cutout.py 1.3 KB

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  1. # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
  2. #
  3. # Licensed under the Apache License, Version 2.0 (the "License");
  4. # you may not use this file except in compliance with the License.
  5. # You may obtain a copy of the License at
  6. #
  7. # http://www.apache.org/licenses/LICENSE-2.0
  8. #
  9. # Unless required by applicable law or agreed to in writing, software
  10. # distributed under the License is distributed on an "AS IS" BASIS,
  11. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12. # See the License for the specific language governing permissions and
  13. # limitations under the License.
  14. # This code is based on https://github.com/uoguelph-mlrg/Cutout
  15. import numpy as np
  16. import random
  17. class Cutout(object):
  18. def __init__(self, n_holes=1, length=112):
  19. self.n_holes = n_holes
  20. self.length = length
  21. def __call__(self, img):
  22. """ cutout_image """
  23. h, w = img.shape[:2]
  24. mask = np.ones((h, w), np.float32)
  25. for n in range(self.n_holes):
  26. y = np.random.randint(h)
  27. x = np.random.randint(w)
  28. y1 = np.clip(y - self.length // 2, 0, h)
  29. y2 = np.clip(y + self.length // 2, 0, h)
  30. x1 = np.clip(x - self.length // 2, 0, w)
  31. x2 = np.clip(x + self.length // 2, 0, w)
  32. img[y1:y2, x1:x2] = 0
  33. return img