Customized JPEG compression for grayscale printing

Author

Vander Kam, R.A. ; Wong, Ping Wah

Author_Institution

Hewlett-Packard Co., Palo Alto, CA, USA

fYear

1994

fDate

29-31 Mar 1994

Firstpage

156

Lastpage

165

Abstract

Describes a procedure by which JPEG compression may be customized for grayscale images that are to be compressed, halftoned, and printed. The technique maintains 100% compatibility with the JPEG standard, and is applicable with any halftoning algorithm. The JPEG quantization table is designed using frequency-domain characteristics of the halftoning patterns and the human visual system, and the Huffman tables are optimized for low-rate coding. The authors present experimental results demonstrating that the customized JPEG encoder offers a significant performance advantage over a coder that uses the default quantization and Huffman tables. The results also show that the customized encoder typically achieves rates in the range 0.13-0.25 bits per pixel (image dependent) with practically no visible compression artifacts in the printed images

Keywords

data compression; image coding; printing; Huffman tables; JPEG quantization table; JPEG standard; compression artifacts; customized JPEG compression; encoder; frequency-domain characteristics; grayscale images; grayscale printing; halftoning algorithm; halftoning patterns; human visual system; low-rate coding; performance; printed images; Clustering algorithms; Frequency; Gray-scale; Humans; Image coding; Pixel; Printing; Quantization; Transform coding; Visual system;

fLanguage

English

Publisher

ieee

Conference_Titel

Data Compression Conference, 1994. DCC '94. Proceedings

Conference_Location

Snowbird, UT

Print_ISBN

0-8186-5637-9

Type

conf

DOI

10.1109/DCC.1994.305923

Filename

305923