Color image reproduction of scenes with preferential tone mappin

Details Color image reproduction of scenes with preferential tone mappin Color image reproduction of scenes with preferential tone mappin

1992-09-24

1994-04-05

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Including control feature responsive to a test or measurement

430359, 430363, 355 32, 355 40, 355 35, 355 77, 358524, 358513, 358332, 358333, G03C 718, G03C 540, G03B 2752

Patent

active

053003810

ABSTRACT:
A system and method of image reproduction in color with preferential tone mapping in which the image reproduction is subjected to a scene parameter transformation which when taken in conjunction with untransformed characteristics of the image reproduction system and method results in a reproduced tone mapping having instantaneous gamma values of viewed reproduction density relative to density of the original scene which are greater than 1.0 and less than 1.0 plus 0.35 times scene exposure density over a scene exposure density range of from 0.6 to 1.45 as measured relative to a zero density, 100% diffuse reflector in the original scene. Preferably, the instantaneous gamma values within this scene exposure density range further lie substantially within a range of values subtended by an angle of 14.degree. as measured from a reference point at 0.0 scene exposure density and 1.0 viewed reproduction density gradient.

REFERENCES:
patent: 3977872 (1976-08-01), Hellmig
patent: 4259423 (1981-03-01), Merlo et al.
patent: 4792518 (1988-12-01), Kuwashima et al.
patent: 5051341 (1991-09-01), Muenter et al.
Dr. R. W. G. Hunt; The Reproduction of Colour In Photography, Printing & Television; Fourth Edition 1987; pp. 49-66.

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