A DCT-Based Scheme for Lossless Image Compression

  title={A DCT-Based Scheme for Lossless Image Compression},
  author={Giridhar D. Mandyam},
In this paper, a new method to achieve lossless compression of two-dimensional images based on the discrete cosine transform (DCT) is proposed. This method quantizes the high energy DCT coeecients in each block, nds an inverse DCT from only these quantized coeecients, and forms an error residual sequence to be coded. Furthermore, a simple delta modulation scheme is performed on the coeecients that exploits correlation between high energy DCT coeecients in neighboring blocks of an image. The… CONTINUE READING
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