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SimCLR/feature_eval/linear_feature_eval.ipynb

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{
"nbformat": 4,
"nbformat_minor": 0,
"metadata": {
"kernelspec": {
"display_name": "pytorch",
"language": "python",
"name": "pytorch"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.6.6"
},
"colab": {
"name": "linear_feature_eval.ipynb",
"provenance": [],
"include_colab_link": true
},
"accelerator": "GPU"
},
"cells": [
{
"cell_type": "markdown",
"metadata": {
"id": "view-in-github",
"colab_type": "text"
},
"source": [
"<a href=\"https://colab.research.google.com/github/sthalles/SimCLR/blob/master/feature_eval/linear_feature_eval.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
]
},
{
"cell_type": "code",
"metadata": {
"id": "WSgRE1CcLqdS",
"colab_type": "code",
"colab": {}
},
"source": [
"!pip install gdown"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "G7YMxsvEZMrX",
"colab_type": "code",
"colab": {}
},
"source": [
"folder_name = 'Mar14_05-52-52_thallessilva'\n",
"\n",
"# !gdown https://drive.google.com/uc?id=12kKgvo4h41G9qnDdhDnZXFlR5_aqvaVR # ResNet 18 --> 40 epochs trained\n",
"!gdown https://drive.google.com/uc?id=1LjuZ1RmhotrnugprRQc2Exk0EbQHMJhL # ResNet 18 --> 80 epochs trained\n",
"!unzip Mar14_05-52-52_thallessilva\n",
"!ls"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "vEoblAn6RsO7",
"colab_type": "code",
"colab": {}
},
"source": [
"# download and extract stl10\n",
"!wget http://ai.stanford.edu/~acoates/stl10/stl10_binary.tar.gz\n",
"!tar -zxvf stl10_binary.tar.gz\n",
"!ls"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "aFnFqIFLLjQZ",
"colab_type": "code",
"colab": {}
},
"source": [
"import torch\n",
"import sys\n",
"import numpy as np\n",
"import os\n",
"from sklearn.neighbors import KNeighborsClassifier\n",
"import yaml\n",
"import matplotlib.pyplot as plt\n",
"from sklearn.decomposition import PCA\n",
"from sklearn.linear_model import LogisticRegression\n",
"from sklearn import preprocessing\n",
"import importlib.util"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "lDfbL3w_Z0Od",
"colab_type": "code",
"colab": {}
},
"source": [
"device = 'cuda' if torch.cuda.is_available() else 'cpu'\n",
"print(\"Using device:\", device)"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "IQMIryc6LjQd",
"colab_type": "code",
"colab": {}
},
"source": [
"checkpoints_folder = os.path.join(folder_name, 'checkpoints')\n",
"config = yaml.load(open(os.path.join(checkpoints_folder, \"config.yaml\"), \"r\"))\n",
"config"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "GxuiXvAKLjQm",
"colab_type": "code",
"colab": {}
},
"source": [
"def _load_stl10(prefix=\"train\"):\n",
" X_train = np.fromfile('./stl10_binary/' + prefix + '_X.bin', dtype=np.uint8)\n",
" y_train = np.fromfile('./stl10_binary/' + prefix + '_y.bin', dtype=np.uint8)\n",
"\n",
" X_train = np.reshape(X_train, (-1, 3, 96, 96)) # CWH\n",
" X_train = np.transpose(X_train, (0, 1, 3, 2)) # CHW\n",
"\n",
" print(\"{} images\".format(prefix))\n",
" print(X_train.shape)\n",
" print(y_train.shape)\n",
" return X_train, y_train - 1"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "Xn0xslbELjQq",
"colab_type": "code",
"colab": {}
},
"source": [
"# load STL-10 train data\n",
"X_train, y_train = _load_stl10(\"train\")"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "7shAS6fvXtPG",
"colab_type": "code",
"colab": {}
},
"source": [
"fig, axs = plt.subplots(nrows=2, ncols=6, constrained_layout=False, figsize=(12,4))\n",
"\n",
"for i, ax in enumerate(axs.flat):\n",
" ax.imshow(X_train[i].transpose(1,2,0))\n",
"plt.show()"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "YUJ3_xoPLjQv",
"colab_type": "code",
"colab": {}
},
"source": [
"# load STL-10 test data\n",
"X_test, y_test = _load_stl10(\"test\")"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "markdown",
"metadata": {
"id": "QE8sEe_qLjQz",
"colab_type": "text"
},
"source": [
"## Test protocol #1 PCA features"
]
},
{
"cell_type": "code",
"metadata": {
"id": "WFmUZzKoLjQ4",
"colab_type": "code",
"colab": {}
},
"source": [
"scaler = preprocessing.StandardScaler()\n",
"scaler.fit(X_train.reshape((X_train.shape[0],-1)))\n",
"\n",
"pca = PCA(n_components=config['model']['out_dim'])\n",
"\n",
"X_train_pca = pca.fit_transform(scaler.transform(X_train.reshape(X_train.shape[0], -1)))\n",
"X_test_pca = pca.transform(scaler.transform(X_test.reshape(X_test.shape[0], -1)))\n",
"\n",
"print(\"PCA features\")\n",
"print(X_train_pca.shape)\n",
"print(X_test_pca.shape)"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "Yq2N_FpVLjQ8",
"colab_type": "code",
"colab": {}
},
"source": [
"def linear_model_eval(X_train, y_train, X_test, y_test):\n",
" \n",
" clf = LogisticRegression(random_state=0, max_iter=1200, solver='lbfgs', C=1.0)\n",
" clf.fit(X_train, y_train)\n",
" print(\"Logistic Regression feature eval\")\n",
" print(\"Train score:\", clf.score(X_train, y_train))\n",
" print(\"Test score:\", clf.score(X_test, y_test))\n",
" \n",
" print(\"-------------------------------\")\n",
" neigh = KNeighborsClassifier(n_neighbors=10)\n",
" neigh.fit(X_train, y_train)\n",
" print(\"KNN feature eval\")\n",
" print(\"Train score:\", neigh.score(X_train, y_train))\n",
" print(\"Test score:\", neigh.score(X_test, y_test))"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "6VTolghbLjRA",
"colab_type": "code",
"colab": {}
},
"source": [
"linear_model_eval(X_train_pca, y_train, X_test_pca, y_test)\n",
"\n",
"## clean up resources\n",
"del X_train_pca\n",
"del X_test_pca"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "markdown",
"metadata": {
"id": "5nf4rDtWLjRE",
"colab_type": "text"
},
"source": [
"## Protocol #2 Logisitc Regression"
]
},
{
"cell_type": "code",
"metadata": {
"id": "fYezlvoNVpeT",
"colab_type": "code",
"colab": {}
},
"source": [
"# Load the neural net module\n",
"spec = importlib.util.spec_from_file_location(\"model\", os.path.join(checkpoints_folder, 'resnet_simclr.py'))\n",
"resnet_module = importlib.util.module_from_spec(spec)\n",
"spec.loader.exec_module(resnet_module)"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "AxhfD0c7LjRF",
"colab_type": "code",
"colab": {}
},
"source": [
"model = resnet_module.ResNetSimCLR(**config['model'])\n",
"model.eval()\n",
"\n",
"state_dict = torch.load(os.path.join(checkpoints_folder, 'model.pth'), map_location=torch.device('cpu'))\n",
"model.load_state_dict(state_dict)\n",
"model = model.to(device)"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "ro6yG6ngLjRI",
"colab_type": "code",
"colab": {}
},
"source": [
"def next_batch(X, y, batch_size):\n",
" for i in range(0, X.shape[0], batch_size):\n",
" X_batch = torch.tensor(X[i: i+batch_size]) / 255.\n",
" y_batch = torch.tensor(y[i: i+batch_size])\n",
" yield X_batch.to(device), y_batch.to(device)"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "oftbHXcdLjRM",
"colab_type": "code",
"colab": {}
},
"source": [
"X_train_feature = []\n",
"\n",
"for batch_x, batch_y in next_batch(X_train, y_train, batch_size=config['batch_size']):\n",
" features, _ = model(batch_x)\n",
" X_train_feature.extend(features.cpu().detach().numpy())\n",
" \n",
"X_train_feature = np.array(X_train_feature)\n",
"\n",
"print(\"Train features\")\n",
"print(X_train_feature.shape)"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "sverVlKPLjRP",
"colab_type": "code",
"colab": {}
},
"source": [
"X_test_feature = []\n",
"\n",
"for batch_x, batch_y in next_batch(X_test, y_test, batch_size=config['batch_size']):\n",
" features, _ = model(batch_x)\n",
" X_test_feature.extend(features.cpu().detach().numpy())\n",
" \n",
"X_test_feature = np.array(X_test_feature)\n",
"\n",
"print(\"Test features\")\n",
"print(X_test_feature.shape)"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "91jHpRQyLjRT",
"colab_type": "code",
"colab": {}
},
"source": [
"scaler = preprocessing.StandardScaler()\n",
"scaler.fit(X_train_feature)\n",
"\n",
"linear_model_eval(scaler.transform(X_train_feature), y_train, scaler.transform(X_test_feature), y_test)\n",
"\n",
"del X_train_feature\n",
"del X_test_feature"
],
"execution_count": 0,
"outputs": []
},
{
"cell_type": "code",
"metadata": {
"id": "fXy_YX8_b7gL",
"colab_type": "code",
"colab": {}
},
"source": [
""
],
"execution_count": 0,
"outputs": []
}
]
}
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