JPEG 2000 is an image compression standard that utilizes discrete wavelet transform (DWT) to achieve improved compression efficiency, allowing for both lossy and lossless compression with features like progressive decoding and region of interest (ROI) coding. Compared to JPEG, JPEG 2000 offers enhanced error resilience and supports multi-resolution image representation, making it suitable for various applications including volumetric imaging and wireless applications. The document also outlines the encoding architecture, standardization process, and available resources for the JPEG 2000 codec.

1. JPEG2000 in a nutshell B.Michel (Twist – UCL) 28/05/09

2. Discrete Wavelet Transform DWT = intra-component decorrelation  concentrate image energy in a small area No blocking artefacts at high compression ratios Enables multi-resolution image representation 28/05/09 UCL/TELE - JPEG 2000  

3. JPEG 2000 features Improved compression efficiency Lossy to lossless compression Single compression / Multiple decompression Progressive decoding Scalability : Resolution Quality (SNR scalability) Region of Interest Coding (ROI) Error Resilience 28/05/09 UCL/TELE - JPEG 2000

4. Compression efficiency 28/05/09 UCL/TELE - JPEG 2000 JPEG 1:137 JPEG2000 1:137

5. Compression efficiency 28/05/09 UCL/TELE - JPEG 2000 JPEG 1:126 JPEG2000 1:126

6. Multiple decompressions 28/05/09 UCL/TELE - JPEG 2000 Compression Decompression storage

7. Progressive transmissions 28/05/09 UCL/TELE - JPEG 2000 Progression in resolution Compression Progression in quality Spatial Progression storage

8. Scalability : by resolution (1) 28/05/09 UCL/TELE - JPEG 2000

9. Scalability : by resolution (2) 28/05/09 UCL/TELE - JPEG 2000 + + 2.6 kBytes (1:100)

10. Scalability : by quality 28/05/09 UCL/TELE - JPEG 2000

11. Scalability : by quality (ctd) 28/05/09 UCL/TELE - JPEG 2000 1.6 % download 8.0 % download 2.2 % download 26.4 % download 100 % download

12. Region of Interest 28/05/09 UCL/TELE - JPEG 2000

13. Robustness to errors Embedded error : 16 bytes set to 0 in the middle of the compressed file 28/05/09 UCL/TELE - JPEG 2000 JPEG JPEG2000

14. JPEG 2000 Overview 28/05/09 UCL/TELE - JPEG 2000 Pre- processing Wavelet Transform Quant. Coefficient bit model Arithmetic coding Data Ordering ROI Codestream Image Rate Control

15. Useful Concepts Code-block : each sub-band from each tile-component is partitioned into code-blocks. Bit-plane : each code-block will be entropy-encoded independently bit-plane by bit-plane. 28/05/09 UCL/TELE - JPEG 2000 MSB LSB Bit-plane i DWT

16. Data Ordering 28/05/09 UCL/TELE - JPEG 2000 Tile-body (Data) Main header EOC Tile- header Tile header Tile- header Tile- header Tile-body (Data) Tile-body (Data) packet header Code-block i Entropic Data P 1 P 2 P 3 P n … EPH SOP … Code block inclusion Zero bit plane information Number of coding passes Data length Code-block n Entropic Data

17. Standardization Process J2K parts under development : Part 8, JPSEC ( security aspects ) Part 9, JPIP ( interactive protocols and API ) Part 10, JP3D ( volumetric imaging ) Part 11, JPWL ( wireless applications ) 28/05/09 UCL/TELE - JPEG 2000

18. Compared side by side 28/05/09 UCL/TELE - JPEG 2000

19. Compared side by side 28/05/09 UCL/TELE - JPEG 2000

20. Error resilience examples 28/05/09 UCL/TELE - JPEG 2000

21. Multi-resolution example 28/05/09 UCL/TELE - JPEG 2000

22. OpenJPEG Open source JPEG 2000 coder and decoder Implemented in C language Developed at UCL http://www.openjpeg.org/ 28/05/09 UCL/TELE - JPEG 2000

23. Thank you ! And visit also : www.twist-cluster.be www.xdcinema.com www.intopix.com www.tele.ucl.ac.be www.openjpeg.org 28/05/09 UCL/TELE - JPEG 2000

24. References ISO, JPEG 2000 International Standard Taubman, D. and Marcellin, M. (November 2001) JPEG2000: Image compression fundamentals, standards and practice , Boston, Kluwer Academic Publishers, 795 pgs. Taubman, High performance scalable image processing with EBCOT, IEEE Trans. on Image processing , July 2000. Rabbani, Joshi, An overview of the JPEG2000 still image compression standard , Signal processing: Image communication 17(2002) p 3-48. Special issue on JPEG2000 , Signal Processing: Image Communication. Elsevier, Volume 17, Issue 1, January 2002 28/05/09 UCL/TELE - JPEG 2000