Image analysis – Image enhancement or restoration – Intensity – brightness – contrast – or shading correction
Patent
1997-10-17
2000-02-08
Lee, Thomas D.
Image analysis
Image enhancement or restoration
Intensity, brightness, contrast, or shading correction
382312, 348254, 358461, G06K 940, G06K 700, H04N 5202, H04N 140
Patent
active
060235322
ABSTRACT:
A specified lightness of a scanned image can be obtained by selecting from among plural gamma functions or by changing a light amount signal output by the line sensor of the scanning apparatus. Changing the light amount output may be accomplished by controlling the lighting time of each light source, or by adjusting the interval of a shift pulse of the line sensor, or by controlling the charge storage time of the line sensor. A controller adjusts the lighting time of the light source or the gradient of the gamma function in response to a specified lightness from an external computer so that image data in such specified lightness can be obtained. For example, in the case where the lightness is increased, if the user wishes a high quality image, the lighting time is increased, whereas if the user attaches importance to high speed reading, the gradient of the gamma function is increased. Further, in the case where the lightness is decreased, if the user wishes a high quality image, the gradient of the gamma function is decreased, whereas if the user attaches importance to high speed reading, the lighting time is shortened.
REFERENCES:
patent: 4700236 (1987-10-01), Abe
patent: 4791493 (1988-12-01), Ogura et al.
patent: 4888616 (1989-12-01), Nanamura et al.
patent: 5038225 (1991-08-01), Maeshima
patent: 5105264 (1992-04-01), Erhardt
patent: 5173789 (1992-12-01), Renner et al.
patent: 5185668 (1993-02-01), Ohta
patent: 5212569 (1993-05-01), Takada
patent: 5295204 (1994-03-01), Parulski
patent: 5296944 (1994-03-01), Suzuki et al.
patent: 5550651 (1996-08-01), Terajima
Ichinose Shuichi
Kanesaka Yoshinori
Chen Wenpeng
Lee Thomas D.
Seiko Epson Corporation
LandOfFree
Image reading apparatus, method and system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image reading apparatus, method and system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image reading apparatus, method and system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1686889