Method and apparatus for processing and reproducing images

Details Method and apparatus for processing and reproducing images Method and apparatus for processing and reproducing images

1989-11-22

1992-10-13

Fuller, Benjamin R.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358459, H04N 123

Patent

active

051555980

ABSTRACT:
Image information relating to an image is printed in a laser printer by forming image elements according to a raster pattern of image points and printing dots in a fixed number N of the image points within each image element, N being smaller than the number of image points in an image element. The image points wherein a dot is to be printed are arranged into a cluster with a minimal perimeter. The dots printed within an image element are all printed with the same intensity and thus have the same diameter, and may overlap contiguous image points in order to fill up the total area of the image element. In an embodiment the position of the cluster within each image element is selected according to the image information.

REFERENCES:
patent: 3725574 (1972-02-01), Gast
patent: 3977007 (1976-08-01), Berry et al.
patent: 4084183 (1978-04-01), Keller et al.
patent: 4084259 (1978-04-01), Cahill et al.
patent: 4110795 (1978-08-01), Spencer
patent: 4504115 (1985-03-01), Ogawa et al.
patent: 4654721 (1987-03-01), Goertzel et al.
patent: 4700235 (1987-10-01), Gall
patent: 4884080 (1989-02-01), Hirahara et al.
patent: 4890121 (1989-12-01), Hirahara et al.
IBM Journal of Research & Development vol. 26 No. 6 Nov. 1982, N.Y. pp. 687-697 "Digital Halftoning of Images".
RCA Review vol. 31, No. 3 (Sep. 1970) pp. 517-533 "Electronically Dithered Half-Tone Pictures".

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