发明名称 System and method for processing image signals
摘要 A video signal processing method and apparatus retrieves pixel signals by sampling an input video signal consisting of a plurality of horizontal scanning lines. In this method, the ratio of the number of vertical pixels to the number of horizontal scanning lines is set into for example 2 or less; in the vertical direction, the pixel signals of the vertical pixels are obtained by the interpolation on the basis of the pixel signals sampled from a plurality of horizontal scanning lines; while in the horizontal direction, the input video signal is sampled at the horizontal sampling frequency to be determined by that ratio. In the above interpolation processing, the ratio of the number of recording pixels to the number of original pixels in the direction of height or width of an image picture is set into <IMAGE> (where, n and M are positive integers). There is also provided a video signal recording system for recording the image picture in accordance with the pixel signals to be obtained by the sampling circuit on a recording paper. According to the present invention, it is possible to obtain and print out high-quality image pictures with desired various sizes without changing dot densities by means of a simple processing circuit.
申请公布号 US4658300(A) 申请公布日期 1987.04.14
申请号 US19840586189 申请日期 1984.03.05
申请人 CANON KABUSHIKI KAISHA 发明人 KAWAMURA, HIDEAKI;SAKURADA, NOBUAKI;SASAKI, TAKASHI
分类号 G06T3/40;H04N1/393;(IPC1-7):H04N1/40;H04N7/12;H04N11/06 主分类号 G06T3/40
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