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Image Resizing in an Arbitrary Block Transform Domain Using the Filters Suitable to Image Signal  

Oh, Hyung-Suk (College of Electronics and Information Engr., Kyunghee University)
Kim, Won-Ha (College of Electronics and Information Engr., Kyunghee University)
Koo, Jun-Mo (MCube Works)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.45, no.5, 2008 , pp. 52-62 More about this Journal
Abstract
In this paper, we develop a method that changes the resolutions of images in an arbitrary block transform domain by using a filter that suits to the characteristics of the underlying images. To accomplish this, we represent each procedure resizing images in an arbitrary transform domain as matrix multiplications and we derive the matrix that scales the image resolutions from the matrix multiplications. The resolution scaling matrix is also designed to be able to select the up/down-sampling filter that suits the characteristics of the image. Experiments show that the proposed method produces the reliable performances when it is applied to various transforms and to images that are mixed with predicted and non-predicted blocks which are generated during video coding.
Keywords
Image resizing; block transform; image/video coding;
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