Adaptive subsampling for image data compression

Author

Chong, W.N.

Author_Institution

Canberra Univ., ACT, Australia

Volume

2

fYear

1993

fDate

19-21 Oct. 1993

Firstpage

938

Abstract

Describes a two-to-one subsampler which allows an image to be transmitted in a layered format. Subsampling can be made adaptive to local activities of the image by using gradient measurements. Simulation results show that, for a typical outdoor scene, the picture quality in terms of the PSNR ranges from about 50 dB at 10% to 30 dB at 95% of the blocks of the image being subsampled. The DCT coefficients of the low-pass subsampled output remain highly compacted, so that further data reduction is possible.<>

Keywords

data compression; discrete cosine transforms; image coding; 2-to-1 subsampler; DCT coefficients; adaptive subsampling; data reduction; discrete cosine transform; gradient measurements; image data compression; image transmission; layered format; local activities; low-pass subsampled output; outdoor scene; picture quality; picture signal-to-noise ratio; simulation; Data compression; Discrete cosine transforms; Image coding; Image reconstruction; Image resolution; Layout; Local activities; PSNR; Spatial resolution; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON '93. Proceedings. Computer, Communication, Control and Power Engineering.1993 IEEE Region 10 Conference on

Conference_Location

Beijing, China

Print_ISBN

0-7803-1233-3

Type

conf

DOI

10.1109/TENCON.1993.320167

Filename

320167