Patents by Inventor Johji Tajima
Johji Tajima 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: 9083913Abstract: Provided is an image processing method wherein an edge is detected from an image to which a sharpening process is to be applied, and on the basis of a length of the edge which is present near a pixel to which the sharpening process is to be applied, the strength of the sharpening process to the pixel is determined.Type: GrantFiled: August 6, 2010Date of Patent: July 14, 2015Assignee: NEC CORPORATIONInventors: Masato Tsukada, Johji Tajima
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Publication number: 20120155762Abstract: Provided is an image processing method wherein an edge is detected from an image to which a sharpening process is to be applied, and on the basis of a length of the edge which is present near a pixel to which the sharpening process is to be applied, the strength of the sharpening process to the pixel is determined.Type: ApplicationFiled: August 6, 2010Publication date: June 21, 2012Applicant: NEC CORPORATIONInventors: Masato Tsukada, Johji Tajima
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Patent number: 7339596Abstract: By using a spectral reflectance of a projection plane or color information under a light source, which is stored in wall color storage means 4, matrix calculation means 5 calculates a conversion matrix, and mixing amounts R, G, B of primary colors of an input image are converted into corrected mixing amounts R?, G?, B?, and they are projected by means of a projector. Thereby, even in a case where a wall is colored, correct color reproduction is made in a colorimetric manner.Type: GrantFiled: May 13, 2003Date of Patent: March 4, 2008Assignee: NEC CorporationInventor: Johji Tajima
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Patent number: 7177450Abstract: An enquiry face image shot by a video camera and the like is collated with face image data converted into database. The data converted into the database are three-dimensional shape data of surfaces of faces and color image data. Shooting conditions (an angle and lighting directions) of the enquiry image are supplied to the data, and thereby a color image of each person's face from the database in accordance with the shooting conditions is generated. By comparing the color image with the enquiry image, the collation is implemented.Type: GrantFiled: March 27, 2001Date of Patent: February 13, 2007Assignee: NEC CorporationInventor: Johji Tajima
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Patent number: 7055958Abstract: An image projection device includes a distance measuring device which determines a screen distance between the image projection device and a screen. An image sensor captures a shape of the screen and a screen detector detects a sensor-view shape of the screen from the captured image of the screen. The sensor-view shape of the screen is transformed to a projector-view shape of the screen by a coordinate transformer based on the screen distance. A controller modifies an image to be projected so as to fit it to the projector-view shape of the screen. The modified image is projected on the screen.Type: GrantFiled: August 20, 2004Date of Patent: June 6, 2006Assignee: NEC CorporationInventor: Johji Tajima
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Patent number: 6928231Abstract: A method and a system for video recording, in which scenes desired by a user can be recorded, are provided. Even at a case that the user sets the starting time and the ending time of a program beforehand and its broadcasting time is changed, and at a case that the user does not know the contents of the program in detail, the program or the scenes desired by the user can be recorded by the method and the system.Type: GrantFiled: April 2, 2001Date of Patent: August 9, 2005Assignee: NEC CorporationInventor: Johji Tajima
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Publication number: 20050041217Abstract: An image projection device includes a distance measuring device which determines a screendistance between the image projection device and a screen. An image sensor captures a shape of the screen and a screen detector detects a sensor-view shape of the screen from the captured image of the screen. The sensor-view shape of the screen is transformed to a projector-view shape of the screen by a coordinate transformer based on the screen distance. A controller modifies an image to be projected so as to fit it to the projector-view shape of the screen. The modified image is projected on the screen.Type: ApplicationFiled: August 20, 2004Publication date: February 24, 2005Inventor: Johji Tajima
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Patent number: 6678407Abstract: A method and a device of light source discrimination, skin color correction, and color image correction, and storage medium thereof capable of being read by a computer always enable reproducibility, of color to be maintained highly regardless of difference of light source. There is calculated color distribution of portion of a face or skin in image by color distribution calculation section. There is compared the color distribution with distribution of skin color taken photograph under respective light sources stored in reference color distribution storage section. A light source discrimination section discriminates the light source at the time of taking photograph. There is corrected color by converting color under the light source of candidate substance into a corresponding color under standard light source.Type: GrantFiled: March 31, 1999Date of Patent: January 13, 2004Assignee: NEC CorporationInventor: Johji Tajima
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Publication number: 20030214510Abstract: By using a spectral reflectance of a projection plane or color information under a light source, which is stored in wall color storage means 4, matrix calculation means 5 calculates a conversion matrix, and mixing amounts R, G, B of primary colors of an input image are converted into corrected mixing amounts R′, G′, B′, and they are projected by means of a projector. Thereby, even in a case where a wall is colored, correct color reproduction is made in a colorimetric manner.Type: ApplicationFiled: May 13, 2003Publication date: November 20, 2003Applicant: NEC CorporationInventor: Johji Tajima
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Patent number: 6326974Abstract: A coloring support apparatus comprises a table storage section to store a coloring table having an emphasis column for describing the degree of color emphasis of a domain in a linear graphic image to be colored, and a color coordinate column for describing a color coordinate value in any color space in the domain to be colored for each image element constituting the linear graphic image, a whole color tone column for describing the impression of coloring; a color number determination section for determining the number of colors according to the coloring table; a hue determination section for determining hue values according to the number of colors obtained by the color number determination section; a reference coordinate determination section for determining the tone, saturation and brightness of a color corresponding to the impression of coloring described in the whole color tone column; a color generation section for determining the saturation and brightness values of the hue of colors according to coordinaType: GrantFiled: March 30, 1999Date of Patent: December 4, 2001Assignee: NEC CorporationInventors: Youichi Satoh, Johji Tajima
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Publication number: 20010031073Abstract: An enquiry face image shot by a video camera and the like is collated with face image data converted into database. The data converted into the database are three-dimensional shape data of surfaces of faces and color image data. Shooting conditions (an angle and lighting directions) of the enquiry image are supplied to the data, and thereby a color image of each person's face from the database in accordance with the shooting conditions is generated. By comparing the color image with the enquiry image, the collation is implemented.Type: ApplicationFiled: March 27, 2001Publication date: October 18, 2001Inventor: Johji Tajima
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Publication number: 20010031129Abstract: A method and a system for video recording, in which scenes desired by a user can be recorded, are provided. Even at a case that the user sets the starting time and the ending time of a program beforehand and its broadcasting time is changed, and at a case that the user does not know the contents of the program in detail, the program or the scenes desired by the user can be recorded by the method and the system.Type: ApplicationFiled: April 2, 2001Publication date: October 18, 2001Inventor: Johji Tajima
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Patent number: 6035075Abstract: In an image deforming method and an image deforming apparatus, a portion of an input image is geometrically deformed to be outputted therefrom. Input and output image buffers keep input and output image data items, respectively. An image deforming method and a partial deformation region are specified in an image deformation specification unit. For each pixel of the output image, a before-deformation coordinate value calculating section calculates coordinate values thereof before the deformation. A shift calculating section calculates a coordinate shift amount expressing a quantity of shift for each pixel of the output image between coordinate values of the pixel and those of the pixel before the deformation, and the coordinate shift amount is stored in a pixel reallocation map storage in the form of a pixel reallocation map.Type: GrantFiled: April 9, 1998Date of Patent: March 7, 2000Assignee: NEC CorporationInventors: Akira Inoue, Johji Tajima, Yoichi Sato
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Patent number: 5943059Abstract: A coloring support apparatus comprises a table storage section to store a coloring table having an emphasis column for describing the degree of color emphasis of a domain in a linear graphic image to be colored, and a color coordinate column for describing a color coordinate value in any color space in the domain to be colored for each image element constituting the linear graphic image, a whole color tone column for describing the impression of coloring; a color number determination section for determining the number of colors according to the coloring table; a hue determination section for determining hue values according to the number of colors obtained by the color number determination section; a reference coordinate determination section for determining the tone, saturation and brightness of a color corresponding to the impression of coloring described in the whole color tone column; a color generation section for determining the saturation and brightness values of the hue of colors according to coordinaType: GrantFiled: August 4, 1995Date of Patent: August 24, 1999Assignee: NEC CorporationInventors: Youichi Satoh, Johji Tajima
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Patent number: 5200792Abstract: For obtaining distance information between an image pickup device (10) and an object (11) illuminated by a monochromatic beam selected by a diffraction grating (18) from an optical beam generated by an optical beam generator (27), a distance information obtaining device comprises an activating device (33) for simultaneously activating the beam generator and the image pickup device a predetermined time duration so that the optical beam generator generates an optical beam while activated and so that the image pickup device picks up an optical image of the object to produce a picture signal while activated. A processing unit (21) processes the picture signal into a processed signal representative of the distance information. The optical beam may have an intensity which is higher that that of environmental light of the object. The predetermined time duration may be an instantaneous time duration. The beam generator may generate a flash of light as the optical beam.Type: GrantFiled: March 19, 1992Date of Patent: April 6, 1993Assignee: NEC CorporationInventors: Johji Tajima, Shizuo Sakamoto
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Patent number: 4864395Abstract: In a distance information obtaining device comprising an image pickup device (10) for picking up an optical image of an object to produce a picture signal, and a signal processing unit (18) for processing the picture signal to produce a processed signal representative of distance information between the image pickup device and each point of the object, the signal processing unit produces a reference signal by using a reference picture signal derived from the image pickup device on a preliminary process. Responsive to the reference signal, a preliminary processing unit (26) preliminarily processes the reference signal to produce a preliminary processed signal as a calibration signal. In a measuring process, the signal processing unit processes the picture signal with reference to the preliminary processed signal.Type: GrantFiled: August 8, 1988Date of Patent: September 5, 1989Assignee: NEC CorporationInventor: Johji Tajima