Paper
28 December 1998 Activity-selective SPIHT coding
Marcia G. Ramos, Sheila S. Hemami
Author Affiliations +
Proceedings Volume 3653, Visual Communications and Image Processing '99; (1998) https://doi.org/10.1117/12.334680
Event: Electronic Imaging '99, 1999, San Jose, CA, United States
Abstract
An embedded image coder that provides very effective progressive image transmission and a high degree of spatial scalability while achieving superior visual performance to SPIHT is presented. A new partitioning structure combined with scale-based wavelet weights achieves a significance reordering that codes more significant information belonging to the lower frequency bands earlier in the bitstream when compared to SPIHT. This reordering provides substantial improvements in progressive transmission, spatial scalability, and PSNR, especially at low bit rates. Further visual gains are achieved by exploiting human visual system (HVS) characteristics to weight wavelet coefficients according to their perceptual importance, causing a reordering of the coefficients. The activity selective SPIHT coder provides higher perceptual quality and higher PSNRs than SPIHT at low bit rates, and comparable visual quality with slightly lower PSNRs at high bit rates.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Marcia G. Ramos and Sheila S. Hemami "Activity-selective SPIHT coding", Proc. SPIE 3653, Visual Communications and Image Processing '99, (28 December 1998); https://doi.org/10.1117/12.334680
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CITATIONS
Cited by 11 scholarly publications.
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KEYWORDS
Visualization

Image quality

Laser induced plasma spectroscopy

Wavelets

Image compression

Image transmission

Lithium

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