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

fYear

2002

fDate

2002

Firstpage

67

Lastpage

71

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Analysis and Interpretation, 2002. Proceedings. Fifth IEEE Southwest Symposium on

Conference_Location

Sante Fe, NM

Print_ISBN

0-7695-1537-1

Type

conf

DOI

10.1109/IAI.2002.999891

Filename

999891