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JPEG2000 Overview

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

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JPEG2000 Overview

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  1. JPEG2000 Overview By L A Rønningen, Item, NTNU 2008 Presentationbasedon: [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 ProcessingMagazine, 2001 [1] D. Taubman and M. Barcellin, ”JPEG2000: Standard for InteractiveImaging. Procofthe IEEE, Vol 90, No 8, August 2002

  2. Extend input sequence, Convolvewiththetwo filters, descardevery other Or use Lifting filter

  3. SNR

  4. ’0’ ’1’ Samplevalues from SQ Eachsamplecanbe truncated, one or more bits

  5. Packets and layers Image component Code stream Layer – packets from severalresolutionlevels Tile Packet- all codeblocksof a precinct Precinct Codeblocks CodedCode block Note: H stands for header Conceptualcorrespondencebetweenthe spatial and the bit streamrepresentations

  6. Region ofinterest - ROI - Codeimportantobjectswithhigherquality than less importantobjects Scalingqualityof ROI by placingthesamples in higherbitplanes

  7. To extract an arbitrarilyshapedobject, segmentation is needed. A rectangular bit mask, giving ’1’ for pixelsinside theobject and ’0’ for pixelsoutsidetheobject, can be applied

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