Patents by Inventor Manabu Ohga
Manabu Ohga 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: 10593026Abstract: An apparatus includes a first acquisition unit configured to, with a viewpoint set to a position of an object, acquire a plurality of environment maps for each position of light sources, the environment maps being obtained by imaging a surrounding environment from the viewpoint, a second acquisition unit configured to acquire a plurality of captured images for each position of the light sources, the captured images being obtained by imaging from a plurality of directions the object irradiated with light by the light sources, and a determination unit configured to determine reflection characteristics of the object based on the environment maps and the plurality of captured images.Type: GrantFiled: February 14, 2018Date of Patent: March 17, 2020Assignee: CANON KABUSHIKI KAISHAInventor: Manabu Ohga
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Publication number: 20180247393Abstract: An apparatus includes a first acquisition unit configured to, with a viewpoint set to a position of an object, acquire a plurality of environment maps for each position of light sources, the environment maps being obtained by imaging a surrounding environment from the viewpoint, a second acquisition unit configured to acquire a plurality of captured images for each position of the light sources, the captured images being obtained by imaging from a plurality of directions the object irradiated with light by the light sources, and a determination unit configured to determine reflection characteristics of the object based on the environment maps and the plurality of captured images.Type: ApplicationFiled: February 14, 2018Publication date: August 30, 2018Inventor: Manabu Ohga
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Patent number: 8493465Abstract: A color processing method which sets viewing conditions easily and properly from shooting conditions added to an image. Shot image data and shooting conditions of the image data are obtained. Input side viewing conditions from the obtained shooting conditions are set. The image data with a color appearance model based on the set input side viewing conditions are converted.Type: GrantFiled: August 2, 2011Date of Patent: July 23, 2013Assignee: Canon Kabushiki KaishaInventor: Manabu Ohga
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Patent number: 8411944Abstract: A spatial CAM forward conversion unit forward-converts XYZ data of the input side into JCh data based on input viewing condition parameters including parameters, which are used to determine field sizes of an input image based on the viewing angle. A Gamut mapping algorithm unit converts the JCh data into those in a color reproduction range of an output device by gamut mapping according to the color reproduction range of the output device. A spatial CAM inverse conversion unit inversely converts the JCh data in the color reproduction range of the output device into XYZ data of the output side based on output viewing condition parameters including parameters, which are used to determine field sizes of an output image based on the viewing angle.Type: GrantFiled: August 3, 2009Date of Patent: April 2, 2013Assignee: Canon Kabushiki KaishaInventor: Manabu Ohga
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Patent number: 8081819Abstract: In order to implement color matching with higher precision, a device that handles object colors and a device that handles light-source colors must be separately processed. Hence, when the device type is a device that handles light-source colors, control is made so as not to perform processing (forward color appearance model conversion and inverse color appearance model conversion) for converting colorimetric conditions of a colorimetric value file into viewing conditions. When the device type is a device that handles object colors, the processing for converting the colorimetric conditions of the colorimetric value file into the viewing conditions is performed, and a profile is created from the colorimetric values.Type: GrantFiled: June 8, 2006Date of Patent: December 20, 2011Assignee: Canon Kabushiki KaishaInventor: Manabu Ohga
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Publication number: 20110285870Abstract: A color processing method which sets viewing conditions easily and properly from shooting conditions added to an image. Shot image data and shooting conditions of the image data are obtained. Input side viewing conditions from the obtained shooting conditions are set. The image data with a color appearance model based on the set input side viewing conditions are converted.Type: ApplicationFiled: August 2, 2011Publication date: November 24, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Manabu OHGA
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Patent number: 8013903Abstract: A color processing method which sets viewing conditions easily and properly from shooting conditions added to an image. Shot image data and shooting conditions of the image data are obtained. Input side viewing conditions from the obtained shooting conditions are set. The image data with a color appearance model based on the set input side viewing conditions are converted.Type: GrantFiled: January 31, 2006Date of Patent: September 6, 2011Assignee: Canon Ksbushiki KaishaInventor: Manabu Ohga
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Patent number: 8014599Abstract: A color processing device performs a quantitative evaluation not influenced by the experience and sensitivity of a user, upon adjustment of a profile. The adjustment of first conversion data for converting device independent data included in a profile describing characteristics of a device into device dependent data is achieved by inputting sample data, which is the device independent data, converting the sample data into the device dependent data using the first conversion data, converting the converted device dependent data into the device independent data using second conversion data which is conversion data included in the profile and which is conversion data for converting the device dependent data into the device independent data, and calculating the color difference between the sample data and the device independent data.Type: GrantFiled: January 17, 2008Date of Patent: September 6, 2011Assignee: Canon Kabushiki KaishaInventors: Manabu Ohga, Kenichi Naito, Hayato Kubo
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Patent number: 7843600Abstract: In an information processing method, input color data indicating a plurality of color components including a black color component is converted into output color data that indicates a plurality of color components including a black color component. A relationship between lightness levels and simple black colors is determined for an output device based on the characteristics of the output device. When input color data indicates a simple black color, output color data for the simple black color having a lightness level equivalent to the lightness level of the input color data is determined based on the relationship between lightness levels and simple black colors.Type: GrantFiled: September 25, 2003Date of Patent: November 30, 2010Assignee: Canon Kabushiki KaishaInventor: Manabu Ohga
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Publication number: 20100046834Abstract: A spatial CAM forward conversion unit forward-converts XYZ data of the input side into JCh data based on input viewing condition parameters including parameters, which are used to determine field sizes of an input image based on the viewing angle. A Gamut mapping algorithm unit converts the JCh data into those in a color reproduction range of an output device by gamut mapping according to the color reproduction range of the output device. A spatial CAM inverse conversion unit inversely converts the JCh data in the color reproduction range of the output device into XYZ data of the output side based on output viewing condition parameters including parameters, which are used to determine field sizes of an output image based on the viewing angle.Type: ApplicationFiled: August 3, 2009Publication date: February 25, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Manabu Ohga
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Patent number: 7599553Abstract: When one viewing condition parameter is applied to all pixels, a visual effect between a single color and a background expressed on a rasterized image cannot be reflected on a color matching result. To prevent this, when color matching using a human color appearance model is to be performed, the distance between an image and a viewer and the resolution of the image are input. On the basis of the input distance and resolution, a stimulus region, adjacent region, and background region based on a plurality of field angles (e.g., 2°, 4°, and 10°) for a pixel of interest on the image are defined, thereby determining a viewing condition parameter and performing color matching.Type: GrantFiled: September 28, 2007Date of Patent: October 6, 2009Assignee: Canon Kabushiki KaishaInventor: Manabu Ohga
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Patent number: 7586657Abstract: To generate conversion data enabling to appropriately control a colorant amount, a profile for storing correspondence between device color data and a colorimetry value and control information for controlling a colorant amount is acquired, and inverse conversion data for converting device independent data into device dependent data is generated based on the correspondence between the device color data and the colorimetry value and the control information for controlling the colorant amount.Type: GrantFiled: February 14, 2006Date of Patent: September 8, 2009Assignee: Canon Kabushiki KaishaInventor: Manabu Ohga
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Patent number: 7557957Abstract: An image which has been color-converted in correspondence with the output characteristics of a printing press as a target for the purpose of proof may often be printed by a copying machine or printer. Prior to the proof, a generation history of a generated profile of an output device is preferably managed. The operator sets whether or not to save parameters (saving location and profile name) associated with saving of a file and colorimetric values, whether or not to save history management information, and the like.Type: GrantFiled: February 9, 2007Date of Patent: July 7, 2009Assignee: Canon Kabushiki KaishaInventors: Shuichi Kumada, Manabu Ohga, Kenichi Naito, Hayato Kubo
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Publication number: 20090052771Abstract: In order to implement color matching with higher precision, a device that handles object colors and a device that handles light-source colors must be separately processed. Hence, when the device type is a device that handles light-source colors, control is made so as not to perform processing (forward color appearance model conversion and inverse color appearance model conversion) for converting calorimetric conditions of a calorimetric value file into viewing conditions. When the device type is a device that handles object colors, the processing for converting the calorimetric conditions of the calorimetric value file into the viewing conditions is performed, and a profile is created from the calorimetric values.Type: ApplicationFiled: June 8, 2006Publication date: February 26, 2009Applicant: CANON KABKUSHIKI KAISHAInventor: Manabu Ohga
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Publication number: 20080158579Abstract: An object of the present invention is to make it possible to perform a quantitative evaluation not influenced by experience and sensitivity of a user, upon adjustment of a profile. The adjustment of first conversion data for converting device independent data included in a profile describing characteristics of a device into device dependent data is achieved by inputting sample data which is the device independent data, converting the sample data into the device dependent data using the first conversion data, converting the converted device dependent data into the device independent data using second conversion data which is conversion data included in the profile and which is conversion data for converting the device dependent data into the device independent data, and calculating a color difference between the sample data and the device independent data.Type: ApplicationFiled: January 17, 2008Publication date: July 3, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Manabu Ohga, Kenichi Naito, Hayato Kubo
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Patent number: 7385739Abstract: In some cases, an image that has undergone color conversion in correspondence with the output characteristics of a printing press as a target is printed using a copying machine or printer for the purpose of proof. Prior to such proof, an output device profile is generated. In this case, it is desired to easily confirm and tune the generated profile. According to this invention, tuning images to be proofed and chart images before and after color conversion are parallelly displayed as independent windows. An arbitrary color range to be tuned is selected on one of these windows, a tuning parameter is set for the selected color range, and a color conversion condition is tuned based on the tuning parameter.Type: GrantFiled: September 11, 2002Date of Patent: June 10, 2008Assignee: Canon Kabushiki KaishaInventors: Manabu Ohga, Kenichi Naito, Hayato Kubo
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Patent number: 7339700Abstract: The invention makes it possible to perform a quantitative evaluation not influenced by experience and sensitivity of a user, upon adjustment of a profile. The adjustment of first conversion data, for converting device independent data included in a profile describing characteristics of a device into device dependent data, is achieved by inputting sample data which is the device independent data, converting the sample data into the device dependent data using the first conversion data, converting the converted device dependent data into the device independent data using second conversion data which is conversion data included in the profile and which is conversion data for converting the device dependent data into the device independent data, and calculating a color difference between the sample data and the device independent data.Type: GrantFiled: September 13, 2002Date of Patent: March 4, 2008Assignee: Canon Kabushiki KaishaInventors: Manabu Ohga, Kenichi Naito, Hayato Kubo
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Publication number: 20080025601Abstract: When one viewing condition parameter is applied to all pixels, a visual effect between a single color and a background expressed on a rasterized image cannot be reflected on a color matching result. To prevent this, when color matching using a human color appearance model is to be performed, the distance between an image and a viewer and the resolution of the image are input. On the basis of the input distance and resolution, a stimulus region, adjacent region, and background region based on a plurality of field angles (e.g., 2°, 4°, and 10°) for a pixel of interest on the image are defined, thereby determining a viewing condition parameter and performing color matching.Type: ApplicationFiled: September 28, 2007Publication date: January 31, 2008Applicant: Canon kabkushiki kaishaInventor: MANABU OHGA
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Patent number: 7295705Abstract: When one viewing condition parameter is applied to all pixels, a visual effect between a single color and a background expressed on a rasterized image cannot be reflected on a color matching result. To prevent this, when color matching using a human color appearance model is to be performed, the distance between an image and a viewer and the resolution of the image are input. On the basis of the input distance and resolution, a stimulus region, adjacent region, and background region based on a plurality of field angles (e.g., 2°, 4°, and 10°) for a pixel of interest on the image are defined, thereby determining a viewing condition parameter and performing color matching.Type: GrantFiled: December 2, 2004Date of Patent: November 13, 2007Assignee: Canon Kabushiki KaishaInventor: Manabu Ohga
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Publication number: 20070236759Abstract: To generate conversion data enabling to appropriately control a colorant amount, a profile for storing correspondence between device color data and a colorimetry value and control information for controlling a colorant amount is acquired, and inverse conversion data for converting device independent data into device dependent data is generated based on the correspondence between the device color data and the colorimetry value and the control information for controlling the colorant amount.Type: ApplicationFiled: February 14, 2006Publication date: October 11, 2007Applicant: CANON KABUSHKI KAISHAInventor: Manabu Ohga