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Category : Special Effects
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- Update : 2012-11-26
- Size : 185kb
- Downloaded ：0次
- Author ：neethu******
- About ：
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Introduction - If you have any usage issues, please Google them yourself
clc
img = imread( lena.bmp )
JPEG compression
jpegcompression(img, lena_compressed.mat )
JPEG decompression
Irec = jpegrestoration( lena_compressed.mat )
System performances
[CR,BPP,PSNR,MSE,SNR] = systemperformances(img,Irec, lena_compressed.mat )
Plotting
figure,subplot(1,2,1),imshow(img),title( Original image ),...
subplot(1,2,2),imshow(Irec),title( Compressed image )
disp( Compression ratio: )
disp(CR)
disp( Bits per pixel: )
disp(BPP)
disp( Peak signal to noise ratio: )
disp(PSNR)
disp( Mean squared error: )
disp(MSE)
disp( Signal to noise ratio )
disp(SNR)
Packet file list
(Preview for download)
jpegprotected\1.jpg
.............\colorconversion.p
.............\jpegcompression.p
.............\jpegrestoration.p
.............\lena_compressed.mat
.............\systemperformances.m
.............\test_main.m
.............\untitled.fig
jpegprotected
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