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Journal of Electronic Imaging

Enlargement and reduction of image/video via discrete cosine transform pair, part 1: novel three-dimensional discrete cosine transform and enlargement
Author(s): Shu-Mei Guo; Chen-Bang Li; Chia-Wei Chen; Yueh-Ching Liao; Jason Sheng-Hong Tsai
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Paper Abstract

We propose novel matrix-form representations of the conventional forward three-dimensional (3-D) discrete cosine transform (DCT) and the inverse 3-D DCT. The pair of the computationally efficient 3-D DCTs causes the formulation to be more concise with a systematic structure, which has a high potential for the development of other applications via the 3-D DCT pair. Applications for enlargement of image/video implemented by the DCT pair are also presented. These new algorithms effectively eliminate ripple and blocky effects and maintain the original characteristic. Moreover, due to the essentially even-function property of the DCT, the proposed enlargement of an image demonstrates the desired symmetric property. As a result, they can also find numerous applications in image processing and video coding. Simulation results show that proposed mechanisms enable good performance for scaling algorithms of sequences, images, and videos, as expected.

Paper Details

Date Published: 1 October 2007
PDF: 19 pages
J. Electron. Imaging. 16(4) 043006 doi: 10.1117/1.2804710
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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