Low-complexity image coding

Details Low-complexity image coding Low-complexity image coding

2005-12-13

2009-11-03

Bella, Matthew C (Department: 2624)

Image analysis

Image compression or coding

Reexamination Certificate

active

07613347

ABSTRACT:
A system that compresses a digital image. During operation, the system performs a transform operation on a digital image to produce transform domain coefficients, and then quantizes the transform domain coefficients to produce quantized coefficients. The system then separates the low entropy portions of the quantized coefficients from the high entropy portions of the quantized coefficients, wherein the low entropy portions of the quantized coefficients comprise the most-significant bitplanes of the quantized coefficients. Next, the system compresses the low entropy portions of the quantized coefficients while not substantially compressing the high entropy portions of the quantized coefficients.

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Subhasis Saha and Rao Vemuri, “Adaptive wavelet coding of multimedia images”, Proceedings of the seventh ACM international conference on multimedia (part 2) multimedia '99, Oct. 1999, Publisher: ACM Press.

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