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Journal of Electronic Imaging • Open Access

Discrete-cosine-transform–domain downsizing with windowing operation
Author(s): Il-Hong Shin; Jung Ju Yoo; Jin Woo Hung

Paper Abstract

A simple and effective method is presented for discrete-cosine-transform (DCT)–domain downsizing. Various methods employed in DCT-domain downsizing simply reuse the frequency component of DCT, which shows a severe aliasing effect. The proposed approach extends the downsizing method for alleviating or reducing the aliasing effect with a windowing operation, which adjusts the magnitude of the DCT coefficient. Visual inspection showed satisfactory results, with no complexity overhead and performance degradation regarding the peak-signal-to noise ratio (PSNR) after upsampling.

Paper Details

Date Published: 1 October 2007
PDF: 3 pages
J. Electron. Imaging. 16(4) 040501 doi: 10.1117/1.2818176
Published in: Journal of Electronic Imaging Volume 16, Issue 4
Show Author Affiliations
Il-Hong Shin, Electronics and Telecommunications Research Institute (South Korea)
Jung Ju Yoo, Electronics and Telecommunications Research Institute (South Korea)
Jin Woo Hung, Electronics and Telecommunications Research Institute (South Korea)


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