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Optical Engineering • Open Access

Fast directional discrete cosine transform for image compression
Author(s): Bo Chen; Hongxia Wang; Lizhi Cheng

Paper Abstract

A fast directional discrete cosine transform (FDDCT) is proposed for efficient representation of anisotropic edges in images. The transform is performed on the predefined direction lines similar to the intraprediction mode in H.264. Comparing to the directional discrete cosine transform (DDCT) now available, no interpolation is needed in FDDCT; thus, the amount of computation decreases by 80%. Simulation results indicate that the peak signal-to-noise ratios of images compressed using FDDCT are >1 db higher than those using DDCT.

Paper Details

Date Published: 1 February 2010
PDF: 3 pages
Opt. Eng. 49(2) 020501 doi: 10.1117/1.3306634
Published in: Optical Engineering Volume 49, Issue 2
Show Author Affiliations
Bo Chen, National Univ. of Defense Technology (China)
Hongxia Wang, National Univ. of Defense Technology (China)
Lizhi Cheng, National Univ. of Defense Technology (China)


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