="w"> </span><span class="nt">Neck</span><span class="p">:</span>
</span><span id="__span-5-12"><a id="__codelineno-5-12" name="__codelineno-5-12"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">MyNeck</span>
</span><span id="__span-5-13"><a id="__codelineno-5-13" name="__codelineno-5-13"></a><span class="w"> </span><span class="nt">args1</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args1</span>
</span><span id="__span-5-14"><a id="__codelineno-5-14" name="__codelineno-5-14"></a><span class="w"> </span><span class="nt">Head</span><span class="p">:</span>
</span><span id="__span-5-15"><a id="__codelineno-5-15" name="__codelineno-5-15"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">MyHead</span>
</span><span id="__span-5-16"><a id="__codelineno-5-16" name="__codelineno-5-16"></a><span class="w"> </span><span class="nt">args1</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args1</span>
</span></code></pre></div></td></tr></table></div>
<h2 id="3">3. 后处理<a class="headerlink" href="#3" title="Permanent link">¶</a></h2>
<p>后处理实现解码网络输出获得文本框或者识别到的文字。这一部分在<a href="../../ppocr/postprocess">ppocr/postprocess</a>下。
PaddleOCR内置了DB,EAST,SAST,CRNN和Attention等算法相关的后处理模块，对于没有内置的组件可通过如下步骤添加:</p>
<ol>
<li>在 <a href="../../ppocr/postprocess">ppocr/postprocess</a> 文件夹下新建文件，如 my_postprocess.py。</li>
<li>
<p>在 my_postprocess.py 文件内添加相关代码，示例代码如下:</p>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-6-1"> 1</a></span>
<span class="normal"><a href="#__codelineno-6-2"> 2</a></span>
<span class="normal"><a href="#__codelineno-6-3"> 3</a></span>
<span class="normal"><a href="#__codelineno-6-4"> 4</a></span>
<span class="normal"><a href="#__codelineno-6-5"> 5</a></span>
<span class="normal"><a href="#__codelineno-6-6"> 6</a></span>
<span class="normal"><a href="#__codelineno-6-7"> 7</a></span>
<span class="normal"><a href="#__codelineno-6-8"> 8</a></span>
<span class="normal"><a href="#__codelineno-6-9"> 9</a></span>
<span class="normal"><a href="#__codelineno-6-10">10</a></span>
<span class="normal"><a href="#__codelineno-6-11">11</a></span>
<span class="normal"><a href="#__codelineno-6-12">12</a></span>
<span class="normal"><a href="#__codelineno-6-13">13</a></span>
<span class="normal"><a href="#__codelineno-6-14">14</a></span>
<span class="normal"><a href="#__codelineno-6-15">15</a></span>
<span class="normal"><a href="#__codelineno-6-16">16</a></span>
<span class="normal"><a href="#__codelineno-6-17">17</a></span>
<span class="normal"><a href="#__codelineno-6-18">18</a></span>
<span class="normal"><a href="#__codelineno-6-19">19</a></span>
<span class="normal"><a href="#__codelineno-6-20">20</a></span>
<span class="normal"><a href="#__codelineno-6-21">21</a></span>
<span class="normal"><a href="#__codelineno-6-22">22</a></span>
<span class="normal"><a href="#__codelineno-6-23">23</a></span>
<span class="normal"><a href="#__codelineno-6-24">24</a></span>
<span class="normal"><a href="#__codelineno-6-25">25</a></span>
<span class="normal"><a href="#__codelineno-6-26">26</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-6-1"><a id="__codelineno-6-1" name="__codelineno-6-1"></a><span class="kn">import</span> <span class="nn">paddle</span>
</span><span id="__span-6-2"><a id="__codelineno-6-2" name="__codelineno-6-2"></a>
</span><span id="__span-6-3"><a id="__codelineno-6-3" name="__codelineno-6-3"></a>
</span><span id="__span-6-4"><a id="__codelineno-6-4" name="__codelineno-6-4"></a><span class="k">class</span> <span class="nc">MyPostProcess</span><span class="p">:</span>
</span><span id="__span-6-5"><a id="__codelineno-6-5" name="__codelineno-6-5"></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
</span><span id="__span-6-6"><a id="__codelineno-6-6" name="__codelineno-6-6"></a> <span class="c1"># your init code</span>
</span><span id="__span-6-7"><a id="__codelineno-6-7" name="__codelineno-6-7"></a> <span class="k">pass</span>
</span><span id="__span-6-8"><a id="__codelineno-6-8" name="__codelineno-6-8"></a>
</span><span id="__span-6-9"><a id="__codelineno-6-9" name="__codelineno-6-9"></a> <span class="k">def</span> <span class="fm">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">preds</span><span class="p">,</span> <span class="n">label</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
</span><span id="__span-6-10"><a id="__codelineno-6-10" name="__codelineno-6-10"></a> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">preds</span><span class="p">,</span> <span class="n">paddle</span><span class="o">.</span><span class="n">Tensor</span><span class="p">):</span>
</span><span id="__span-6-11"><a id="__codelineno-6-11" name="__codelineno-6-11"></a> <span class="n">preds</span> <span class="o">=</span> <span class="n">preds</span><span class="o">.</span><span class="n">numpy</span><span class="p">()</span>
</span><span id="__span-6-12"><a id="__codelineno-6-12" name="__codelineno-6-12"></a> <span class="c1"># you preds decode code</span>
</span><span id="__span-6-13"><a id="__codelineno-6-13" name="__codelineno-6-13"></a> <span class="n">preds</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">decode_preds</span><span class="p">(</span><span class="n">preds</span><span class="p">)</span>
</span><span id="__span-6-14"><a id="__codelineno-6-14" name="__codelineno-6-14"></a> <span class="k">if</span> <span class="n">label</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-6-15"><a id="__codelineno-6-15" name="__codelineno-6-15"></a> <span class="k">return</span> <span class="n">preds</span>
</span><span id="__span-6-16"><a id="__codelineno-6-16" name="__codelineno-6-16"></a> <span class="c1"># you label decode code</span>
</span><span id="__span-6-17"><a id="__codelineno-6-17" name="__codelineno-6-17"></a> <span class="n">label</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">decode_label</span><span class="p">(</span><span class="n">label</span><span class="p">)</span>
</span><span id="__span-6-18"><a id="__codelineno-6-18" name="__codelineno-6-18"></a> <span class="k">return</span> <span class="n">preds</span><span class="p">,</span> <span class="n">label</span>
</span><span id="__span-6-19"><a id="__codelineno-6-19" name="__codelineno-6-19"></a>
</span><span id="__span-6-20"><a id="__codelineno-6-20" name="__codelineno-6-20"></a> <span class="k">def</span> <span class="nf">decode_preds</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">preds</span><span class="p">):</span>
</span><span id="__span-6-21"><a id="__codelineno-6-21" name="__codelineno-6-21"></a> <span class="c1"># you preds decode code</span>
</span><span id="__span-6-22"><a id="__codelineno-6-22" name="__codelineno-6-22"></a> <span class="k">pass</span>
</span><span id="__span-6-23"><a id="__codelineno-6-23" name="__codelineno-6-23"></a>
</span><span id="__span-6-24"><a id="__codelineno-6-24" name="__codelineno-6-24"></a> <span class="k">def</span> <span class="nf">decode_label</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">preds</span><span class="p">):</span>
</span><span id="__span-6-25"><a id="__codelineno-6-25" name="__codelineno-6-25"></a> <span class="c1"># you label decode code</span>
</span><span id="__span-6-26"><a id="__codelineno-6-26" name="__codelineno-6-26"></a> <span class="k">pass</span>
</span></code></pre></div></td></tr></table></div>
</li>
<li>
<p>在 <a href="../../ppocr/postprocess/__init__.py">ppocr/postprocess/_<em>init_</em>.py</a>文件内导入添加的模块。</p>
</li>
</ol>
<p>在后处理模块添加之后，只需要配置文件中进行配置即可使用，如:</p>
<div class="language-yaml highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-7-1">1</a></span>
<span class="normal"><a href="#__codelineno-7-2">2</a></span>
<span class="normal"><a href="#__codelineno-7-3">3</a></span>
<span class="normal"><a href="#__codelineno-7-4">4</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-7-1"><a id="__codelineno-7-1" name="__codelineno-7-1"></a><span class="nt">PostProcess</span><span class="p">:</span>
</span><span id="__span-7-2"><a id="__codelineno-7-2" name="__codelineno-7-2"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">MyPostProcess</span>
</span><span id="__span-7-3"><a id="__codelineno-7-3" name="__codelineno-7-3"></a><span class="w"> </span><span class="nt">args1</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args1</span>
</span><span id="__span-7-4"><a id="__codelineno-7-4" name="__codelineno-7-4"></a><span class="w"> </span><span class="nt">args2</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args2</span>
</span></code></pre></div></td></tr></table></div>
<h2 id="4">4. 损失函数<a class="headerlink" href="#4" title="Permanent link">¶</a></h2>
<p>损失函数用于计算网络输出和label之间的距离。这一部分在<a href="../../ppocr/losses">ppocr/losses</a>下。
PaddleOCR内置了DB,EAST,SAST,CRNN和Attention等算法相关的损失函数模块，对于没有内置的模块可通过如下步骤添加:</p>
<ol>
<li>在 <a href="../../ppocr/losses">ppocr/losses</a> 文件夹下新建文件，如 my_loss.py。</li>
<li>
<p>在 my_loss.py 文件内添加相关代码，示例代码如下:</p>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-8-1"> 1</a></span>
<span class="normal"><a href="#__codelineno-8-2"> 2</a></span>
<span class="normal"><a href="#__codelineno-8-3"> 3</a></span>
<span class="normal"><a href="#__codelineno-8-4"> 4</a></span>
<span class="normal"><a href="#__codelineno-8-5"> 5</a></span>
<span class="normal"><a href="#__codelineno-8-6"> 6</a></span>
<span class="normal"><a href="#__codelineno-8-7"> 7</a></span>
<span class="normal"><a href="#__codelineno-8-8"> 8</a></span>
<span class="normal"><a href="#__codelineno-8-9"> 9</a></span>
<span class="normal"><a href="#__codelineno-8-10">10</a></span>
<span class="normal"><a href="#__codelineno-8-11">11</a></span>
<span class="normal"><a href="#__codelineno-8-12">12</a></span>
<span class="normal"><a href="#__codelineno-8-13">13</a></span>
<span class="normal"><a href="#__codelineno-8-14">14</a></span>
<span class="normal"><a href="#__codelineno-8-15">15</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-8-1"><a id="__codelineno-8-1" name="__codelineno-8-1"></a><span class="kn">import</span> <span class="nn">paddle</span>
</span><span id="__span-8-2"><a id="__codelineno-8-2" name="__codelineno-8-2"></a><span class="kn">from</span> <span class="nn">paddle</span> <span class="kn">import</span> <span class="n">nn</span>
</span><span id="__span-8-3"><a id="__codelineno-8-3" name="__codelineno-8-3"></a>
</span><span id="__span-8-4"><a id="__codelineno-8-4" name="__codelineno-8-4"></a>
</span><span id="__span-8-5"><a id="__codelineno-8-5" name="__codelineno-8-5"></a><span class="k">class</span> <span class="nc">MyLoss</span><span class="p">(</span><span class="n">nn</span><span class="o">.</span><span class="n">Layer</span><span class="p">):</span>
</span><span id="__span-8-6"><a id="__codelineno-8-6" name="__codelineno-8-6"></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
</span><span id="__span-8-7"><a id="__codelineno-8-7" name="__codelineno-8-7"></a> <span class="nb">super</span><span class="p">(</span><span class="n">MyLoss</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span>
</span><span id="__span-8-8"><a id="__codelineno-8-8" name="__codelineno-8-8"></a> <span class="c1"># you init code</span>
</span><span id="__span-8-9"><a id="__codelineno-8-9" name="__codelineno-8-9"></a> <span class="k">pass</span>
</span><span id="__span-8-10"><a id="__codelineno-8-10" name="__codelineno-8-10"></a>
</span><span id="__span-8-11"><a id="__codelineno-8-11" name="__codelineno-8-11"></a> <span class="k">def</span> <span class="fm">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">predicts</span><span class="p">,</span> <span class="n">batch</span><span class="p">):</span>
</span><span id="__span-8-12"><a id="__codelineno-8-12" name="__codelineno-8-12"></a> <span class="n">label</span> <span class="o">=</span> <span class="n">batch</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
</span><span id="__span-8-13"><a id="__codelineno-8-13" name="__codelineno-8-13"></a> <span class="c1"># your loss code</span>
</span><span id="__span-8-14"><a id="__codelineno-8-14" name="__codelineno-8-14"></a> <span class="n">loss</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">loss</span><span class="p">(</span><span class="nb">input</span><span class="o">=</span><span class="n">predicts</span><span class="p">,</span> <span class="n">label</span><span class="o">=</span><span class="n">label</span><span class="p">)</span>
</span><span id="__span-8-15"><a id="__codelineno-8-15" name="__codelineno-8-15"></a> <span class="k">return</span> <span class="p">{</span><span class="s1">'loss'</span><span class="p">:</span> <span class="n">loss</span><span class="p">}</span>
</span></code></pre></div></td></tr></table></div>
</li>
<li>
<p>在 <a href="../../ppocr/losses/__init__.py">ppocr/losses/_<em>init_</em>.py</a>文件内导入添加的模块。</p>
</li>
</ol>
<p>在损失函数添加之后，只需要配置文件中进行配置即可使用，如:</p>
<div class="language-yaml highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-9-1">1</a></span>
<span class="normal"><a href="#__codelineno-9-2">2</a></span>
<span class="normal"><a href="#__codelineno-9-3">3</a></span>
<span class="normal"><a href="#__codelineno-9-4">4</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-9-1"><a id="__codelineno-9-1" name="__codelineno-9-1"></a><span class="nt">Loss</span><span class="p">:</span>
</span><span id="__span-9-2"><a id="__codelineno-9-2" name="__codelineno-9-2"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">MyLoss</span>
</span><span id="__span-9-3"><a id="__codelineno-9-3" name="__codelineno-9-3"></a><span class="w"> </span><span class="nt">args1</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args1</span>
</span><span id="__span-9-4"><a id="__codelineno-9-4" name="__codelineno-9-4"></a><span class="w"> </span><span class="nt">args2</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args2</span>
</span></code></pre></div></td></tr></table></div>
<h2 id="5">5. 指标评估<a class="headerlink" href="#5" title="Permanent link">¶</a></h2>
<p>指标评估用于计算网络在当前batch上的性能。这一部分在<a href="../../ppocr/metrics">ppocr/metrics</a>下。 PaddleOCR内置了检测，分类和识别等算法相关的指标评估模块，对于没有内置的模块可通过如下步骤添加:</p>
<ol>
<li>在 <a href="../../ppocr/metrics">ppocr/metrics</a> 文件夹下新建文件，如my_metric.py。</li>
<li>
<p>在 my_metric.py 文件内添加相关代码，示例代码如下:</p>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-10-1"> 1</a></span>
<span class="normal"><a href="#__codelineno-10-2"> 2</a></span>
<span class="normal"><a href="#__codelineno-10-3"> 3</a></span>
<span class="normal"><a href="#__codelineno-10-4"> 4</a></span>
<span class="normal"><a href="#__codelineno-10-5"> 5</a></span>
<span class="normal"><a href="#__codelineno-10-6"> 6</a></span>
<span class="normal"><a href="#__codelineno-10-7"> 7</a></span>
<span class="normal"><a href="#__codelineno-10-8"> 8</a></span>
<span class="normal"><a href="#__codelineno-10-9"> 9</a></span>
<span class="normal"><a href="#__codelineno-10-10">10</a></span>
<span class="normal"><a href="#__codelineno-10-11">11</a></span>
<span class="normal"><a href="#__codelineno-10-12">12</a></span>
<span class="normal"><a href="#__codelineno-10-13">13</a></span>
<span class="normal"><a href="#__codelineno-10-14">14</a></span>
<span class="normal"><a href="#__codelineno-10-15">15</a></span>
<span class="normal"><a href="#__codelineno-10-16">16</a></span>
<span class="normal"><a href="#__codelineno-10-17">17</a></span>
<span class="normal"><a href="#__codelineno-10-18">18</a></span>
<span class="normal"><a href="#__codelineno-10-19">19</a></span>
<span class="normal"><a href="#__codelineno-10-20">20</a></span>
<span class="normal"><a href="#__codelineno-10-21">21</a></span>
<span class="normal"><a href="#__codelineno-10-22">22</a></span>
<span class="normal"><a href="#__codelineno-10-23">23</a></span>
<span class="normal"><a href="#__codelineno-10-24">24</a></span>
<span class="normal"><a href="#__codelineno-10-25">25</a></span>
<span class="normal"><a href="#__codelineno-10-26">26</a></span>
<span class="normal"><a href="#__codelineno-10-27">27</a></span>
<span class="normal"><a href="#__codelineno-10-28">28</a></span>
<span class="normal"><a href="#__codelineno-10-29">29</a></span>
<span class="normal"><a href="#__codelineno-10-30">30</a></span>
<span class="normal"><a href="#__codelineno-10-31">31</a></span>
<span class="normal"><a href="#__codelineno-10-32">32</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-10-1"><a id="__codelineno-10-1" name="__codelineno-10-1"></a><span class="k">class</span> <span class="nc">MyMetric</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
</span><span id="__span-10-2"><a id="__codelineno-10-2" name="__codelineno-10-2"></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">main_indicator</span><span class="o">=</span><span class="s1">'acc'</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
</span><span id="__span-10-3"><a id="__codelineno-10-3" name="__codelineno-10-3"></a> <span class="c1"># main_indicator is used for select best model</span>
</span><span id="__span-10-4"><a id="__codelineno-10-4" name="__codelineno-10-4"></a> <span class="bp">self</span><span class="o">.</span><span class="n">main_indicator</span> <span class="o">=</span> <span class="n">main_indicator</span>
</span><span id="__span-10-5"><a id="__codelineno-10-5" name="__codelineno-10-5"></a> <span class="bp">self</span><span class="o">.</span><span class="n">reset</span><span class="p">()</span>
</span><span id="__span-10-6"><a id="__codelineno-10-6" name="__codelineno-10-6"></a>
</span><span id="__span-10-7"><a id="__codelineno-10-7" name="__codelineno-10-7"></a> <span class="k">def</span> <span class="fm">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">preds</span><span class="p">,</span> <span class="n">batch</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
</span><span id="__span-10-8"><a id="__codelineno-10-8" name="__codelineno-10-8"></a> <span class="c1"># preds is out of postprocess</span>
</span><span id="__span-10-9"><a id="__codelineno-10-9" name="__codelineno-10-9"></a> <span class="c1"># batch is out of dataloader</span>
</span><span id="__span-10-10"><a id="__codelineno-10-10" name="__codelineno-10-10"></a> <span class="n">labels</span> <span class="o">=</span> <span class="n">batch</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
</span><span id="__span-10-11"><a id="__codelineno-10-11" name="__codelineno-10-11"></a> <span class="n">cur_correct_num</span> <span class="o">=</span> <span class="mi">0</span>
</span><span id="__span-10-12"><a id="__codelineno-10-12" name="__codelineno-10-12"></a> <span class="n">cur_all_num</span> <span class="o">=</span> <span class="mi">0</span>
</span><span id="__span-10-13"><a id="__codelineno-10-13" name="__codelineno-10-13"></a> <span class="c1"># you metric code</span>
</span><span id="__span-10-14"><a id="__codelineno-10-14" name="__codelineno-10-14"></a> <span class="bp">self</span><span class="o">.</span><span class="n">correct_num</span> <span class="o">+=</span> <span class="n">cur_correct_num</span>
</span><span id="__span-10-15"><a id="__codelineno-10-15" name="__codelineno-10-15"></a> <span class="bp">self</span><span class="o">.</span><span class="n">all_num</span> <span class="o">+=</span> <span class="n">cur_all_num</span>
</span><span id="__span-10-16"><a id="__codelineno-10-16" name="__codelineno-10-16"></a> <span class="k">return</span> <span class="p">{</span><span class="s1">'acc'</span><span class="p">:</span> <span class="n">cur_correct_num</span> <span class="o">/</span> <span class="n">cur_all_num</span><span class="p">,</span> <span class="p">}</span>
</span><span id="__span-10-17"><a id="__codelineno-10-17" name="__codelineno-10-17"></a>
</span><span id="__span-10-18"><a id="__codelineno-10-18" name="__codelineno-10-18"></a> <span class="k">def</span> <span class="nf">get_metric</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
</span><span id="__span-10-19"><a id="__codelineno-10-19" name="__codelineno-10-19"></a><span class="w"> </span><span class="sd">"""</span>
</span><span id="__span-10-20"><a id="__codelineno-10-20" name="__codelineno-10-20"></a><span class="sd"> return metrics {</span>
</span><span id="__span-10-21"><a id="__codelineno-10-21" name="__codelineno-10-21"></a><span class="sd"> 'acc': 0,</span>
</span><span id="__span-10-22"><a id="__codelineno-10-22" name="__codelineno-10-22"></a><span class="sd"> 'norm_edit_dis': 0,</span>
</span><span id="__span-10-23"><a id="__codelineno-10-23" name="__codelineno-10-23"></a><span class="sd"> }</span>
</span><span id="__span-10-24"><a id="__codelineno-10-24" name="__codelineno-10-24"></a><span class="sd"> """</span>
</span><span id="__span-10-25"><a id="__codelineno-10-25" name="__codelineno-10-25"></a> <span class="n">acc</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">correct_num</span> <span class="o">/</span> <span class="bp">self</span><span class="o">.</span><span class="n">all_num</span>
</span><span id="__span-10-26"><a id="__codelineno-10-26" name="__codelineno-10-26"></a> <span class="bp">self</span><span class="o">.</span><span class="n">reset</span><span class="p">()</span>
</span><span id="__span-10-27"><a id="__codelineno-10-27" name="__codelineno-10-27"></a> <span class="k">return</span> <span class="p">{</span><span class="s1">'acc'</span><span class="p">:</span> <span class="n">acc</span><span class="p">}</span>
</span><span id="__span-10-28"><a id="__codelineno-10-28" name="__codelineno-10-28"></a>
</span><span id="__span-10-29"><a id="__codelineno-10-29" name="__codelineno-10-29"></a> <span class="k">def</span> <span class="nf">reset</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
</span><span id="__span-10-30"><a id="__codelineno-10-30" name="__codelineno-10-30"></a> <span class="c1"># reset metric</span>
</span><span id="__span-10-31"><a id="__codelineno-10-31" name="__codelineno-10-31"></a> <span class="bp">self</span><span class="o">.</span><span class="n">correct_num</span> <span class="o">=</span> <span class="mi">0</span>
</span><span id="__span-10-32"><a id="__codelineno-10-32" name="__codelineno-10-32"></a> <span class="bp">self</span><span class="o">.</span><span class="n">all_num</span> <span class="o">=</span> <span class="mi">0</span>
</span></code></pre></div></td></tr></table></div>
</li>
<li>
<p>在 <a href="../../ppocr/metrics/__init__.py">ppocr/metrics/_<em>init_</em>.py</a>文件内导入添加的模块。</p>
</li>
</ol>
<p>在指标评估模块添加之后，只需要配置文件中进行配置即可使用，如:</p>
<div class="language-yaml highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-11-1">1</a></span>
<span class="normal"><a href="#__codelineno-11-2">2</a></span>
<span class="normal"><a href="#__codelineno-11-3">3</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-11-1"><a id="__codelineno-11-1" name="__codelineno-11-1"></a><span class="nt">Metric</span><span class="p">:</span>
</span><span id="__span-11-2"><a id="__codelineno-11-2" name="__codelineno-11-2"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">MyMetric</span>
</span><span id="__span-11-3"><a id="__codelineno-11-3" name="__codelineno-11-3"></a><span class="w"> </span><span class="nt">main_indicator</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">acc</span>
</span></code></pre></div></td></tr></table></div>
<h2 id="6">6. 优化器<a class="headerlink" href="#6" title="Permanent link">¶</a></h2>
<p>优化器用于训练网络。优化器内部还包含了网络正则化和学习率衰减模块。 这一部分在<a href="../../ppocr/optimizer">ppocr/optimizer</a>下。 PaddleOCR内置了<code>Momentum</code>,<code>Adam</code>
和<code>RMSProp</code>等常用的优化器模块，<code>Linear</code>,<code>Cosine</code>,<code>Step</code>和<code>Piecewise</code>等常用的正则化模块与<code>L1Decay</code>和<code>L2Decay</code>等常用的学习率衰减模块。
对于没有内置的模块可通过如下步骤添加，以<code>optimizer</code>为例:</p>
<ol>
<li>
<p>在 <a href="../../ppocr/optimizer/optimizer.py">ppocr/optimizer/optimizer.py</a> 文件内创建自己的优化器，示例代码如下:</p>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-12-1"> 1</a></span>
<span class="normal"><a href="#__codelineno-12-2"> 2</a></span>
<span class="normal"><a href="#__codelineno-12-3"> 3</a></span>
<span class="normal"><a href="#__codelineno-12-4"> 4</a></span>
<span class="normal"><a href="#__codelineno-12-5"> 5</a></span>
<span class="normal"><a href="#__codelineno-12-6"> 6</a></span>
<span class="normal"><a href="#__codelineno-12-7"> 7</a></span>
<span class="normal"><a href="#__codelineno-12-8"> 8</a></span>
<span class="normal"><a href="#__codelineno-12-9"> 9</a></span>
<span class="normal"><a href="#__codelineno-12-10">10</a></span>
<span class="normal"><a href="#__codelineno-12-11">11</a></span>
<span class="normal"><a href="#__codelineno-12-12">12</a></span>
<span class="normal"><a href="#__codelineno-12-13">13</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-12-1"><a id="__codelineno-12-1" name="__codelineno-12-1"></a><span class="kn">from</span> <span class="nn">paddle</span> <span class="kn">import</span> <span class="n">optimizer</span> <span class="k">as</span> <span class="n">optim</span>
</span><span id="__span-12-2"><a id="__codelineno-12-2" name="__codelineno-12-2"></a>
</span><span id="__span-12-3"><a id="__codelineno-12-3" name="__codelineno-12-3"></a>
</span><span id="__span-12-4"><a id="__codelineno-12-4" name="__codelineno-12-4"></a><span class="k">class</span> <span class="nc">MyOptim</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
</span><span id="__span-12-5"><a id="__codelineno-12-5" name="__codelineno-12-5"></a> <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">learning_rate</span><span class="o">=</span><span class="mf">0.001</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
</span><span id="__span-12-6"><a id="__codelineno-12-6" name="__codelineno-12-6"></a> <span class="bp">self</span><span class="o">.</span><span class="n">learning_rate</span> <span class="o">=</span> <span class="n">learning_rate</span>
</span><span id="__span-12-7"><a id="__codelineno-12-7" name="__codelineno-12-7"></a>
</span><span id="__span-12-8"><a id="__codelineno-12-8" name="__codelineno-12-8"></a> <span class="k">def</span> <span class="fm">__call__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">parameters</span><span class="p">):</span>
</span><span id="__span-12-9"><a id="__codelineno-12-9" name="__codelineno-12-9"></a> <span class="c1"># It is recommended to wrap the built-in optimizer of paddle</span>
</span><span id="__span-12-10"><a id="__codelineno-12-10" name="__codelineno-12-10"></a> <span class="n">opt</span> <span class="o">=</span> <span class="n">optim</span><span class="o">.</span><span class="n">XXX</span><span class="p">(</span>
</span><span id="__span-12-11"><a id="__codelineno-12-11" name="__codelineno-12-11"></a> <span class="n">learning_rate</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">learning_rate</span><span class="p">,</span>
</span><span id="__span-12-12"><a id="__codelineno-12-12" name="__codelineno-12-12"></a> <span class="n">parameters</span><span class="o">=</span><span class="n">parameters</span><span class="p">)</span>
</span><span id="__span-12-13"><a id="__codelineno-12-13" name="__codelineno-12-13"></a> <span class="k">return</span> <span class="n">opt</span>
</span></code></pre></div></td></tr></table></div>
</li>
</ol>
<p>在优化器模块添加之后，只需要配置文件中进行配置即可使用，如:</p>
<div class="language-yaml highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-13-1"> 1</a></span>
<span class="normal"><a href="#__codelineno-13-2"> 2</a></span>
<span class="normal"><a href="#__codelineno-13-3"> 3</a></span>
<span class="normal"><a href="#__codelineno-13-4"> 4</a></span>
<span class="normal"><a href="#__codelineno-13-5"> 5</a></span>
<span class="normal"><a href="#__codelineno-13-6"> 6</a></span>
<span class="normal"><a href="#__codelineno-13-7"> 7</a></span>
<span class="normal"><a href="#__codelineno-13-8"> 8</a></span>
<span class="normal"><a href="#__codelineno-13-9"> 9</a></span>
<span class="normal"><a href="#__codelineno-13-10">10</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-13-1"><a id="__codelineno-13-1" name="__codelineno-13-1"></a><span class="nt">Optimizer</span><span class="p">:</span>
</span><span id="__span-13-2"><a id="__codelineno-13-2" name="__codelineno-13-2"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">MyOptim</span>
</span><span id="__span-13-3"><a id="__codelineno-13-3" name="__codelineno-13-3"></a><span class="w"> </span><span class="nt">args1</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args1</span>
</span><span id="__span-13-4"><a id="__codelineno-13-4" name="__codelineno-13-4"></a><span class="w"> </span><span class="nt">args2</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">args2</span>
</span><span id="__span-13-5"><a id="__codelineno-13-5" name="__codelineno-13-5"></a><span class="w"> </span><span class="nt">lr</span><span class="p">:</span>
</span><span id="__span-13-6"><a id="__codelineno-13-6" name="__codelineno-13-6"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">Cosine</span>
</span><span id="__span-13-7"><a id="__codelineno-13-7" name="__codelineno-13-7"></a><span class="w"> </span><span class="nt">learning_rate</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">0.001</span>
</span><span id="__span-13-8"><a id="__codelineno-13-8" name="__codelineno-13-8"></a><span class="w"> </span><span class="nt">regularizer</span><span class="p">:</span>
</span><span id="__span-13-9"><a id="__codelineno-13-9" name="__codelineno-13-9"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="s">'L2'</span>
</span><span id="__span-13-10"><a id="__codelineno-13-10" name="__codelineno-13-10"></a><span class="w"> </span><span class="nt">factor</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">0</span>
</span></code></pre></div></td></tr></table></div>
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