Self-conducted allocation strategy of quality layers for JPEG2000
EURASIP Journal on Advances in Signal Processing
Distortion estimators for bitplane image coding
IEEE Transactions on Image Processing
Enhanced JPEG2000 quality scalability through block-wise layer truncation
EURASIP Journal on Advances in Signal Processing
Lossy-to-lossless 3D image coding through prior coefficient lookup tables
Information Sciences: an International Journal
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Quality scalability is a fundamental feature of JPEG2000, achieved through the use of quality layers that are optimally formed in the encoder by rate-distortion optimization techniques. Two points, related with the practical use of quality layers, may need to be addressed when dealing with JPEG2000 code-streams: 1) the lack of quality scalability of code-streams containing a single or few quality layers and 2) the rate-distortion optimality of windows of interest transmission. Addressing these two points, this paper proposes a mechanism that, without using quality layers, provides competitive quality scalability to code-streams. Its main key-feature is a novel characterization of the code-blocks rate-distortion contribution that does not use distortion measures based on the original image, or related with the encoding process. Evaluations against the common use of quality layers, and against a theoretical optimal coding performance when decoding windows of interest or when decoding the complete image area, suggest that the proposed method achieves close to optimal results.