How do we extract an m*n matrix from a larger p*q matrix?

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Chandvi Arora
Chandvi Arora 2017년 7월 20일
댓글: Chandvi Arora 2017년 7월 20일
I have an image which is divided into 8*8 blocks grid. I am finding DCT of each block in this image using blocproc which is followed by idct. This gives me idct of the entire image(a matrix of 512*512 is obtained). How do I extract dct of one block(i.e. dct of a single block out of 512*512 blocks) to obtain a 8*8 matrix out of 512*512 one.
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Rik
Rik 2017년 7월 20일
With block=total(1:8,1:8);?
Chandvi Arora
Chandvi Arora 2017년 7월 20일
I am able to do what I want with this. Thanks a lot.

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답변 (1개)

KSSV
KSSV 2017년 7월 20일
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Chandvi Arora
Chandvi Arora 2017년 7월 20일
In the last link, how to determine the value of [20x6x3 double]? I need the exact value.

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