JPEG compression encoding of the main steps are: 1.forward discrete cosine transform to reduce the image data 2.Using human visual characteristics of the team DCT coefficients are quantized 3.check points pulse code modulation encoding the DC coefficient 4.coefficients of the Z-scan AC coefficient is encoded using the form length encoding team 5.the entropy encoder for entropy coding of the above descriptors.

imjpeg.m
imjpegprj.m
lena.bmp
CLA0.BMP
FFT256.BMP
GS256.BMP

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