1. JPEG2000 Overview By L A Rønningen, Item, NTNU 2008 Presentation based on: [4] Lecture notes on JPEG2000, by prof. M Fowler, Binghamton University, New York [3] Z. Li and M Drew, ”Fundamentals of Multimedia”, Pearson 2004 [2] A. Skodras, C Christopoulos, and T Ebrahimi, ”The JPEG2000 Still Image Compression Standard. IEEE Signal Processing Magazine, 2001 [1] D. Taubman and M. Barcellin, ”JPEG2000: Standard for Interactive Imaging. Proc of the IEEE, Vol 90, No 8, August 2002

6. Extend input sequence, Convolve with the two filters, descard every other Or use Lifting filter

7. SNR

11. ’1’’0’ Sample values from SQEach sample can be truncated, one or more bits

14. Conceptual correspondence between the spatial and the bit stream representations Image component Tile Precinct Code blocks Code stream Layer – packets from several resolution levels Packet - all code blocks of a precinct Coded Code block Note: H stands for header Packets and layers

16. Region of interest - ROI - Code important objects with higher quality than less important objects Scaling quality of ROI by placing the samples in higher bitplanes

17. To extract an arbitrarily shaped object, segmentation is needed. A rectangular bit mask, giving ’1’ for pixels inside the object and ’0’ for pixels outside the object, can be applied