Circuit arrangement for white level acquisition for the black/wh

Details Circuit arrangement for white level acquisition for the black/wh Circuit arrangement for white level acquisition for the black/wh

1989-09-25

1991-02-19

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 52, 358466, G06K 900

Patent

active

049950924

ABSTRACT:
A circuit arrangement is composed of a first adder whose first output is assigned to the digitized output signals of the photosensors and a second input connected to the outputs of a white level memory, and a second adder at whose input side the currently stored white level are linked with the correction signal and which reads the resultant signal back into the white level memory, the comparator following the first adder which, dependent upon the threshold level derived from maximum and average blackening values of the output signal of the first adder supplies a black signal or a white signal. A correction signal derived from a plurality of influencing variables serves for white level correction, the correction signal supplying a white level increment/decrement for delivery into the white level memory dependent on a carry signal that appears or, respectively, that does not appear at the first adder.

REFERENCES:
patent: 4468704 (1984-08-01), Stoffel et al.
patent: 4562486 (1985-12-01), Suzuki et al.
patent: 4667237 (1987-05-01), Yakomizo
patent: 4710822 (1987-12-01), Matsunawa
patent: 4853792 (1989-08-01), Katsuta et al.
Reese, R. J.; "Black and White Level Follower Device for an OCR System", IBM Technical Disclosure Bulletin, vol. 22, No. 6, Nov., 1979, pp. 2248-2249.

Affiliated with

Also associated with

Rating

Circuit arrangement for white level acquisition for the black/wh does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit arrangement for white level acquisition for the black/wh, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit arrangement for white level acquisition for the black/wh will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1150585