Region-based DCT image coding scheme

Anthony J. Maeder; Matthew S. Baker

doi:10.1117/12.274514

Region-based DCT image coding scheme

Research output: Contribution to journal › Conference article › peer-review

Abstract

This paper describes an attempt to broaden the scope of conventional block-based DCT image coding, by allowing some variation in quantization of DCT values for different blocks in the image. Blocks belonging to each individual spatial region in the image are afforded a particular level of quantization selected for that region. This approach allows desirable levels of compression efficiency and visual quality to be achieved for different parts of the reconstructed image. The scheme offers improved overall balancing of fidelity performance, as well as benefits for applications which undertake further processing using the image regions, such as video coding.

Original language	English
Pages (from-to)	195-202
Number of pages	8
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	3016
DOIs	https://doi.org/10.1117/12.274514
Publication status	Published - 3 Jun 1997
Externally published	Yes
Event	Human Vision and Electronic Imaging II - San Jose, CA, United States Duration: 10 Feb 1997 → 10 Feb 1997

Keywords

Compression
DCT
Image coding
Quality
Region

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10.1117/12.274514Licence: In Copyright

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AB - This paper describes an attempt to broaden the scope of conventional block-based DCT image coding, by allowing some variation in quantization of DCT values for different blocks in the image. Blocks belonging to each individual spatial region in the image are afforded a particular level of quantization selected for that region. This approach allows desirable levels of compression efficiency and visual quality to be achieved for different parts of the reconstructed image. The scheme offers improved overall balancing of fidelity performance, as well as benefits for applications which undertake further processing using the image regions, such as video coding.

KW - Compression

KW - DCT

KW - Image coding

KW - Quality

KW - Region

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JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - Human Vision and Electronic Imaging II

Y2 - 10 February 1997 through 10 February 1997

ER -

Region-based DCT image coding scheme

Abstract

Keywords

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