Method and apparatus for recording halftone dot image with diffe

Details Method and apparatus for recording halftone dot image with diffe Method and apparatus for recording halftone dot image with diffe

1993-08-11

1996-06-25

Wong, Peter S.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358456, 358536, 347131, H04N 140, H04N 146, G01D 1514

Patent

active

055305555

ABSTRACT:
A method of, and an apparatus for, recording halftone dots on a photosensitive film by selecting halftone dots having different minimum repeating units in response to respective original image components. SPMs (103a to 103d) previously store screen pattern (SP) signals having different minimum repeating units, while address generation controllers (AGCp to AGCs) previously store address signals corresponding to the respective SP signals. Pattern selection signals (PPS) are inputted in response to respective original image components and the address signals are selected in correspondence thereto and inputted in the SPMs (103a to 103d), thereby reading the SP signals. Comparators (104a to 104d) compare pixel signals (DSa to DSd) expressing density levels of respective pixels forming a total image with the selected SP signals, to output halftone dot signals (DOTa to DOTd) in response to the result of this comparison. Thus, it is possible to select halftone dots having different minimum repeating units in response to respective original image components, to record the same on a photosensitive film.

REFERENCES:
patent: 3742129 (1973-06-01), Roberts et al.
patent: 4149183 (1979-04-01), Pellar et al.
patent: 4727430 (1988-02-01), Miwa
patent: 4903123 (1990-02-01), Kawamura et al.
patent: 4918622 (1990-04-01), Granger et al.
patent: 4924301 (1990-05-01), Surbrook
patent: 5166809 (1992-11-01), Surbrook
patent: 5357344 (1994-10-01), Kasamatsu et al.

Affiliated with

Also associated with

Rating

Method and apparatus for recording halftone dot image with diffe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for recording halftone dot image with diffe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for recording halftone dot image with diffe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2193761