Shutter Lag Correction Patents (Class 396/247)
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Patent number: 9154707Abstract: A device includes a correction section configured to correct an image of an object captured by using a first shutter operation for starting exposure of a plurality of photoelectric conversion elements and a second shutter operation for ending exposure of the photoelectric conversion elements. The correction section is configured to correct the image according to a distance from an optical axis center to the photoelectric conversion elements to minimize variance in exposure duration among the photoelectric conversion elements between the first shutter operation and the second shutter operation.Type: GrantFiled: January 28, 2014Date of Patent: October 6, 2015Assignee: Seiko Epson CorporationInventor: Ryuichi Shiohara
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Patent number: 8896751Abstract: A digital photographing apparatus and a method of controlling the same. A continuous shooting speed of the digital photographing apparatus may be improved by simultaneously performing a shutter operation and a read out operation of image data. A disclosed method of controlling a digital photographing apparatus includes displaying an image signal input through an image pickup device as a live view image, performing a first operation by driving a shutter, reading data from the image pickup device, and performing a second operation by driving the shutter during a time period overlapping the reading of the data.Type: GrantFiled: December 9, 2011Date of Patent: November 25, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Myung-hun Lee
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Image sensing apparatus that controls start timing of charge accumulation and control method thereof
Patent number: 8432481Abstract: An image sensing apparatus has an image sensing element which accumulates received light as a charge, a mechanical shutter which travels to shield the image sensing element, and a scan unit which makes a scan for starting charge accumulation. The image sensing apparatus executes the scan for starting charge accumulation prior to traveling of the mechanical shutter and controls the scan for starting charge accumulation and traveling of the shutter to serve as a front curtain and a rear curtain of a shutter. Note that a scan pattern setting unit (113b) sets the scan pattern of the charge accumulation start scan based on information associated with a mounted photographing lens.Type: GrantFiled: December 1, 2010Date of Patent: April 30, 2013Assignee: Canon Kabushiki KaishaInventors: Akihiro Namai, Hiroshi Kikuchi -
Patent number: 8107003Abstract: An image sensing apparatus having an electronic shutter for controlling the charge accumulation time of an image sensing element and a mechanical shutter for releasing/shielding an optical path to the image sensing element includes an electronic shutter mode of controlling the image sensing time mainly by the electronic shutter and a mechanical shutter mode of controlling the image sensing time mainly by the mechanical shutter. In the electronic shutter mode, the operations of the electronic and mechanical shutters are controlled to overlap each other, and a charge reading period of the image sensing element and part of a release operation period of the mechanical shutter are controlled to overlap each other.Type: GrantFiled: February 22, 2008Date of Patent: January 31, 2012Assignee: Canon Kabushiki KaishaInventor: Toshio Matsumoto
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Patent number: 7929856Abstract: An exemplary method for capturing a still image includes: measuring a theoretic exposure time that is suitable for current ambient light conditions; controlling a charge coupled device image sensor to expose itself for a real exposure time according to the determined theoretic exposure time to capture an image signal; and adjusting the captured image signal according to a ratio of the theoretic exposure time to the real exposure time.Type: GrantFiled: June 11, 2008Date of Patent: April 19, 2011Assignee: Hon Hai Precision Industry Co., Ltd.Inventor: Ming-Kun Chen
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Patent number: 7894718Abstract: An imaging apparatus includes an image sensor configured to capture an image of an object, a mechanical shutter including a second curtain and a second-curtain holding mechanism configured to electromagnetically hold the second curtain at an initial position prior to a travel, a first temperature sensor disposed within a predetermined range from the second-curtain holding mechanism, a second temperature sensor disposed outside the predetermined range from the second-curtain holding mechanism, a determination unit configured to determine an exposure time for the image sensor according to a brightness of the object, an adjustment unit configured to adjust the exposure time if a temperature difference between temperatures detected by the first and second temperature sensors is greater than a predetermined threshold, and an exposure control unit configured to perform exposure control for the image sensor based on the exposure time adjusted by the adjustment unit if the temperature difference is greater than the pType: GrantFiled: August 4, 2010Date of Patent: February 22, 2011Assignee: Canon Kabushiki KaishaInventor: Toru Kawashima
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Patent number: 7848631Abstract: An imaging apparatus includes an image sensor configured to capture an image of an object, a mechanical shutter including a second curtain and a second-curtain holding mechanism configured to electromagnetically hold the second curtain at an initial position prior to a travel, a first temperature sensor disposed within a predetermined range from the second-curtain holding mechanism, a second temperature sensor disposed outside the predetermined range from the second-curtain holding mechanism, a determination unit configured to determine an exposure time for the image sensor according to a brightness of the object, an adjustment unit configured to adjust the exposure time if a temperature difference between temperatures detected by the first and second temperature sensors is greater than a predetermined threshold, and an exposure control unit configured to perform exposure control for the image sensor based on the exposure time adjusted by the adjustment unit if the temperature difference is greater than the pType: GrantFiled: March 18, 2008Date of Patent: December 7, 2010Assignee: Canon Kabushiki KaishaInventor: Toru Kawashima
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Patent number: 7783183Abstract: Systems and methods for reducing the visibility of rain in acquired images are provided. One or more inputs relating the scene desired to be acquired by the user are used to retrieve camera settings that will reduce the visibility of rain in acquired images. Additionally, features relating to the scene may be automatically determined and used alone, or in combination with user inputs, to retrieve camera settings. The acquired images may be part of a video. Another feature of the invention is its use as a rain gauge. The camera settings are adjusted to enhance the visibility of rain, then one or more images are acquired and analyzed for the amount and size of raindrops. From this analysis the rain rate can be determined.Type: GrantFiled: December 22, 2009Date of Patent: August 24, 2010Assignee: The Trustees of Columbia University in the City of New YorkInventors: Kshitiz Garg, Shree K. Nayar
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Patent number: 7684690Abstract: A method for automatic exposure compensation is disclosed. A shutter is activated and the environmental brightness is detected using a sensor. An exposure value is calculated according to the detection result to obtain a default exposure time. It is determined whether the exposure value is equal to a normal value. If not, a compensation value is calculated based on a shutter-closing curve and a compensation operation is thus executed. Thus, an exposure signal is generated by advancing a first predefined time or postponing a second predefined time, enabling the amount of exposure time to be equal to the addition or subtraction of the default exposure time and the first predefined time.Type: GrantFiled: June 7, 2007Date of Patent: March 23, 2010Assignee: Asia Optical Co., Inc.Inventor: Yueh-Ju Lee
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Patent number: 7684692Abstract: The invention includes an image sensor, a shutter which opens/closes by making a front curtain and a rear curtain travel, a light source which illuminates the image sensor, a control unit which performs control to make the front and rear curtains travel with a predetermined time shift to form a slit-like opening, and to make the light source emit light a predetermined period of time after the start time of traveling of the front and rear curtains, a detection unit which detects the deviation between the position of an image of the recorded slit-like opening and a predetermined reference position, a computation unit which calculates the error between the traveling start timing of the front and rear curtains on the basis of the detected deviation, and a correction unit which corrects the calculated error between the traveling start timing of the front and rear curtains.Type: GrantFiled: December 28, 2006Date of Patent: March 23, 2010Assignee: Canon Kabushiki KaishaInventor: Ritsuo Kashiyama
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Patent number: 7660517Abstract: Systems and methods for reducing the visibility of rain in acquired images are provided. One or more inputs relating the scene desired to be acquired by the user are used to retrieve camera settings that will reduce the visibility of rain in acquired images. Additionally, features relating to the scene may be automatically determined and used alone, or in combination with user inputs, to retrieve camera settings. The acquired images may be part of a video. Another feature of the invention is its use as a rain gauge. The camera settings are adjusted to enhance the visibility of rain, then one ore more images are acquired and analyzed for the amount and size of raindrops. From this analysis the rain rate can be determined.Type: GrantFiled: March 16, 2006Date of Patent: February 9, 2010Assignee: The Trustees of Columbia University in the City of New YorkInventors: Kshitiz Garg, Shree K. Nayar
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Patent number: 7496286Abstract: Devices, systems, and methods for controlling a shutter of a still or video camera or cellular telephone, to reduce blurring due to motion of vibrations are disclosed. The control device includes an inertial sensor for measuring acceleration, velocity and/or angular rotation and for providing data therefrom and a controller for calculating an acceleration amplitude and frequency for predicting the time between acceleration maximums. The controller opens and closes the camera shutter at a time corresponding to the predicted time between maximum accelerations as measured from a real-time acceleration maximum, negating the need for post-imaging correction.Type: GrantFiled: June 5, 2006Date of Patent: February 24, 2009Assignee: Memsic, Inc.Inventor: Yang Zhao
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Patent number: 7440022Abstract: An image sensing apparatus having an electronic shutter for controlling the charge accumulation time of an image sensing element and a mechanical shutter for releasing/shielding an optical path to the image sensing element includes an electronic shutter mode of controlling the image sensing time mainly by the electronic shutter and a mechanical shutter mode of controlling the image sensing time mainly by the mechanical shutter. In the electronic shutter mode, the operations of the electronic and mechanical shutters are controlled to overlap each other, and a charge reading period of the image sensing element and part of a release operation period of the mechanical shutter are controlled to overlap each other.Type: GrantFiled: December 5, 2001Date of Patent: October 21, 2008Assignee: Canon Kabushiki KaishaInventor: Toshio Matsumoto
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Patent number: 6353709Abstract: A camera capable of detecting an abnormality has photographing operation programs, an abnormality detection program, and a checking operation program installed therein. The photographing operation programs cause a plurality of mechanisms included in the camera to act sequentially. The abnormality detection program detects an abnormality in an action of a predetermined one of the plurality of mechanisms. Responsive to detection of the abnormality in the action of the predetermined mechanism, as detected by the abnormality detection program, the checking operation program causes the predetermined mechanism alone to act again for checking of the predetermined mechanism under conditions different from those under which the predetermined mechanism has acted to have the abnormality detected by the abnormality detection program.Type: GrantFiled: March 15, 2000Date of Patent: March 5, 2002Assignee: Olympus Optical Co., Ltd.Inventors: Satoshi Miyazaki, Masahiro Dai
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Patent number: 6347191Abstract: A shutter control apparatus is constructed for executing an exposure operation of a camera to photograph an object by controlling an actuator which drives a shutter blade to be opened and closed. In the shutter control apparatus, a battery supplies a power supply voltage. A detection circuit detects a variation occurring in the power supply voltage. A drive circuit directly uses the power supply voltage to feed a power to the actuator. The drive circuit switches between an open power for opening the shutter blade and a closing power for closing the shutter blade. A control circuit controls the drive circuit by setting a timing for switching to the closing power in accordance with at least a brightness of an object. The control circuit corrects the timing for switching to the closing power in accordance with the variation of the power supply voltage detected by the detection circuit.Type: GrantFiled: October 25, 2000Date of Patent: February 12, 2002Assignee: Nidec Copal CorporationInventor: Tomio Kurosu
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Patent number: 5835800Abstract: A camera has a calculator which calculates a photographing condition suitable for a selected exposure mode. A driving device of the camera performs a photographing operation in accordance with a nominal value of an exposure parameter calculated by the calculator. The camera is provided with a measurement device which measures a real value of the exposure parameter in the photographing operation. The calculator is controlled to perform an exposure calculation on the basis of the real value of the exposure parameter obtained by the measurement device.Type: GrantFiled: July 23, 1997Date of Patent: November 10, 1998Assignee: Nikon CorporationInventors: Tetsuro Goto, Akira Katayama