image compression using dct,zigzag scan and runlength coding.
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hello, I am trying to compress an image by applying dct, zigzag scan and run length coding. but I am stuck at zigzag coding.so can anybody tell me that how to apply zigzag scan now..here is my code till quantization.
clc;
I = imread('cameraman.tif');
I = im2double(I);
T= dctmtx(8);
B = blkproc(I,[8 8],'P1*x*P2',T,T');
%fun=@dct2;
%B = blkproc(A,[8 8],fun);
q= [16 11 10 16 24 40 51 61;
12 12 14 19 26 58 60 55;
14 13 16 24 40 57 69 56;
14 17 22 29 51 87 80 62;
18 22 37 56 68 109 103 77;
24 35 55 64 81 104 113 92;
49 64 78 87 103 121 120 101;
72 92 95 98 112 100 103 99]/255;
B2= blkproc(B,[8 8],'round(x./P1).*P1',q);
imshow(I), figure, imshow(B), figure, imshow(B2);
댓글 수: 6
Walter Roberson
2015년 9월 21일
P1 will be T, P2 will be T' and x will be the data.
This code was designed using the blkproc() routine that was obsolete for several years before the code was posted.
답변 (1개)
Paula Souza
2016년 1월 27일
Olá, como salvo os dados comprimidos pelo RLC no matlab?
댓글 수: 1
Walter Roberson
2016년 1월 27일
편집: Walter Roberson
2016년 1월 27일
Approximate translation:
Hello, how to save compressed data by Run Length Coding in matlab?
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