This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN -

hufman coding. Input QUALITY determines the amount of information that is lost and compression achieved. Y is an encoding structure containing fields: Y.size Size of X Y.numblocks Number of 8-by-8 encoded blocks Y.qualit