中文说明：多种图像增强方法，效果都挺好的的。包括dct，灰度变换，直方图均匀化，图像锐化
English Description：
A variety of image enhancement methods, the effect is very good. Including DCT, gray transformation, histogram equalization, image sharpening
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中文说明：多种图像增强方法，效果都挺好的的。包括dct，灰度变换，直方图均匀化，图像锐化
English Description：
A variety of image enhancement methods, the effect is very good. Including DCT, gray transformation, histogram equalization, image sharpening