Patent ID: 8942507
Filing Date: 2015-01-27
Classification: G06T

Abstract:
1. A method for processing an image signal wherein said image signal is consisted of a plurality of pixel signal values arranged two-dimensionally, comprising: (a) extracting a block of pixel signal values from said pixel signal values; (b) producing a set of frequency coefficients by an orthogonal transformation with said block of pixel signal values; (c) providing a set of compensating coefficients; (d) converting said set of frequency coefficients to a set of compensated frequency coefficients by multiplying each compensating coefficient of said set of compensating coefficients to a corresponding frequency coefficient of said set of frequency coefficients; (e) producing at least one represented pixel signal value that corresponds to a arbitrary location between adjacent pixel signal values of said block of pixel signal values by an inverse transformation of said orthogonal transformation with said set of compensated frequency coefficients by decreasing an interval for reproduction of pixel signal values; and (f) applying said represented pixel signal value to a converted image signal as a pixel signal value corresponding to said arbitrary location of said converted image signal, wherein each compensating coefficient of said set of compensating coefficients corresponds to a ratio of a frequency response caused by sampling by the pixels of said converted image signal to a frequency response caused by sampling by the pixels of said image signal at corresponding frequency.