Color image compression by moment-preserving and block truncation coding techniques

Author

Yang, Chen-Kuei ; Lin, Ja-Chen ; Tsai, Wen-Hsiang

Author_Institution

Dept. of Inf. Manage., Ming Chuan Coll., Taipei, Taiwan

Volume

45

Issue

12

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

1513

Lastpage

1516

Abstract

A new color image compression technique based on moment-preserving and block truncation coding is proposed. An input image is divided into nonoverlapping blocks and each block pixel is assigned one of two representative colors, which are computed with analytic formulas derived from preserving certain moments in the block. A bit map is then generated for each block to represent the pixels´ colors. Different uniformity conditions in the representative colors are also identified and utilized to save code bits. Good average compression ratios up to about 13 can be achieved, as shown by experimental results

Keywords

block codes; data compression; image coding; image colour analysis; image representation; bit map; block truncation coding techniques; code bits; color image compression; compression ratios; moment-preserving coding techniques; nonoverlapping blocks; representative colors; uniform color plane; uniformity conditions; Communications Society; Councils; Covariance matrix; Helium; Image analysis; Image coding; Image color analysis; Image processing; Information management; Pixel;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.650223

Filename

650223