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 -

matlab is the one of the best tool.it is usefull to u all .in this image stenography method is good.jpeg compresion.imag stegno ,image compression using nural netwoks.total all codes

Including compression ratio, image restoration computing uptime and peak signal to noise ratio, Automatic identification in the matlab environment the size of the connected area, Channel coding, modulation, channel estimation.