Method of determining amount of exposure

Details Method of determining amount of exposure Method of determining amount of exposure

1995-11-02

1998-05-12

Moses, R. L.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 35, 355 38, 355 40, G03B 2732, G03B 2752, G03B 2772, G03B 2780

Patent

active

057514011

ABSTRACT:
The improved method of determining the amount of exposure for use with an image forming apparatus reads the red, green and blue densities of an original image on a pixel basis and determines the amount of exposure of a light-sensitive material in accordance with the result of the reading step. In the method, those pixels of the same color which have been found to have red, green and blue densities within respective predetermined ranges as a result of the reading of said original image are added and after at least part of the pixels that represent a color having a greater number of pixels than a specified value are removed, the remaining pixels are used to perform mathematical operations for determining the amount of exposure. When applied to various types of optical image forming apparatus such as copiers, printers and photograph printing devices, the method enables consistent production of good prints having no density or color failure without the need to specify the identity of an image scene of interest even if a large area of the image is occupied by a particular color as in a scene showing a person on the lawn or a scene taken with backlighting.

REFERENCES:
patent: 3677641 (1972-07-01), King et al.
patent: 4001594 (1977-01-01), Akimoto et al.
patent: 4531150 (1985-07-01), Amano
patent: 4745465 (1988-05-01), Kwon
patent: 5353095 (1994-10-01), Terashita
patent: 5461457 (1995-10-01), Nakamura
patent: 5475493 (1995-12-01), Yamana
patent: 5502776 (1996-03-01), Manabe

Affiliated with

Also associated with

Rating

Method of determining amount of exposure 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 of determining amount of exposure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of determining amount of exposure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-986904