DCT-based scheme for lossless image compression

Giridhar D. Mandyam; Nasir Ahmed; Neeraj Magotra; Nasir U. Ahmed

doi:10.1117/12.206386

17 April 1995 DCT-based scheme for lossless image compression

Giridhar D. Mandyam, Nasir Ahmed, Neeraj Magotra, Nasir U. Ahmed

Proceedings Volume 2419, Digital Video Compression: Algorithms and Technologies 1995; (1995) https://doi.org/10.1117/12.206386
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

In this paper, a new method to achieve lossless compression of 2D images based on the discrete cosine transform (DCT) is proposed. This method quantizes the high energy DCT coefficients in each block, finds an inverse DCT from only these quantized coefficients, and forms an error residual sequence to be coded. Furthermore, a simple delta modulation scheme is performed on the coefficients that exploits correlation between high energy DCT coefficients in neighboring blocks of an image. The resulting sequence is compressed by using an entropy coder, and simulations show the results to be promising and more effective than just simply performing entropy coding on original raw image data.

Citation Download Citation

Giridhar D. Mandyam, Nasir Ahmed, Neeraj Magotra, and Nasir U. Ahmed "DCT-based scheme for lossless image compression", Proc. SPIE 2419, Digital Video Compression: Algorithms and Technologies 1995, (17 April 1995); https://doi.org/10.1117/12.206386

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