mirror of
https://github.com/PaddlePaddle/PaddleOCR.git
synced 2025-06-03 21:53:39 +08:00
72 lines
2.2 KiB
Python
72 lines
2.2 KiB
Python
|
# -*- coding: utf-8 -*-
|
||
|
|
# @Time : 2019/12/4 18:06
|
||
|
|
# @Author : zhoujun
|
||
|
|
import numpy as np
|
||
|
|
import imgaug
|
||
|
|
import imgaug.augmenters as iaa
|
||
|
|
|
||
|
|
|
||
|
|
class AugmenterBuilder(object):
|
||
|
|
def __init__(self):
|
||
|
|
pass
|
||
|
|
|
||
|
|
def build(self, args, root=True):
|
||
|
|
if args is None or len(args) == 0:
|
||
|
|
return None
|
||
|
|
elif isinstance(args, list):
|
||
|
|
if root:
|
||
|
|
sequence = [self.build(value, root=False) for value in args]
|
||
|
|
return iaa.Sequential(sequence)
|
||
|
|
else:
|
||
|
|
return getattr(
|
||
|
|
iaa,
|
||
|
|
args[0])(* [self.to_tuple_if_list(a) for a in args[1:]])
|
||
|
|
elif isinstance(args, dict):
|
||
|
|
cls = getattr(iaa, args['type'])
|
||
|
|
return cls(**{
|
||
|
|
k: self.to_tuple_if_list(v)
|
||
|
|
for k, v in args['args'].items()
|
||
|
|
})
|
||
|
|
else:
|
||
|
|
raise RuntimeError('unknown augmenter arg: ' + str(args))
|
||
|
|
|
||
|
|
def to_tuple_if_list(self, obj):
|
||
|
|
if isinstance(obj, list):
|
||
|
|
return tuple(obj)
|
||
|
|
return obj
|
||
|
|
|
||
|
|
|
||
|
|
class IaaAugment():
|
||
|
|
def __init__(self, augmenter_args):
|
||
|
|
self.augmenter_args = augmenter_args
|
||
|
|
self.augmenter = AugmenterBuilder().build(self.augmenter_args)
|
||
|
|
|
||
|
|
def __call__(self, data):
|
||
|
|
image = data['img']
|
||
|
|
shape = image.shape
|
||
|
|
|
||
|
|
if self.augmenter:
|
||
|
|
aug = self.augmenter.to_deterministic()
|
||
|
|
data['img'] = aug.augment_image(image)
|
||
|
|
data = self.may_augment_annotation(aug, data, shape)
|
||
|
|
return data
|
||
|
|
|
||
|
|
def may_augment_annotation(self, aug, data, shape):
|
||
|
|
if aug is None:
|
||
|
|
return data
|
||
|
|
|
||
|
|
line_polys = []
|
||
|
|
for poly in data['text_polys']:
|
||
|
|
new_poly = self.may_augment_poly(aug, shape, poly)
|
||
|
|
line_polys.append(new_poly)
|
||
|
|
data['text_polys'] = np.array(line_polys)
|
||
|
|
return data
|
||
|
|
|
||
|
|
def may_augment_poly(self, aug, img_shape, poly):
|
||
|
|
keypoints = [imgaug.Keypoint(p[0], p[1]) for p in poly]
|
||
|
|
keypoints = aug.augment_keypoints(
|
||
|
|
[imgaug.KeypointsOnImage(
|
||
|
|
keypoints, shape=img_shape)])[0].keypoints
|
||
|
|
poly = [(p.x, p.y) for p in keypoints]
|
||
|
|
return poly
|