Volume : III, Issue : IX, September - 2013

Visually Lossless JPEG2000 Image Compression

Dr. R. B. Dubey, Parul

Abstract :

Conventional lossless image compression methods aim to compress images such that every single bit of decompressed image data is identical to the original and yield moderate compression ratios. Generally, the sensitivity of the human visual system to quantization distortion produced by the JPEG2000 image compression standard is investigated and a visual distortion model is then proposed and incorporated into a JPEG2000 image encoder to yield visually lossless compression. This method uses the visibility thresholds (VTs) for image compression. The VTs are obtained by quantization distortion that is based on distribution of wavelet coefficients and the dead–zone quantizer. A visual masking model adjusts the resulting VTs. Compared with numerically lossless compression of JPEG2000; the visually lossless compression method achieves significant reduction in bit–rate without visual quality degradation. Resulting code–streams obtained by this method are fully JPEG2000 part–I compliant.

Keywords :

Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Dr. R. B. Dubey, Parul Visually Lossless JPEG2000 Image Compression Indian Journal of Applied Research, Vol.III, Issue.IX September 2013

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