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Record W2110351882 · doi:10.1109/icip.1997.647989

Stack-run coding with space-frequency quantization

2002· article· en· W2110351882 on OpenAlex
L.L. Winger, A.N. Venetsanopoulos

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

Venuenot available
Typearticle
Languageen
FieldComputer Science
TopicAdvanced Data Compression Techniques
Canadian institutionsUniversity of Toronto
Fundersnot available
KeywordsQuantization (signal processing)AlgorithmTrellis quantizationWaveletComputer scienceLossy compressionDecoding methodsRaster graphicsCoding (social sciences)MathematicsImage compressionArtificial intelligenceImage processingImage (mathematics)Statistics

Abstract

fetched live from OpenAlex

The choice of quantization method in wavelet image compression is a crucial issue that affects performance, quality, and system design. Space-frequency scalar quantization of zero-trees achieves excellent coding efficiency. Stack-run coding is an efficient alternative to zero-trees which maintains independence between subbands. We present a new approach to wavelet quantization which enhances the stack-run coding method. Low addressing complexity, independence between subbands, and fast, parallel decoding are preserved while superior performance is obtained. The most important features are the optimization of dead-zone scalar quantizers, raster scan pattern selection, and the local (spatial) optimization of quantization coefficients. The local optimization is not spatially restricted (as with zero-trees) and new non-recursive optimal algorithms are now possible. Simulation results indicate that the new technique is strongly PSNR competitive with the best of current lossy wavelet image coders. The new framework also allows insight into the nature of the performance gains achieved by space-frequency quantization.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: none
GenreCandidate signal: Methods · Consensus signal: Methods
Teacher disagreement score0.894
Threshold uncertainty score0.332

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.001
Open science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.027
GPT teacher head0.251
Teacher spread0.224 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Quick stats

Citations3
Published2002
Admission routes1
Has abstractyes

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