Patents by Inventor Koichi Washisu

Koichi Washisu 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).

  • Publication number: 20120140086
    Abstract: An image pickup apparatus includes a first detection unit for detecting a rotation shake, a first computation unit for processing a detection signal of the rotation shake into a rotation shake correction target value, a second detection unit for detecting a parallel shake in a plane surface perpendicular to an optical axis, a second computation unit for process a detection signal of the parallel shake into a parallel shake correction target value, a shake correction unit for correcting an image shake in the plane surface of the image pickup apparatus based on the rotation and parallel shake correction target values, an initialization unit for initializing the parallel shake correction target value, and a control unit for moving the shake correction unit based on an image pickup start instruction prior to an image pickup operation while initializing the parallel shake correction target value.
    Type: Application
    Filed: February 13, 2012
    Publication date: June 7, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Koichi Washisu
  • Patent number: 8159545
    Abstract: An image stabilization control apparatus includes a vibration correction unit configured to correct an image shake occurring due to vibration, a first vibration detection unit configured to detect and output an angular velocity of the vibration, a second vibration detection unit configured to detect and output an acceleration of the vibration, a first extractor configured to extract a signal in a predetermined frequency band based on an output of the first vibration detection unit, a second extractor configured to extract a signal in a predetermined frequency band based on an output of the second vibration detection unit, an output correction unit configured to correct the output of the first vibration detection unit based on the signals extracted by the first and second extractors, and a driving unit configured to drive the vibration correction unit based on the output of the first vibration detection unit as corrected.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: April 17, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Washisu, Goro Noto, Junichi Saito
  • Patent number: 8144203
    Abstract: An image pickup apparatus includes a first detection unit for detecting a rotation shake, a first computation unit for processing a detection signal of the rotation shake into a rotation shake correction target value, a second detection unit for detecting a parallel shake in a plane surface perpendicular to an optical axis, a second computation unit for process a detection signal of the parallel shake into a parallel shake correction target value, a shake correction unit for correcting an image shake in the plane surface of the image pickup apparatus based on the rotation and parallel shake correction target values, an initialization unit for initializing the parallel shake correction target value, and a control unit for moving the shake correction unit based on an image pickup start instruction prior to an image pickup operation while initializing the parallel shake correction target value.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: March 27, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koichi Washisu
  • Patent number: 8023809
    Abstract: An apparatus includes a vibration correction unit configured to correct an image shake occurring due to vibration, a first detection unit configured to detect an angular velocity of the vibration, a second detection unit configured to detect an acceleration of the vibration, a calculation unit configured to calculate a correction value based on the output of the first detection unit and the output of the second detection unit, an output correction unit configured to correct an output of the first detection unit based on the correction value and to change a frequency characteristic of a signal based on the output of the first detection unit to apply an apparent frequency-dependent characteristic to the correction value, and a driving unit configured to drive the vibration correction unit based on an output of the first detection unit, an output of the output correction unit, or a combined output thereof.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: September 20, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Washisu, Goro Noto, Junichi Saito
  • Patent number: 7986853
    Abstract: An image processing apparatus, which obtains a synthesized image whose exposure is corrected by synthesizing a first image and a second image, is disclosed. The image processing apparatus comprises a detection section which detects an amount of displacement of the second image with respect to the first image which is a reference image, a coordinate conversion section which performs coordinate conversion to the second image so as to conform to the first image, and a synthesis section which synthesizes the second image having been subjected to the coordinate conversion with the first image.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: July 26, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koichi Washisu
  • Patent number: 7983546
    Abstract: The optical image stabilizer (100) includes a first movable part including a first lens (11a) having one of positive and negative optical powers, a second movable part including a second lens (11b) having the other of the optical powers, and an actuator driving the first and second movable parts in the directions opposite to each other with respect to a supporting member (13). The actuator includes a first element (110a, 110b) provided on the supporting member, a second element (16a, 16b) provided on the first movable part and facing a first face of the first element, and a third element (16c, 16d) provided on the second movable part and facing a second face formed on an opposite side of the first element from the first face. The first element is one of a magnet and a coil, and the second element and the third element are the other of them.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: July 19, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koichi Washisu
  • Patent number: 7925144
    Abstract: An image stabilizing apparatus is disclosed which is capable of sufficiently correcting shift shakes even with a small and lightweight accelerometer. The apparatus includes an angular velocity detector which detects angular velocity generated by a shake, an angular velocity computing unit which processes an angular velocity signal, the unit processing the angular velocity signal with a first frequency characteristic, an acceleration detector which detects acceleration generated by the shake, an acceleration computing unit which processes an acceleration signal, the unit processing the acceleration signal with a second frequency characteristic having a signal processing band narrower than the first frequency characteristic, an adder which adds an output signal from the angular velocity computing unit to an output signal from the acceleration computing unit, and an image stabilizing mechanism which performs an image stabilizing operation based on an output signal from the adder.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: April 12, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koichi Washisu
  • Publication number: 20110063458
    Abstract: An image stabilization control apparatus including a mechanism which causes a vibration when the mechanism moves is disclosed. The apparatus comprises a vibration correction unit configured to correct image shake occurring due to vibration applied to the image stabilization control apparatus. A correction value of an angular velocity of the vibration is calculated based on signals based on the angular velocity and an acceleration of the vibration, frequency bands of the signals are narrowed. During the mechanism is moving, the image shake is corrected by driving the vibration correction unit based on the angular velocity of the vibration which is corrected by the corrected value calculated before the mechanism moves.
    Type: Application
    Filed: July 10, 2009
    Publication date: March 17, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Koichi Washisu, Goro Noto, Junichi Saito
  • Publication number: 20110022403
    Abstract: A sound recording apparatus having a driving unit generates a sound signal from an input sound, detects the level of the sound signal, adjusts the level of the generated sound signal at an amplification factor corresponding to the detected level, and processes the adjusted sound signal to prevent an amplified sound signal from containing a sound signal generated upon driving the driving unit. The sound recording apparatus controls to replace a sound signal in a predetermined period after instructing driving of the driving unit with a signal calculated from a sound signal in the first period after the predetermined period, and to substantially equalize an amplification factor when driving of the driving unit is instructed and that in the first period.
    Type: Application
    Filed: July 9, 2010
    Publication date: January 27, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Koichi Washisu, Masafumi Kimura, Fumihiro Kajimura
  • Publication number: 20100238320
    Abstract: An image processing apparatus, which obtains a synthesized image whose exposure is corrected by synthesizing a first image and a second image, is disclosed. The image processing apparatus comprises a detection section which detects an amount of displacement of the second image with respect to the first image which is a reference image, a coordinate conversion section which performs coordinate conversion to the second image so as to conform to the first image, and a synthesis section which synthesizes the second image having been subjected to the coordinate conversion with the first image.
    Type: Application
    Filed: June 9, 2010
    Publication date: September 23, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Koichi Washisu
  • Patent number: 7756354
    Abstract: An image processing apparatus, which obtains a synthesized image whose exposure is corrected by synthesizing a first image and a second image, is disclosed. The image processing apparatus comprises a detection section which detects an amount of displacement of the second image with respect to the first image which is a reference image, a coordinate conversion section which performs coordinate conversion to the second image so as to conform to the first image, and a synthesis section which synthesizes the second image having been subjected to the coordinate conversion with the first image.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: July 13, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koichi Washisu
  • Publication number: 20100118402
    Abstract: The optical image stabilizer (100) includes a first movable part including a first lens (11a) having one of positive and negative optical powers, a second movable part including a second lens (11b) having the other of the optical powers, and an actuator driving the first and second movable parts in the directions opposite to each other with respect to a supporting member (13). The actuator includes a first element (110a, 110b) provided on the supporting member, a second element (16a, 16b) provided on the first movable part and facing a first face of the first element, and a third element (16c, 16d) provided on the second movable part and facing a second face formed on an opposite side of the first element from the first face. The first element is one of a magnet and a coil, and the second element and the third element are the other of them.
    Type: Application
    Filed: May 16, 2008
    Publication date: May 13, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Koichi Washisu
  • Publication number: 20100079604
    Abstract: An optical apparatus includes a lens frame 12 which holds a focus correction lens 11a and is movable in an optical axis direction, optical axis direction position detectors 19a to 19c which are arranged on one of the lens frame 12 and a supporting portion 13 inside a barrel and detect signals in accordance with a distance to the other one, driving portions 112a to 112c and coils 17a to 17c (driver) which drive the lens frame 12 in the optical axis direction, an optical axis direction movement limiting member of the lens frame, and a lens CPU 1204 (controller) which controls the driver so as to suppress a tilt of the focus correction lens 11a based on a signal detected by the optical axis direction position detectors 19a to 19c whose sensitivities have been calibrated in association with the driving portions and the optical axis direction movement limiting member.
    Type: Application
    Filed: September 24, 2009
    Publication date: April 1, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Koichi Washisu
  • Publication number: 20100074605
    Abstract: An image stabilizing apparatus is disclosed which is capable of sufficiently correcting shift shakes even with a small and lightweight accelerometer. The apparatus includes an angular velocity detector which detects angular velocity generated by a shake, an angular velocity computing unit which processes an angular velocity signal, the unit processing the angular velocity signal with a first frequency characteristic, an acceleration detector which detects acceleration generated by the shake, an acceleration computing unit which processes an acceleration signal, the unit processing the acceleration signal with a second frequency characteristic having a signal processing band narrower than the first frequency characteristic, an adder which adds an output signal from the angular velocity computing unit to an output signal from the acceleration computing unit, and an image stabilizing mechanism which performs an image stabilizing operation based on an output signal from the adder.
    Type: Application
    Filed: September 11, 2009
    Publication date: March 25, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Koichi Washisu
  • Publication number: 20100013937
    Abstract: An image stabilization control apparatus includes a vibration correction unit configured to correct an image shake occurring due to vibration, a first vibration detection unit configured to detect and output an angular velocity of the vibration, a second vibration detection unit configured to detect and output an acceleration of the vibration, a first extractor configured to extract a signal in a predetermined frequency band based on an output of the first vibration detection unit, a second extractor configured to extract a signal in a predetermined frequency band based on an output of the second vibration detection unit, an output correction unit configured to correct the output of the first vibration detection unit based on the signals extracted by the first and second extractors, and a driving unit configured to drive the vibration correction unit based on the output of the first vibration detection unit as corrected.
    Type: Application
    Filed: July 14, 2009
    Publication date: January 21, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Koichi Washisu, Goro Noto, Junichi Saito
  • Publication number: 20100014847
    Abstract: An apparatus includes a vibration correction unit configured to correct an image shake occurring due to vibration, a first detection unit configured to detect an angular velocity of the vibration, a second detection unit configured to detect an acceleration of the vibration, a calculation unit configured to calculate a correction value based on the output of the first detection unit and the output of the second detection unit, an output correction unit configured to correct an output of the first detection unit based on the correction value and to change a frequency characteristic of a signal based on the output of the first detection unit to apply an apparent frequency-dependent characteristic to the correction value, and a driving unit configured to drive the vibration correction unit based on an output of the first detection unit, an output of the output correction unit, or a combined output thereof.
    Type: Application
    Filed: July 14, 2009
    Publication date: January 21, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Koichi Washisu, Goro Noto, Junichi Saito
  • Patent number: 7634178
    Abstract: An image stabilizing apparatus and an image pickup apparatus that can detect shift shake reliably with a simple configuration and make highly accurate image blur correction possible even at very short subject distances. The apparatus has an angular velocity detector for detecting the angular velocity generated by shaking of the apparatus, an acceleration detector for detecting acceleration generated by the shaking, tor for calculating a correction value from the angular velocity, an acceleration corrector for correcting the acceleration based on the shake correction value, and a blur corrector for correcting image blur by decentering an optical axis based on an output of the acceleration corrector and an output of the calculator.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: December 15, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koichi Washisu
  • Patent number: 7634181
    Abstract: An image stabilizing system performs rotational-shake correction to increase focus precision so that shift shake correction can be performed with high precision based on highly accurate image magnification information obtained by the high focus precision.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: December 15, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koichi Washisu
  • Patent number: 7616879
    Abstract: There is provided an optical apparatus that provides quick and precise TTL phase difference detection and pupil slicing focus detection. An optical apparatus includes a first optical element for splitting a first polarized light component contained in light that passes an exit pupil of a first optical system and directs to a photoelectric conversion element so that the first polarized light component direct to different light-receiving areas on the photoelectric conversion element. The optical apparatus may further include a second optical element for separating a second polarized light component contained in the light from said first optical element, from the first polarized light component.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: November 10, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Nagano, Makoto Takamiya, Koichi Washisu
  • Patent number: 7609950
    Abstract: An image stabilizing apparatus is disclosed which is capable of sufficiently correcting shift shakes even with a small and lightweight accelerometer. The apparatus includes an angular velocity detector which detects angular velocity generated by a shake, an angular velocity computing unit which processes an angular velocity signal, the unit processing the angular velocity signal with a first frequency characteristic, an acceleration detector which detects acceleration generated by the shake, an acceleration computing unit which processes an acceleration signal, the unit processing the acceleration signal with a second frequency characteristic having a signal processing band narrower than the first frequency characteristic, an adder which adds an output signal from the angular velocity computing unit to an output signal from the acceleration computing unit, and an image stabilizing mechanism which performs an image stabilizing operation based on an output signal from the adder.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: October 27, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koichi Washisu