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图像余旋变换(Cosine Transformation)是一种频域变换,广泛应用于图像处理。本代码实现了图像Cos变换,非常经典,带图片可测试.-image rotation transform (Cosine Transformation) is a frequency-domain transform, widely used in image processing. Implementation of the code of the image Cos transform, very classic, with pictures can be tested.