dct quantisation on image

1 view (last 30 days)
vaishali
vaishali on 6 Nov 2014
Answered: SRI on 6 Nov 2014
Hello
I am writing code for dct image steganography. There I have divided the cover image into 8*8 block. later I subtracted 128 from each pixel value. Then how to apply quantization on each block?
thanks in advance

Sign in to answer this question.

Answers (1)

SRI
SRI on 6 Nov 2014
Hi Vaishali
Now go through the command blkproc(which is nothing but a block processing) just apply the 8x8 matrix into this block

Categories

Find more on Encryption / Cryptography in Help Center and File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!