Patents by Inventor Eisaku Tatsumi
Eisaku Tatsumi 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: 8619189Abstract: An image processing apparatus, which converts a frame rate by dividing an input frame into sub-frames and outputting the sub-frames, includes a minimum value filter unit, a low-pass filter processing unit, a generation unit, and a switching unit. In an input frame, the minimum value filter unit selects a maximum value of minimum values from the minimum values of pixel values in each horizontal line in a predetermined area including peripheral pixels of a processing target pixel, and performs pre-processing to replace the processing target pixel with the maximum value. The low-pass filter processing unit performs low-pass filter processing on the pre-processed input frame and generates a first sub-frame. The generation unit generates a second sub-frame from the first sub-frame and the input frame. The switching unit switches the first sub-frame and the second sub-frame at predetermined timing and outputs a sub-frame.Type: GrantFiled: December 10, 2010Date of Patent: December 31, 2013Assignee: Canon Kabushiki KaishaInventors: Yasushi Ito, Eisaku Tatsumi, Kazuya Kitada
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Publication number: 20130329193Abstract: In a projection apparatus, a polygon mirror transforms light from a light source into a two-dimensional luminous flux. A liquid crystal panel performs spatial light modulation of the luminous flux incident from the polygon mirror, based on image data. An image adjusting circuit controls the amount of luminous flux for each predetermined control unit based on the gradation distribution of the image data.Type: ApplicationFiled: May 29, 2013Publication date: December 12, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Eisaku Tatsumi
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Patent number: 8588473Abstract: Provided is a method for controlling an image processing apparatus for generating and outputting frames different from each other in frequency component from an input frame include, detecting motion of the input frame by comparing the input frame with a frame before or after the input frame in terms of time, storing the input frame in a frame memory, and reading the input frame by a plurality of times to convert a frame rate of the input frame, generating the frames different from each other in frequency component from the frame whose frame rate has been converted, outputting the generated frames if the detected input frame is determined to be a moving image, and outputting the frame whose frame rate has been converted if the input frame is determined to be a still image.Type: GrantFiled: December 9, 2010Date of Patent: November 19, 2013Assignee: Canon Kabushiki KaishaInventors: Toru Aida, Eisaku Tatsumi, Kazuya Kitada
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Patent number: 8576925Abstract: An image processing apparatus which converts a frame rate by dividing an input frame into subframes and outputting the subframes, comprises, a preprocessing unit adapted to perform preprocessing of replacing a pixel value of a pixel of interest with a minimum pixel value of peripheral pixels of the pixel of interest in an input frame, a low-pass filter processing unit adapted to generate a first subframe by performing a low-pass filtering process on the input frame having undergone the preprocessing, a generating unit adapted to generate a second subframe from the first subframe and the input frame, and a switching unit adapted to output the first subframe and the second subframe by switching the first subframe and the second subframe at a predetermined timing.Type: GrantFiled: April 14, 2009Date of Patent: November 5, 2013Assignee: Canon Kabushiki KaishaInventors: Osamu Itokawa, Eisaku Tatsumi
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Publication number: 20130271622Abstract: An image processing apparatus for generating a high dynamic range image using a plurality of images obtained by capturing images of a same object with different exposure values, has: an input unit for inputting a correctly exposed image generated with correct exposure and an incorrectly exposed image generated with exposure other than the correct exposure; a filter unit for performing low pass filter processing on the incorrectly exposed image; and a composition unit for generating a high dynamic range image by composing an output image of the filter unit with the correctly exposed image.Type: ApplicationFiled: June 12, 2013Publication date: October 17, 2013Inventor: Eisaku Tatsumi
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Patent number: 8542493Abstract: A flat display apparatus has a flat display panel; a frame that is installed on a rear face side of the display panel; a cover that covers at least a rear face side of the frame; and a high-voltage power supply that applies high voltage to the display panel. The high-voltage power supply has a plurality of cases, each of which encloses one or more transformers and rectifier circuits, and obtains high voltage by connecting the plurality of cases in series, and the plurality of cases are arranged in a space created between the frame and the cover so as to be disposed on a plane in parallel with a screen of the display panel.Type: GrantFiled: July 14, 2010Date of Patent: September 24, 2013Assignee: Canon Kabushiki KaishaInventors: Naoto Abe, Eisaku Tatsumi, Tatsuya Nakajima
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Publication number: 20130234922Abstract: A timing controller performs control to cause a backlight to emit light at first brightness for a first time in a period that original image data is displayed on a liquid crystal panel, and cause the backlight to emit light at second brightness darker than the first brightness for a second time longer than the first time in a period that intermediate image data generated based on the original image data is displayed on the liquid crystal panel.Type: ApplicationFiled: March 4, 2013Publication date: September 12, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Eisaku Tatsumi
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Publication number: 20120121164Abstract: An image processing apparatus according to the present invention, comprises a calculation unit that calculates a sharpness of a 2D image for each region thereof; an image processing unit that performs image processing, in a region with a sharpness calculated by the calculation unit being higher than a first predetermined value, to increase that sharpness, and performing image processing, in a region with a sharpness calculated by the calculation unit being lower than a second predetermined value which is equal to or lower than the first predetermined value, to reduce that sharpness; and a generation unit that generates, from the 2D image processed by the image processing unit, an image for a left eye and an image for a right eye by shifting the 2D image in a horizontal direction.Type: ApplicationFiled: October 21, 2011Publication date: May 17, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Eisaku Tatsumi
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Publication number: 20110249143Abstract: An image processing apparatus for generating a high dynamic range image using a plurality of images obtained by capturing images of a same object with different exposure values, has: an input unit for inputting a correctly exposed image generated with correct exposure and an incorrectly exposed image generated with exposure other than the correct exposure; a filter unit for performing low pass filter processing on the incorrectly exposed image; and a composition unit for generating a high dynamic range image by composing an output image of the filter unit with the correctly exposed image.Type: ApplicationFiled: April 6, 2011Publication date: October 13, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Eisaku Tatsumi
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Patent number: 7995080Abstract: A drive circuit of an image display apparatus has a correction circuit for outputting driving data that is corrected on the basis of a correction value. The correction value corrects variation of brightness of a plurality of pixels. The correction is such that the number of pixels to be darkened by the correction when the driving data inputted for the plurality of pixels have a common first value is fewer than the number of pixels to be darkened by the correction when the driving data inputted for the plurality of pixels have a common second value larger than the first value.Type: GrantFiled: December 6, 2007Date of Patent: August 9, 2011Assignee: Canon Kabushiki KaishaInventors: Naoto Abe, Eisaku Tatsumi
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Publication number: 20110142290Abstract: Provided is a method for controlling an image processing apparatus for generating and outputting frames different from each other in frequency component from an input frame include, detecting motion of the input frame by comparing the input frame with a frame before or after the input frame in terms of time, storing the input frame in a frame memory, and reading the input frame by a plurality of times to convert a frame rate of the input frame, generating the frames different from each other in frequency component from the frame whose frame rate has been converted, outputting the generated frames if the detected input frame is determined to be a moving image, and outputting the frame whose frame rate has been converted if the input frame is determined to be a still image.Type: ApplicationFiled: December 9, 2010Publication date: June 16, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Toru Aida, Eisaku Tatsumi, Kazuya Kitada
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Publication number: 20110141350Abstract: An image processing apparatus, which converts a frame rate by dividing an input frame into sub-frames and outputting the sub-frames, includes a minimum value filter unit, a low-pass filter processing unit, a generation unit, and a switching unit. In an input frame, the minimum value filter unit selects a maximum value of minimum values from the minimum values of pixel values in each horizontal line in a predetermined area including peripheral pixels of a processing target pixel, and performs pre-processing to replace the processing target pixel with the maximum value. The low-pass filter processing unit performs low-pass filter processing on the pre-processed input frame and generates a first sub-frame. The generation unit generates a second sub-frame from the first sub-frame and the input frame. The switching unit switches the first sub-frame and the second sub-frame at predetermined timing and outputs a sub-frame.Type: ApplicationFiled: December 10, 2010Publication date: June 16, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Yasushi Ito, Eisaku Tatsumi, Kazuya Kitada
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Publication number: 20110110602Abstract: An image processing apparatus that converts a frame rate by creating a sub-frame from an input frame and outputting the sub-frame, the image processing apparatus includes a generation unit configured to generate the sub-frame from the input frame, a calculation unit configured to calculate a feature amount of brightness of the input frame, and a control unit configured to perform control so as to reduce luminance of the sub-frames generated by the generation unit based on the feature amount calculated by the calculation unit.Type: ApplicationFiled: October 27, 2010Publication date: May 12, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Yukio Hiraki, Eisaku Tatsumi
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Publication number: 20110103708Abstract: To reduce flickering in driving distributed processing, an image processing apparatus which generates and outputs a plurality of sub frame images having different luminance patterns for each of a plurality of frame images included in input moving image data, includes a filtering unit configured to perform filter processing for the frame image, a setting unit configured to set a first coefficient A and a second coefficient B, a first generation unit configured to generate a first sub frame image, a second generation unit configured to generate a second sub frame image, and an output control unit configured to selectively output the first sub frame image and the second sub frame image at a predetermined timing.Type: ApplicationFiled: September 27, 2010Publication date: May 5, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Eisaku Tatsumi
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Publication number: 20110102479Abstract: An image processing apparatus comprises an identification unit configured to identify, for each pixel in the frame image, minimum pixel values for each color component from pixel values of surrounding pixels for each color component, wherein the surrounding pixels are positioned around the pixel, and identifying, as a common pixel value, a minimum value in the minimum pixel values identified for each color component; a generation unit configured to generate a preprocessed image which can be obtained by replacing a pixel value of each pixel in the frame image with the common pixel value identified for the pixel by the identification unit; a low-pass filtering unit configured to generate a first subframe image by applying a low-pass filter to the preprocessed image; a subtraction unit configured to generate, as a second subframe image, a difference image between the frame image and the first subframe image.Type: ApplicationFiled: October 14, 2010Publication date: May 5, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kazuya Kitada, Eisaku Tatsumi, Makiko Mori
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Publication number: 20110097012Abstract: An image processing apparatus comprises an input unit configured to input image data including m frame images per unit time; a filtering unit configured to generate a high-frequency component emphasized frame image and a low-frequency component frame image from each frame image; a correction unit configured to correct a luminance of the low-frequency component frame image corresponding to each frame image at a predetermined ratio so as to make the image data perceptible in the same brightness as that of each of the frame images output as the m frames per unit time; and an output unit configured to alternately output the high-frequency component emphasized frame image generated by the filtering unit and the low-frequency component frame image whose luminance has been corrected by the correction unit as image data including 2 m frame images per unit time.Type: ApplicationFiled: September 27, 2010Publication date: April 28, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Eisaku Tatsumi
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Publication number: 20110090264Abstract: An impulse-type image display apparatus includes a frame frequency conversion circuit for converting an image signal of a first frame frequency into an image signal of a second frame frequency greater than the first frame frequency, a plurality of gradation conversion circuits for converting a gradation of the image signal of the second frame frequency, and a selection circuit for periodically selecting an output image from the plurality of the gradation conversion circuits. A gradation conversion ratio of at least one gradation conversion circuits of the plurality of gradation conversion circuits is different from the gradation conversion ratios of the other gradation conversion circuits.Type: ApplicationFiled: March 30, 2009Publication date: April 21, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Eisaku Tatsumi
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Publication number: 20110057964Abstract: An image display apparatus comprises: a display panel; and an image processing unit which divides one frame into a frame of a main image and N frame(s) of sub-image(s), and outputs a video signal that includes the frame of the main image and the frame(s) of the sub-image(s) to the display panel, wherein the image processing unit comprises: a brightness control unit which generates frames corresponding to the main image and the sub-images based on the same input image data, and relatively reduces the brightness of the frame corresponding to the sub-image with respect to the brightness of the frame corresponding to the main image; and a period setting unit which sets a length of respective horizontal scan periods so that the horizontal scan period in the frame of the main image is longer than the horizontal scan period in the frames of the sub-image.Type: ApplicationFiled: September 3, 2010Publication date: March 10, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Hidenori Kanazawa, Eisaku Tatsumi, Osamu Sagano
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Patent number: 7889168Abstract: An image display apparatus includes a plurality of display devices, a plurality of scan interconnections and a plurality of modulation interconnections, a scanning circuit for applying a scanning signal to the scan interconnections, and a modulation circuit for applying a modulation signal to the modulation interconnections. The scanning circuit applies the scanning signals to a group of scan interconnections selected from the plurality of scan interconnections in one select period, and applies the scanning signals, in a subsequent select period, to the plurality of scanning interconnections which were shifted with one scan interconnection portion from the group of scanning interconnections to which the scanning signals were applied in a previous select period.Type: GrantFiled: February 20, 2007Date of Patent: February 15, 2011Assignee: Canon Kabushiki KaishaInventors: Tatsuro Yamazaki, Naoto Abe, Eisaku Tatsumi, Makiko Mori, Muneki Ando, Takeshi Ikeda
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Publication number: 20110025726Abstract: An image processing circuit generates an output video signal from an input video signal and outputs the output video signal to a display panel with a higher frame frequency than the frame frequency of the input video signal. The output video signal includes a main-frame image and a sub-frame image. The image processing circuit has a luminance control unit. When the frame frequency of the output video signal is Io, and the display luminance of the sub-frame is B (0<B<0.5), the luminance control unit determines the ratio of the display luminance between the main-frame image and the sub-frame image so that the frequency In calculated by B=(2/3)×(1?(Io/2In)2) is equal to or more than 65 Hz and equal to or less than 80 Hz.Type: ApplicationFiled: July 16, 2010Publication date: February 3, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Eisaku Tatsumi