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.
雑誌名
IEICE transactions on fundamentals of electronics, communications and computer sciences
巻
E76-A
号
7
ページ
1150 - 1153
発行年
1993-07
出版者
The Institute of Electronics, Information and Communication Engineers