Patents by Inventor Takashi Itow
Takashi Itow 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: 8154628Abstract: An image processing apparatus (5) that corrects an input image signal (Xin) pixel by pixel to generate a corrected image signal (Xout), having a filtering means (2) that determines a luminance distribution of a pixel to be corrected and pixels neighboring the pixel to be corrected, a correction gain calculation means (3) that determines the correction gain of the pixel to be corrected, and an operation means (4) that uses the correction gain determined by the correction gain calculation means to perform an operation on the input image signal pixel by pixel. With this simple configuration, the dynamic range of the input image can be appropriately improved.Type: GrantFiled: August 14, 2007Date of Patent: April 10, 2012Assignee: Mitsubishi Electric CorporationInventors: Kozo Ishida, Tetsuya Kuno, Takashi Itow, Shotaro Moriya
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Patent number: 7936817Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: GrantFiled: October 30, 2007Date of Patent: May 3, 2011Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 7760442Abstract: The present invention provides a control device capable of improving hysteresis characteristics of a voice coil motor (31) and attaining a suitable lens position without complicating the structure of the control device. As solving means of the invention, a voice coil motor control device (30) includes a driving current control part (34) that controls a driving current supplied to the voice coil motor (31) in accordance with a driving pulse subjected to pulse width modulation, and a driving pulse control part (32) that divides a drive period of the voice coil motor (31) into a movement period and a holding period, and controls the driving pulse by changing the duty ratio of the driving pulse during the movement period in accordance with a duty setting value and fixing the duty ratio of the driving pulse during the holding period to the duty setting value.Type: GrantFiled: October 25, 2005Date of Patent: July 20, 2010Assignee: Mitsubishi Electric CorporationInventors: Kozo Ishida, Atsushi Michimori, Noriyuki Komori, Hideki Kunishio, Hiroaki Sugiura, Takashi Itow, Tetsuya Kuno
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Patent number: 7756202Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: GrantFiled: October 30, 2007Date of Patent: July 13, 2010Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 7719575Abstract: A regression analysis is carried out (8) using pixel signals having a K-th spectral characteristic as the explanatory variable and pixel signals having an L-th spectral characteristic as the purpose variable in a plurality of pixel positions in an area neighboring a pixel of interest to obtain a pixel signal having the L-th spectral characteristic (9). Pixel signals obtained by low-pass filtering (7a-7c) of the output signals of an imaging device may be used as the explanatory variable and the purpose variable. The occurrence of false colors is thereby reduced when, in a group of pixel signals from pixels arrayed on a two-dimensional plane, each pixel having one of a plurality of spectral characteristics, the missing colors at each pixel position are obtained by interpolation.Type: GrantFiled: December 10, 2004Date of Patent: May 18, 2010Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Junko Makita, Shoutarou Moriya, Hiroaki Sugiura, Koichi Yamashita, Takashi Itow, Tetsuya Kuno
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Patent number: 7688892Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: GrantFiled: October 30, 2007Date of Patent: March 30, 2010Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 7663668Abstract: An imaging device has color signal generating means (20) for outputting first color signals (R5, G5, B5) corresponding to incident light, and matrix operation means (67) for performing a matrix calculation including multiplication of the first color signals, color signals obtained by raising the first color signals to a power with a first constant (i) as an exponent, color signals obtained by raising the first color signals to a power with a second constant (j) as an exponent, and corresponding matrix coefficients to obtain second color signals (R6, G6, B6). The first and second constants and the matrix coefficients are determined so that the total characteristics of the color signal generating means and the spectral sensitivity characteristic correction means (6) approximate human chromatic curves or spectral sensitivity curves obtained by a linear transformation thereof.Type: GrantFiled: January 14, 2005Date of Patent: February 16, 2010Assignee: Mitsubishi Electric CorporationInventors: Tetsuya Kuno, Hiroaki Sugiura, Takashi Itow, Koichi Yamashita, Katsutoshi Sugiyama
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Publication number: 20100020205Abstract: An image processing apparatus (5) that corrects an input image signal (Xin) pixel by pixel to generate a corrected image signal (Xout), having a filtering means (2) that determines a luminance distribution of a pixel to be corrected and pixels neighboring the pixel to be corrected, a correction gain calculation means (3) that determines the correction gain of the pixel to be corrected, and an operation means (4) that uses the correction gain determined by the correction gain calculation means to perform an operation on the input image signal pixel by pixel. With this simple configuration, the dynamic range of the input image can be appropriately improved.Type: ApplicationFiled: August 14, 2007Publication date: January 28, 2010Inventors: Kozo Ishida, Tetsuya Kuno, Takashi Itow, Shotaro Moriya
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Publication number: 20080278592Abstract: An imaging device has color signal generating means (20) for outputting first color signals (R5, G5, B5) corresponding to incident light, and matrix operation means (67) for performing a matrix calculation including multiplication of the first color signals, color signals obtained by raising the first color signals to a power with a first constant (i) as an exponent, color signals obtained by raising the first color signals to a power with a second constant (j) as an exponent, and corresponding matrix coefficients to obtain second color signals (R6, G6, B6). The first and second constants and the matrix coefficients are determined so that the total characteristics of the color signal generating means and the spectral sensitivity characteristic correction means (6) approximate human chromatic curves or spectral sensitivity curves obtained by a linear transformation thereof.Type: ApplicationFiled: January 14, 2005Publication date: November 13, 2008Applicant: Mitsubishi Electric CorporationInventors: Tetsuya Kuno, Hiroaki Sugiura, Takashi Itow, Koichi Yamashita, Katsutoshi Sugiyama
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Publication number: 20080130134Abstract: The present invention provides a control device capable of improving hysteresis characteristics of a voice coil motor (31) and attaining a suitable lens position without complicating the structure of the control device. As solving means of the invention, a voice coil motor control device (30) includes a driving current control part (34) that controls a driving current supplied to the voice coil motor (31) in accordance with a driving pulse subjected to pulse width modulation, and a driving pulse control part (32) that divides a drive period of the voice coil motor (31) into a movement period and a holding period, and controls the driving pulse by changing the duty ratio of the driving pulse during the movement period in accordance with a duty setting value and fixing the duty ratio of the driving pulse during the holding period to the duty setting value.Type: ApplicationFiled: October 25, 2005Publication date: June 5, 2008Inventors: Kozo Ishida, Atsushi Michimori, Noriyuki Komori, Hideki Kunishio, Hiroaki Sugiura, Takashi Itow, Tetsuya Kuno
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Publication number: 20080123746Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: ApplicationFiled: October 30, 2007Publication date: May 29, 2008Inventors: Tomohiro UEDA, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 7376184Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: GrantFiled: November 4, 2002Date of Patent: May 20, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Publication number: 20080112482Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: ApplicationFiled: October 30, 2007Publication date: May 15, 2008Inventors: Tomohiro UEDA, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 7362805Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: GrantFiled: March 2, 2006Date of Patent: April 22, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Publication number: 20080069208Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: ApplicationFiled: October 30, 2007Publication date: March 20, 2008Inventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Publication number: 20080069224Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: ApplicationFiled: October 30, 2007Publication date: March 20, 2008Inventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 7336708Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: GrantFiled: February 25, 2003Date of Patent: February 26, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 7324147Abstract: An imaging system controller (5) outputs a control signal (VC). The control signal (VC) gives a command to output driving clocks (?Vn, ?Hm) of an imaging element (1) in a signal transmission period, and a command to suspend output of the clocks (?Vn, ?Hm) in an idle period subsequent to the signal transmission period. The length of the idle period is a multiple of the length of the signal transmission period by a natural number. The imaging system controller (5) periodically repeats output of the control signal (VC) giving these commands a number of times corresponding to the number of horizontal lines of the imaging element (1). In response to the commands of the control signal (VC), a timing generator (2) generates and outputs the clocks (?Vn, ?Hm), and suspends generation and output of the same. An imaging device (10) thereby intermittently drives the imaging element (1), to generate and output a picked-up image signal (V2).Type: GrantFiled: September 30, 2002Date of Patent: January 29, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kozo Ishida, Tetsuya Kuno, Koichi Yamashita, Hiroaki Sugiura, Takashi Itow
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Publication number: 20070126896Abstract: A regression analysis is carried out (8) using pixel signals having a K-th spectral characteristic as the explanatory variable and pixel signals having an L-th spectral characteristic as the purpose variable in a plurality of pixel positions in an area neighboring a pixel of interest to obtain a pixel signal having the L-th spectral characteristic (9). Pixel signals obtained by low-pass filtering (7a-7c) of the output signals of an imaging device may be used as the explanatory variable and the purpose variable. The occurrence of false colors is thereby reduced when, in a group of pixel signals from pixels arrayed on a two-dimensional plane, each pixel having one of a plurality of spectral characteristics, the missing colors at each pixel position are obtained by interpolation.Type: ApplicationFiled: December 10, 2004Publication date: June 7, 2007Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Junko Makita, Shoutarou Moriya, Hiroaki Sugiura, Koichi Yamashita, Takashi Itow, Tetsuya Kuno
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Patent number: 7133075Abstract: An image capture apparatus which is compact and structurally simple and allows for prevention of a flicker noise, a method of capturing an image which allows for prevention of a flicker noise, and a mobile terminal using the apparatus and the method, are provided. In the image capture apparatus, a vertical cycle is adjusted so as to maintain 20 fps or 20/2m (m is an integer) fps, thereby to prevent a flicker noise in an image as obtained. To this end, in the image capture apparatus, a frequency of a horizontal transfer clock, a horizontal count level and a vertical line count level may be adjusted. Further, a fraction count is provided to adjust the length of one vertical cycle. Moreover, the image capture apparatus may be incorporated in a mobile terminal.Type: GrantFiled: November 14, 2002Date of Patent: November 7, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kozo Ishida, Tetsuya Kuno, Koichi Yamashita, Hiroaki Sugiura, Takashi Itow