US Patent No: 7,298,917

Number of patents in Portfolio can not be more than 2000

Image processing program product and device for executing Retinex processing

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Importance

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Abstract

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An image not subjected to color correction, gamma correction, MTF correction and others is used as an image to be subjected to Retinex image processing. Thus, a RAW image prepared only by converting an electric signal of a CCD image sensor by an A/D converter into a digital form is used as an image to be subjected to the Retinex processing. Predetermined gamma correction is performed after the Retinex processing. Thereby, Retinex algorithm substantially modeling functions of a retina and a cortex of a living body exhibits its original performance. The resolution of the original image is lowered, and processing is performed on an image thus produced to produce a blurred image. Then, the resolution of the blurred image is restored to the same resolution as that of the original image, and the Retinex processing is performed. Thereby, the Retinex processing can be performed without increasing memory consumption and extremely lowering an operation speed.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MINOLTA CO., LTD.OSAKA2215

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Itoh, Tetsuya Okazaki, JP 33 336
Miyake, Yoichi Sakura, JP 14 247
Sakatani, Kazuomi Toyokawa, JP 39 369
Tsumura, Norimichi Chiba, JP 8 54

Cited Art Landscape

Patent Info (Count) # Cites Year
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
* 6,882,449 Space varying gamut mapping 9 2001
 
UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION (1)
5,991,456 Method of improving a digital image 238 1996
 
POLAROID CORPORATION (1)
4,384,336 Method and apparatus for lightness imaging 67 1980
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
BROTHER KOGYO KABUSHIKI KAISHA (11)
* 8,031,973 Data processing device capable of executing retinex processing at high speed 0 2007
* 7,920,752 Image processing device that quickly performs retinex process 5 2007
* 7,912,308 Image processing device that quickly performs retinex process 6 2007
* 2008/0044,099 IMAGE PROCESSING DEVICE THAT QUICKLY PERFORMS RETINEX PROCESS 1 2007
* 8,437,031 Image processing device and method for reducing an original image 0 2007
8,081,831 Image processor performing a high precision retinex process 1 2007
* 2008/0056,587 IMAGE PROCESSING DEVICE 0 2007
* 8,081,839 Image processor 3 2007
* 2008/0260,282 IMAGE PROCESSOR 1 2007
8,165,418 Image processor 1 2008
* 2008/0240,598 IMAGE PROCESSOR 48 2008
 
KABUSHIKI KAISHA TOSHIBA (2)
* 8,149,299 Apparatus and method for generating a picture having a high visibility 1 2008
* 2008/0239,090 PICTURE PROCESSING APPARATUS AND METHOD 3 2008
* Cited By Examiner

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