Patents by Inventor Kenro Ohsawa
Kenro Ohsawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7511715Abstract: A display apparatus includes a color image projection unit and a screen. The color image projection unit includes a converter which receives image signals of three primary colors, and converts the received image signals of three primary colors into image signals of four or more primary colors, and a color image projector which includes a plurality of image projection devices having respective primary colors, and which receives the image signals of four or more primary colors, and projects the received image signals of four or more primary colors onto the screen. The color image projector is capable of physically adjusting positions of the image signals of four or more primary colors, which are projected onto the screen such that the positions of the image signals are coincident with each other.Type: GrantFiled: March 3, 2005Date of Patent: March 31, 2009Assignee: Olympus Optical Co., Ltd.Inventors: Kenro Ohsawa, Nagaaki Ohyama, Masahiro Yamaguchi, Takeyuki Ajito
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Patent number: 7450158Abstract: A spectrum and color reproduction system has a multi-band camera (1), a six-primary-color display (3), and an image converting device (2) which converts a 16-band photographing signal from the multi-band camera (1) into a 6-primary-color display signal of the six-primary-color display (3) by using an input profile of the multi-band camera (1) and an output profile and a color spatial converting profile of the six-primary-color display (3). The input profile and the output profile have information on a corresponding relationship between the respective color signals and one of a spectrum and a spectral reflectance, and the color spatial converting profile has one of a color matching function and an illumination-light spectrum which prescribes a reflection spectrum for the spectral reflectance.Type: GrantFiled: October 22, 2002Date of Patent: November 11, 2008Assignee: National Institute of Information and Communications TechnologyInventors: Kenro Ohsawa, Hideto Motomura
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Patent number: 7408573Abstract: A color reproduction system has a color image input section, and a color correcting section for correcting colors of a subject image obtained by photographing a subject by the color image input section. The color correcting section corrects colors by changing over a plurality of color correction parameters according to a subject image signal from the color image input section.Type: GrantFiled: January 9, 2006Date of Patent: August 5, 2008Assignee: Olympus CorporationInventors: Kensuke Ishii, Kenro Ohsawa
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Publication number: 20060238832Abstract: A display system according to an embodiment of the present invention includes: a color image display device for displaying a color image; and an image correction device for producing corrected color image data to be outputted to the color image display device by correcting color image data. In the display system, the image correction device calculates the corrected color image data from the color image data so as to correct optical flare of the color image display device on the basis of relationship(s) between one of a plurality of test color image data outputted to the color image display device and the spatial distribution of display colors of a test color image that has been displayed on the color image display device in accordance with the one of the plurality of test color image data.Type: ApplicationFiled: June 21, 2006Publication date: October 26, 2006Applicants: National Institute of Information & Communications Technology, Incorporatted Adminstrative Agency, Olympus CorporationInventor: Kenro Ohsawa
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Publication number: 20060109351Abstract: A color reproduction system has a color image input section, and a color correcting section for correcting colors of a subject image obtained by photographing a subject by the color image input section. The color correcting section corrects colors by changing over a plurality of color correction parameters according to a subject image signal from the color image input section.Type: ApplicationFiled: January 9, 2006Publication date: May 25, 2006Inventors: Kensuke Ishii, Kenro Ohsawa
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Patent number: 7020331Abstract: A color reproducing system includes a color image input section. A color image processing device has an image processing section for performing a predetermined processing on color image data input through the color image input section. A storage section stores therein the color image data which has been input through the color image input section. A color image output section outputs the color image data which has been stored in the storage section. The color image processing device further includes a processing selection section for performing selection about whether or not the predetermined processing is performed on the color image data input through the color image input section.Type: GrantFiled: July 6, 2004Date of Patent: March 28, 2006Assignee: Olympus CorporationInventors: Haruko Saikawa, Kensuke Ishii, Yasuhiro Komiya, Kenro Ohsawa, Toru Wada
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Patent number: 7009640Abstract: A color reproduction system has a color image input section, and a color correcting section for correcting colors of a subject image obtained by photographing a subject by the color image input section. The color correcting section corrects colors by changing over a plurality of color correction parameters according to a subject image signal from the color image input section.Type: GrantFiled: May 31, 2000Date of Patent: March 7, 2006Assignee: Olympus CorporationInventors: Kensuke Ishii, Kenro Ohsawa
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Patent number: 6980231Abstract: A color reproduction system includes a tristimulus value calculation unit for calculating tristimulus values (X, Y, Z) under observation illumination light corresponding to the spectral reflectance of an object, which is obtained by a spectral reflectance calculation unit, and a color image signal calculation unit for calculating output color image signals (R?, G?, B?) to a CRT monitor on the basis of the tristimulus values (X, Y, Z). The tristimulus value calculation unit converts spectral reflectance image data (F) of the object into tristimulus value image data (X, Y, Z) under the observation illumination light using the spectral reflectance data of a color chip formed from a plurality of unit color chips, color chip image data (P?) obtained by sensing the color chip with a digital camera under the observation illumination light, spectral sensitivity data of the digital camera, and color matching function data.Type: GrantFiled: May 24, 2000Date of Patent: December 27, 2005Assignee: Olympus CorporationInventor: Kenro Ohsawa
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Publication number: 20050271299Abstract: An image transforming device wherein one input image or a plurality of input images captured or created under different condition are geometrically transformed to create an output image, including: an input geometrical profile calculating section to calculate an input geometrical profile directing to a coordinate relation between pixel positions of the input image and polar coordinate positions of the input image in view of a given observing position; an output geometrical profile calculating section to calculate an output geometrical profile directing to a coordinate relation between pixel positions of the output image and polar coordinate positions of the output image in view of the observing position; and geometrical transforming section to geometrically transform the input image on the input geometrical profile and the output geometrical profile, thereby calculating the output image.Type: ApplicationFiled: May 31, 2005Publication date: December 8, 2005Applicant: Olympus CorporationInventors: Takeyuki Ajito, Kenro Ohsawa, Takanori Ishizawa
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Publication number: 20050162572Abstract: A display apparatus includes a color image projection unit and a screen. The color image projection unit includes a converter which receives image signals of three primary colors, and converts the received image signals of three primary colors into image signals of four or more primary colors, and a color image projector which includes a plurality of image projection devices having respective primary colors, and which receives the image signals of four or more primary colors, and projects the received image signals of four or more primary colors onto the screen. The color image projector is capable of physically adjusting positions of the image signals of four or more primary colors, which are projected onto the screen such that the positions of the image signals are coincident with each other.Type: ApplicationFiled: March 3, 2005Publication date: July 28, 2005Applicant: Olympus Optical Co., Ltd.Inventors: Kenro Ohsawa, Nagaaki Ohyama, Masahiro Yamaguchi, Takeyuki Ajito
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Patent number: 6873339Abstract: A color reproduction system includes a color image display unit capable of displaying a color image of four or more primary colors, and a color converting unit for converting input three-primary color signals into color image signals of respective primary colors of the color image display unit. The color converting unit includes an area deciding section that decides a color conversion area to which the input three-primary color signals belong in a three-dimensional color space, and a color image signal calculating section that converts the input three primary color signals into color image signals of respective primary colors based on color conversion parameters corresponding to a color conversion area decided by the area deciding section.Type: GrantFiled: June 19, 2003Date of Patent: March 29, 2005Assignee: Olympus Optical Co., Ltd.Inventors: Kenro Ohsawa, Nagaaki Ohyama, Masahiro Yamaguchi, Takeyuki Ajito
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Patent number: 6856354Abstract: This invention includes an RGB color camera for photographing an object under photographing illumination light, a simplified spectrophotometer for measuring a photographing illumination light spectrum, and a color correction device for calculating tristimulus value data of the object and converting the data into an input signal to a CRT monitor by using monitor profile data. On the observation side, a CRT monitor and illumination light colorimeter for measuring the tristimulus values of observation illumination light are arranged. A color correction device can perform color reproduction without being influenced by changes in the color perception characteristics of a person such as chromatic adaptation by reproducing a virtual illumination light spectrum having tristimulus values equal to those of the observation illumination light without measuring any observation illumination light spectrum.Type: GrantFiled: November 10, 1999Date of Patent: February 15, 2005Assignee: Olympus Optical Co., Ltd.Inventor: Kenro Ohsawa
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Publication number: 20040263638Abstract: In a color reproduction system, under constraint conditions where colorimetric values of a subject spectrum, calculated by a colorimetric-value calculation unit (21), match colorimetric values of a display spectrum of a six-primary-color display (3), a signal calculation unit (22) calculates display signals such that squared errors between the subject spectrum and the display spectrum are minimized within the gamut of the remaining degree of freedom by using Lagrange's method of undetermined coefficients or the reduced gradient method.Type: ApplicationFiled: April 21, 2004Publication date: December 30, 2004Applicants: Telecommunications Advancement Organization of Japan, Olympus CorporationInventors: Kenro Ohsawa, Masahiro Yamaguchi, Nagaaki Ohyama
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Publication number: 20040257447Abstract: A color image reproduction system includes: a six-band camera (1) for generating a color video signal; a six-primary-color display (3) for receiving display-signal video data to display an image; and a video converter (2) for converting the color video signal into the display-signal video data using an input profile of the six-band camera (1) and an output profile of the six-primary-color display (3). An input profile assembly of the six-band camera (1) and an output profile assembly of the six-primary-color display (3) each include profile data corresponding to respective frames of an image.Type: ApplicationFiled: April 12, 2004Publication date: December 23, 2004Applicant: Telecommunications Advancement Organization of JapanInventors: Kenro Ohsawa, Hideto Motomura
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Publication number: 20040246345Abstract: A spectrum and color reproduction system has a multi-band camera (1), a six-primary-color display (3), and an image converting device (2) which converts a 16-band photographing signal from the multi-band camera (1) into a 6-primary-color display signal of the six-primary-color display (3) by using an input profile of the multi-band camera (1) and an output profile and a color spatial converting profile of the six-primary-color display (3). The input profile and the output profile have information on a corresponding relationship between the respective color signals and one of a spectrum and a spectral reflectance, and the color spatial converting profile has one of a color matching function and an illumination-light spectrum which prescribes a reflection spectrum for the spectral reflectance.Type: ApplicationFiled: April 12, 2004Publication date: December 9, 2004Inventors: Kenro Ohsawa, Hideto Motomura
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Publication number: 20040240728Abstract: A color reproducing system includes a color image input section. A color image processing device has an image processing section for performing a predetermined processing on color image data input through the color image input section. A storage section stores therein the color image data which has been input through the color image input section. A color image output section outputs the color image data which has been stored in the storage section. The color image processing device further includes a processing selection section for performing selection about whether or not the predetermined processing is performed on the color image data input through the color image input section.Type: ApplicationFiled: July 6, 2004Publication date: December 2, 2004Inventors: Haruko Saikawa, Kensuke Ishii, Yasuhiro Komiya, Kenro Ohsawa, Toru Wada
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Publication number: 20040233213Abstract: An image data conversion apparatus includes color correction units for correcting the difference in color reproduction characteristic between projectors, bias correction units for correcting the bias so as to display partial color images on a predetermined set bias, data distribution units for distributing image data to display, at a predetermined ratio, the partial color images contained in the overlap region between the partial color images, and nonuniformity correction units for correcting color nonuniformities in the partial color images.Type: ApplicationFiled: December 17, 2003Publication date: November 25, 2004Inventor: Kenro Ohsawa
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Patent number: 6766050Abstract: A color reproducing system includes a color image input section. A color image processing device has an image processing section for performing a predetermined processing on color image data input through the color image input section. A storage section stores therein the color image data which has been input through the color image input section. A color image output section outputs the color image data which has been stored in the storage section. The color image processing device further includes a processing selection section for performing selection about whether or not the predetermined processing is performed on the color image data input through the color image input section.Type: GrantFiled: August 1, 2000Date of Patent: July 20, 2004Assignee: Olympus CorporationInventors: Haruko Saikawa, Kensuke Ishii, Yasuhiro Komiya, Kenro Ohsawa, Toru Wada
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Publication number: 20030214499Abstract: A color reproduction system includes a color image display unit capable of displaying a color image of four or more primary colors, and a color converting unit for converting input three-primary color signals into color image signals of respective primary colors of the color image display unit. The color converting unit includes an area deciding section that decides a color conversion area to which the input three-primary color signals belong in a three-dimensional color space, and a color image signal calculating section that converts the input three primary color signals into color image signals of respective primary colors based on color conversion parameters corresponding to a color conversion area decided by the area deciding section.Type: ApplicationFiled: June 19, 2003Publication date: November 20, 2003Applicant: OLYMPUS OPTICAL CO., LTD.Inventors: Kenro Ohsawa, Nagaaki Ohyama, Masahiro Yamaguchi, Takeyuki Ajito
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Patent number: 6633302Abstract: A color reproduction system includes a color image display unit capable of displaying a color image of four or more primary colors, and a color converting unit for converting input three-primary color signals into color image signals of respective primary colors of the color image display unit. The color converting unit includes an area deciding section that decides a color conversion area to which the input three-primary color signals belong in a three-dimensional color space, and a color image signal calculating section that converts the input three-primary color signals into color image signals of respective primary colors based on color conversion parameters corresponding to a color conversion area decided by the area deciding section.Type: GrantFiled: May 24, 2000Date of Patent: October 14, 2003Assignee: Olympus Optical Co., Ltd.Inventors: Kenro Ohsawa, Nagaaki Ohyama, Masahiro Yamaguchi, Takeyuki Ajito