Title :
Tuning JPEG2000 image compression for graphics regions
Author :
Banerjee, Serene ; Evans, Brian L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
Abstract :
The new image compression standard, JPEG2000, provides higher compression rates for the same visual quality for grayscale and color images than JPEG. JPEG2000 is being adopted for image compression and transmission, eg, in mobile telephones, PDA, and wearable computers. Depending on the application, images may contain formatted text and graphics data. For graphics images at the same low bit rates, graphics compression methods, such as the graphics interchange format (GIF) and portable network graphics (PNG), outperform JPEG2000 in visual quality. In this paper, we describe problems associated with compressing graphics data with JPEG2000, and propose modifications to a JPEG2000 encoder to minimize distortion for color graphics data by using a model of the human visual system. The visual improvements are quantified by a new measure of distortion
Keywords :
computer graphics; data compression; image coding; GIF; JPEG2000; PNG; distortion minimization; graphics images; graphics interchange format; human visual system model; image compression standard; portable network graphics; Application software; Color; Computer graphics; Gray-scale; Image coding; Mobile computing; Personal digital assistants; Telephony; Transform coding; Wearable computers;
Conference_Titel :
Image Analysis and Interpretation, 2002. Proceedings. Fifth IEEE Southwest Symposium on
Conference_Location :
Sante Fe, NM
Print_ISBN :
0-7695-1537-1
DOI :
10.1109/IAI.2002.999891
