Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1984-03-05
1987-04-14
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358 13, 358138, 358135, 358284, H04N 140, H04N 1106, H04N 712
Patent
active
046583009
ABSTRACT:
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 ##EQU1## (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.
REFERENCES:
patent: 4068265 (1978-01-01), Russell
patent: 4068266 (1978-01-01), Liao
Kawamura Hideaki
Sakurada Nobuaki
Sasaki Takashi
Britton Howard W.
Canon Kabushiki Kaisha
Peng John K.
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