matlab - how to find lowest vertical and horizontal DCT coefficient of an image block -


i have image of size 256x256 , divided equal non overlapping blocks of size 8x8. have find lowest vertical , horizontal dct (discrete cosine transform)coefficients of each image block. there method available problem in matlab?

the usual method create array of indices maps important least important have stored them.

enter image description here

this pattern used in jpeg. don't know how have arranged coefficients cannot give ordering.


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