Hybrid slow scan resolution conversion

Details Hybrid slow scan resolution conversion Hybrid slow scan resolution conversion

1991-05-03

1993-06-22

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358474, 358496, 358451, 382 47, H04N 104

Patent

active

052219763

ABSTRACT:
In an image input scanner, image information is acquired by sensing light from an image at an array of photosites arranged across a path of relative movement of the array and the image. To obtain resolution k, given a nominal slow scan velocity v for the relative movement between the array and the image, slow scan velocity is varied continuously over a range of 1/2 v to v. In combination, with variation of slow scan velocity over the range of 1/2 v to v, a limited scan line throw away scheme is matched to the range of velocity, where the ratio of lines kept to lines discarded in a group of lines is defined by the ratio 1:N where for every N lines, a pattern is repeated which passes 1 line of N lines, where N is a positive integer.

REFERENCES:
patent: 3646256 (1972-02-01), Jacob et al.
patent: 4447832 (1984-05-01), Kurata et al.
patent: 4687944 (1987-08-01), Mitsuka et al.
patent: 5047871 (1991-09-01), Meyer et al.
patent: 5101282 (1992-03-01), Honma
patent: 5177626 (1993-01-01), Nosaki et al.

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