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42 lines
1.3 KiB
42 lines
1.3 KiB
3 years ago
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# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This code is based on https://github.com/uoguelph-mlrg/Cutout
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import numpy as np
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import random
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class Cutout(object):
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def __init__(self, n_holes=1, length=112):
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self.n_holes = n_holes
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self.length = length
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def __call__(self, img):
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""" cutout_image """
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h, w = img.shape[:2]
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mask = np.ones((h, w), np.float32)
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for n in range(self.n_holes):
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y = np.random.randint(h)
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x = np.random.randint(w)
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y1 = np.clip(y - self.length // 2, 0, h)
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y2 = np.clip(y + self.length // 2, 0, h)
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x1 = np.clip(x - self.length // 2, 0, w)
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x2 = np.clip(x + self.length // 2, 0, w)
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img[y1:y2, x1:x2] = 0
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return img
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