Patent
Rapid color recognition method
Chien Chien-Chia,Cheng Chia-Pao,Chen Li-Meng +2 more
- 02 Aug 2004
19
TL;DR: In this paper, a color recognition method is presented, where an area for representing a color of the pixel is identified according to the basic color component data of the pixels, and then the color code is outputted according to a predetermined color classification table of the area.
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Abstract: A rapid color recognition method is provided. In the method, an area for representing a color of the pixel is identified according to the basic color component data of the pixel, and then the color code is outputted according to a predetermined color classification table of the area. In the method, since an isosceles right triangle plane is provided by extending and scaling the regular triangle plane by using one side of the regular triangle plane as a base, wherein the regular triangle plane is provided by normalizing the basic color component data. Therefore, the basic color component data is normalized without division operation, and thus the complexity of the operation of the color recognition is reduced.
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Patent
Color converting apparatus for performing a three-dimensional color conversion of a colored picture in a color space with a small capacity of memory
Katsuhiro Kanamori,Osamu Yamada,Hideto Motomura,Rika Hashimoto,Teruo Fumoto,Hiroaki Kotera +5 more
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TL;DR: In this paper, a color converting apparatus is provided with a table memory for storing pieces of color converting data defined in an output color space at color converting addresses, and a signal receiving section for receiving three signals designated an input color in a lightness-color difference space.
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Patent
Color discrimination apparatus and method
Daisaku Horie,Noriyuki Okisu +1 more
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TL;DR: In this paper, a color discriminating apparatus is provided with a luminance calculator for calculating luminance information of a picked up color image based on image data of each of a plurality of color components constituting the color image.
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Patent
Method and apparatus for determining a gamut boundary and a gamut descriptor
Shijie J. Wan
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TL;DR: In this article, a table called a gamut descriptor is proposed to represent the gamut boundary surface in a device independent color space (DICS) by a set of small triangles.
42
Patent
Image processing method, image processing apparatus, and programs thereof
Kazuhiro Saito,Makoto Torigoe,Yoshiko Iida,Tetsuya Suwa +3 more
- 12 Jul 2001
TL;DR: In this article, a maximum line in the color reproduction region of the image formation apparatus is defined, internal lines in the colour reproduction region are defined and the tables are created by performing interpolation processing on the basis of the maximum line and the internal lines.
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Patent
Method of normalizing color information, method of exchanging color information using the same method and device using the same methods
Hideto Motomura
- 13 Nov 2000
TL;DR: In this article, a method of exchanging color-information includes the steps of: (1) grouping color spaces of a source device and an output device; (2) calculating gravity vectors and gravity points of each color category grouped in respective devices; (3) producing a color space normalized by using gravity vectors calculated for each colour category of respective devices and variance covariance matrix expressing an extension from the gravity point as a center; (4) mapping control points of corresponding color category provided in respective normalized color spaces; and (5) exchanging color information by finding an agreement between the color
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