Image analysis – Color image processing – Color correction
Patent
1996-06-21
1999-07-20
Vu, Kim Yen
Image analysis
Color image processing
Color correction
382168, 382274, 358516, 358519, 348 96, 348223, 348254, 348655, 348658, G06T 540
Patent
active
059265620
ABSTRACT:
A film image, which is taken into the developed photographic film, is picked up, and a reference maximum value and a reference minimum value of an image signal are determined by the image signal which is obtained when the image is picked up. The reference maximum value and the reference minimum value are used in the signal processing for adjusting the tone of the image, etc. Moreover, the exposure state of the film image is determined based on at least one of the reference maximum value, the reference minimum value, and the average value. If the exposure state is determined to be underexposured, the gamma in the gamma correction is smaller than the gamma during the standard exposure, so that the middle tone can be prevented from being dark. On the other hand, if the exposure state is determined to be overexposured, the gamma in the gamma correction is larger than the gamma during the standard exposure, so that the middle tone can be prevented from being too bright. If the color image is a color failure scene, at least one of the reference maximum value and the reference minimum value is corrected so as to realize the satisfactory color reproduction.
REFERENCES:
patent: 4239384 (1980-12-01), Treiber
patent: 4527881 (1985-07-01), Sugawara
patent: 4667250 (1987-05-01), Murai
patent: 4689691 (1987-08-01), Isogai et al.
patent: 4866513 (1989-09-01), Takahashi
patent: 5023656 (1991-06-01), Terashita
patent: 5036400 (1991-07-01), Haruki
patent: 5194945 (1993-03-01), Kadowaki
patent: 5210600 (1993-05-01), Hirata
patent: 5414538 (1995-05-01), Eschbach
patent: 5463702 (1995-10-01), Trueblood
patent: 5475493 (1995-12-01), Yamana
patent: 5512948 (1996-04-01), Iwamatsu
patent: 5517335 (1996-05-01), Shu
patent: 5542003 (1996-07-01), Wofford
patent: 5574764 (1996-11-01), Granfors
patent: 5640201 (1997-06-01), Inuiya
Hyodo Manabu
Tanaka Hiroshi
Fuji Photo Film Co. , Ltd.
Rosenblum David
Vu Kim Yen
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