Dithering for 12-bit true-color graphics

Author

Wells, Stuart C. ; Williamson, Grant J. ; Carrie, Susan E.

Author_Institution

Sun Microsyst., Mountain View, CA, USA

Volume

11

Issue

5

fYear

1991

Firstpage

18

Lastpage

29

Abstract

Three approaches that together improve the quality of dithered images by decreasing the intensity error and distributing the remaining quantization error more effectively, both spatially and across the intensity range, are described. The first method improves the intensity error distribution. The second method, which is complementary to the first, improves the quality of low-intensity vectors and surfaces through the use of a nonlinear quantizer. The third method specifically improves vector dithering. The primary focus is on dithering from 24 b to 12 b RGB but 24-b to 15-b dithering (5 bits each of red, green, and blue) were also investigated.<>

Keywords

computer graphics; 12-bit true-color graphics; RGB; blue; dithered images; green; intensity error; intensity range; low-intensity vectors; nonlinear quantizer; quality; quantization error; red; surfaces; vector dithering; Computer displays; Computer graphics; Distributed computing; Humans; Image restoration; Quantization; Random access memory; Sun; Vectors; Visual system;

fLanguage

English

Journal_Title

Computer Graphics and Applications, IEEE

Publisher

ieee

ISSN

0272-1716

Type

jour

DOI

10.1109/38.90564

Filename

90564