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Journal of Electronic Imaging

Enlargement and reduction of image/video via discrete cosine transform pair, part 2: reduction
Author(s): Shu-Mei Guo; Chen-Bang Li; Chia-Wei Chen; Yueh-Ching Liao; Jason Sheng-Hong Tsai
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Paper Abstract

Based on the novel matrix representations of the forward three-dimensional (3-D) discrete cosine transform (DCT) and the inverse 3-D DCT, applications for reduction of sequence/image/video are proposed. The original sequence/image/video is divided into subunits, and then the reduction is implemented in the frequency-domain by DCT. Two efficient algorithms are presented in accordance with two kinds of reducing multiples, 1/s and o1/o2, respectively. The proposed algorithms significantly eliminate ripple and blocky effects. As a result, they can provide numerous applications in data compression as well. Simulation results show that proposed mechanisms enable good performances for reductions of sequences, images, and videos as expected.

Paper Details

Date Published: 1 October 2007
PDF: 9 pages
J. Electron. Imag. 16(4) 043007 doi: 10.1117/1.2804712
Published in: Journal of Electronic Imaging Volume 16, Issue 4
Show Author Affiliations
Shu-Mei Guo, National Cheng Kung Univ. (Taiwan)
Chen-Bang Li, National Cheng Kung Univ. (Taiwan)
Chia-Wei Chen, Kao Yuan Univ. (Taiwan)
Yueh-Ching Liao, National Cheng Kung Univ. (Taiwan)
Jason Sheng-Hong Tsai, National Cheng Kung Univ. (Taiwan)

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