matlab把图片像素进行DCT变换得到DCT系数

cactus1920*1080的第一帧图 1、对cactus1920*1080的第一帧图进行整个DCT变换 RGB = imread('Cactus_1920x1080_50_0_rgb.bmp'); I = rgb2gray(RGB); J = dct2(I); dlmwrite('test.txt', a); imshow(log(abs(J)),[]), colormap(jet(64)),

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