Exposure controlling method and an exposure controlling apparatu

Details Exposure controlling method and an exposure controlling apparatu Exposure controlling method and an exposure controlling apparatu

1995-04-06

1998-04-14

Evans, Arthur G.

Image analysis

Histogram processing

For setting a threshold

382199, G06K 1500

Patent

active

057403309

ABSTRACT:
Representative points are added to peripheral pixels in every black pixel groups. The thus generated representative points are joined by a curve-fitting approximation method to obtain an outlined curve for every black pixel group. One pixel is divided into a multiple number of sub-pixels. Pulse signals supplied to a laser is modulated on pulse width so that the sub-pixels (hatched section) belonging to the inside of each curve may be exposed to laser beams.

REFERENCES:
patent: 5299308 (1994-03-01), Suzuki et al.
patent: 5404233 (1995-04-01), Nagata et al.

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