Image data compression by DCT with adaptive run-length coding

Author

Arazaki, Shin-Ichi ; Saigusa, Masahito ; Hashiguchi, Sumihisa ; Ohki, Makoto ; Uchiyama, Masayuki ; Itoh, F.

Author_Institution

Fac. of Eng., Yamanashi Univ., Kofu, Japan

Volume

37

Issue

4

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

860

Lastpage

866

Abstract

Efficient adaptive discrete cosine transform (DCT) encoding for data compression is described. This algorithm is simple and is suitable for digital still cameras. At a bit rate of 1.2 b/pixel, a signal-to-noise (S/N) ratio of about 40 dB was achieved when applied to the Standard Image Database (SIDBA) `girl Y´ images. The data for the DCT coefficients are compressed by adaptive run-length coding, in which either the run-length coding or the non-run-length coding was selected based on the number of zero data in each of the subdivided pictures. By adopting nonlinear quantizers, the Huffman code table was successfully compressed with very little degradation in the images

Keywords

data compression; encoding; picture processing; transforms; DCT; SNR; adaptive discrete cosine transform; adaptive run-length coding; digital still cameras; image data compression; Data compression; Degradation; Digital cameras; Digital integrated circuits; Discrete cosine transforms; Encoding; Image coding; Image resolution; Pixel; Quantization;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.106950

Filename

106950