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In my problem, i have taken rgb image of size 512*512,then converted it to greyscale and applied dct2 on it.now i want to do huffman coding of this.Plz tell me how to do this and also tell me if i am wrong.
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I=imread('lena.jpg'); % Reads the image whose name is lena & format is jpg.
whos %
save I
load I
T1=I;
figure;imshow(I);
title('coloured image of lena')
T1=im2double(T1);
G=rgb2gray(T1);
whos
imshow(G);
imagesc(G);title('grayscale image of lena')
T2=G;
Z=dct2(T2);
figure;imshow(Z);
title('dct transformed')
1 个评论
Walter Roberson
2013-11-27
dct is for lossy encoding, not lossless encoding.
dct and huffman is very likely "modified huffman encoding" rather than pure huffman encoding. You need to research the algorithm.
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