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Department of Information and Communications Engineering Universitat Autònoma de Barcelona, Spain

OVERVIEW OF JPEG2000 CORE CODING SYSTEM. Francesc Aulí -Llinàs. Department of Information and Communications Engineering Universitat Autònoma de Barcelona, Spain. JPEG2000 CORE CODING SYSTEM. ORIGINAL IMAGE. MULTI-COMPONENT TRANSFORM. JPEG2000 CORE CODING SYSTEM. ORIGINAL IMAGE.

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Department of Information and Communications Engineering Universitat Autònoma de Barcelona, Spain

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  1. OVERVIEW OF JPEG2000 CORE CODING SYSTEM Francesc Aulí-Llinàs Department of Information and Communications Engineering UniversitatAutònoma de Barcelona, Spain

  2. JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  3. MULTI-COMPONENT TRANSFORM JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  4. MULTI-COMPONENT TRANSFORM WAVELET TRANSFORM QUANTIZATION JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  5. MULTI-COMPONENT TRANSFORM WAVELET TRANSFORM QUANTIZATION JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  6. MULTI-COMPONENT TRANSFORM WAVELET TRANSFORM QUANTIZATION JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  7. MULTI-COMPONENT TRANSFORM WAVELET TRANSFORM QUANTIZATION JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  8. bitplane coding pass MULTI-COMPONENT TRANSFORM WAVELET TRANSFORM QUANTIZATION JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  9. bitplane coding pass MULTI-COMPONENT TRANSFORM WAVELET TRANSFORM Types of coding passes: SPP - Significance Propagation MRP - Magnitude Refinement CP - Cleanup QUANTIZATION SPP MRP CP JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  10. MULTI-COMPONENT TRANSFORM WAVELET TRANSFORM Types of coding passes: SPP - Significance Propagation MRP - Magnitude Refinement CP - Cleanup QUANTIZATION SPP MRP CP JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  11. MULTI-COMPONENT TRANSFORM TIER-1 CODING WAVELET TRANSFORM QUANTIZATION JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  12. MULTI-COMPONENT TRANSFORM TIER-1 CODING WAVELET TRANSFORM QUANTIZATION JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  13. MULTI-COMPONENT TRANSFORM TIER-1 CODING WAVELET TRANSFORM QUANTIZATION JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE

  14. MULTI-COMPONENT TRANSFORM TIER-1 CODING TIER-2 CODING RD OPTIMIZATION WAVELET TRANSFORM QUANTIZATION JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE JP2 CODESTREAM 1. TARGET BITRATE  Qualitymaximization 2. TARGET QUALITY  Bitrateminimization

  15. D MULTI-COMPONENT TRANSFORM TIER-1 CODING TIER-2 CODING RD OPTIMIZATION WAVELET TRANSFORM “convexhull” QUANTIZATION R JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE R1,D1 R4,D4 R2,D2 R3,D3 R5,D5 1 2 3 4 5 JP2 CODESTREAM 1. TARGET BITRATE  Qualitymaximization 2. TARGET QUALITY  Bitrateminimization

  16. D RD OPTIMIZATION TIER-2 CODING TIER-1 CODING MULTI-COMPONENT TRANSFORM WAVELET TRANSFORM QUANTIZATION R JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE R1,D1 R4,D4 R2,D2 R3,D3 R5,D5 • Lagrangemultiplieroptimization: • Determine the ”convexhull” forallcodeblocks • Compute theslope of allcodestreamsegmentsontheconvexhull • Selectsegmentswithhighestslopeuntilreachingthe target bitrateorquality JP2 CODESTREAM

  17. 25% MULTI-COMPONENT TRANSFORM TIER-1 CODING TIER-2 CODING 60% WAVELET TRANSFORM QUANTIZATION 15% CODING TIME JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE JP2 CODESTREAM

  18. màxima qualitat màxima qualitat MULTI-COMPONENT TRANSFORM TIER-1 CODING TIER-2 CODING WAVELET TRANSFORM QUANTIZATION màxima qualitat JPEG2000 CORE CODING SYSTEM ORIGINAL IMAGE JP2 CODESTREAM

  19. MULTI-COMPONENT TRANSFORM TIER-1 CODING TIER-2 CODING WAVELET TRANSFORM QUANTIZATION JPEG2000 CORE CODING SYSTEM resolució 1 resolució 2 resolució 3 ORIGINAL IMAGE JP2 CODESTREAM

  20. JPEG2000 CORE CODING SYSTEM JPEG2000

  21. JPEG2000 CORE CODING SYSTEM

  22. JPEG2000 CORE CODING SYSTEM

  23. JPEG2000 CORE CODING SYSTEM

  24. JPEG2000 CORE CODING SYSTEM

  25. Scanned coefficient 9 differentcontextstocodesignificance status (dependingontheneighbors)‏ 5 differentcontextstocodethesign(dependingontheneighbors)‏ JPEG2000 CORE CODING SYSTEM • Significance propagation pass • Magnitude refinement pass • Cleanup pass non significant coefficient significant coefficient coefficients to scan

  26. 1 0 1 0 1 1 refinement in this bit plane: 0/1 3 different contexts to code refinement JPEG2000 CORE CODING SYSTEM • Significance propagation pass • Magnitude refinement pass • Cleanup pass non significant coefficient significantcoefficient (previous bit planes)‏

  27. same coding contexts as the significance propagation pass + run mode (2 special contexts) JPEG2000 CORE CODING SYSTEM • Significance propagation pass • Magnitude refinement pass • Cleanup pass non visited coefficients visited coefficients

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