Created
November 2, 2020 05:56
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crop white background of an image
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| def crop_white(image: np.ndarray, value: int = 255) -> np.ndarray: | |
| assert image.shape[2] == 3 | |
| assert image.dtype == np.uint8 | |
| ys, = (image.min((1, 2)) < value).nonzero() | |
| xs, = (image.min(0).min(1) < value).nonzero() | |
| if len(xs) == 0 or len(ys) == 0: | |
| return image | |
| return image[ys.min():ys.max() + 1, xs.min():xs.max() + 1] |
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