Scale Factor of Resolution Conversion Based on Orthogonal Transforms

Shogo MURAMATSU  Hitoshi KIYA  Masahiko SAGAWA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E76-A    No.7    pp.1150-1153
Publication Date: 1993/07/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section of Letters Selected from the 1993 IEICE Spring Conference)
digital image processing,  filter banks,  resolution conversion,  orthogonal transform,  

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It is known that the resolution conversion based on orthogonal transform has a problem that is difference of luminance between the converted image and the original. In this paper, the scale factor of the system employing various orthogonal transforms is generally formulated by considering the DC gain, and the condition of alias free for DC component is indicated. If the condition is satisfied, then the scale factor is determined by only the basis functions.