Having In-focus Threshold Adjustable Patents (Class 396/102)
  • Patent number: 10600195
    Abstract: Provided is a depth detection apparatus for detecting depth information from a first and a second image based on a light flux passing through different pupil regions, the apparatus including an image generator that generates a third and a fourth image by subjecting the first and the second image to a filter, a depth detector that detects depth information from a relative positional shift amount between the third and the fourth image, a representative value acquirer that acquires a representative value of spatial frequencies of the third or the fourth image from a frequency characteristic of the filter, and a confidence determiner that determines confidence for the depth information from the representative value. The confidence is determined as a value representing higher confidence as the representative value is greater.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: March 24, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kiyokatsu Ikemoto
  • Patent number: 10044927
    Abstract: A method and apparatus for capturing stable images are disclosed. An ambient light sensor makes measurements of ambient light. A change in ambient light between two measurements is determined. If the change in ambient light measurements falls in a predefined range, then the change may be attributable to ambient light sensor being blocked by a user to trigger image capturing. Consequently, a camera is triggered to capture an image. Conversely, if the change in ambient light measurement is outside the range, image capturing is not triggered as the change may be attributable to other factors.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: August 7, 2018
    Assignee: STMICROELECTRONICS INTERNATIONAL N.V.
    Inventor: Rosarium Pila
  • Patent number: 9942465
    Abstract: According to the present invention, an imaging condition setting method includes an object discriminating step S1-1 of discriminating the object by using images, a discriminable range generating step S1-2 of generating a discriminable range that is a range of the imaging conditions under which the object is discriminable, an identification determination result range generating step S1-2 of generating an identification determination result range that is a range of the imaging conditions under which the objects are determined as identical, an imaging condition setting rule generating step S1-4 of generating an imaging condition setting rule that is a rule for changing an imaging condition by using the discriminable range and the identification determination result range, and an imaging condition setting step S2-4 of setting an imaging condition under which the object is discriminable by using the imaging condition setting rule generated by the imaging condition setting rule generating step.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: April 10, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Mikio Kiura
  • Patent number: 9910247
    Abstract: Methods and apparatuses for focus hunting prevention for phase detection auto focus (AF) are disclosed. In one aspect, the method is operable by an imaging device, for preventing focus hunting during a phase detection AF process. The method may include capturing an image of a scene and generating a phase difference value and a confidence level for the phase difference value based on the image. The method may also include calculating a focus hunting metric based at least in part on the phase difference value and the confidence level. The method may further include preventing focus hunting via at least one of preventing the start of the focus search and terminating the focus search, in response to the focus hunting metric meeting or exceeding a defined threshold value.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: March 6, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Jisoo Lee, Leung Chun Chan
  • Patent number: 9354056
    Abstract: A distance measurement apparatus includes an imaging lens configured to form an image of an object on an imaging plane, a solid-state image sensor configured to acquire an image based on light flux passing through a plurality of areas different from each other in an exit pupil of the imaging lens, and a calculation unit configured to calculate a distance based on a signal acquired from the solid-state image sensor. The calculation unit includes a processing unit configured to acquire a first signal in a first imaging condition by using the solid-state image sensor, a processing unit configured to acquire a second signal in a second imaging condition different from the first imaging condition by using the solid-state image sensor, and a processing unit configured to calculate a base length and a distance based on the first signal and the second signal.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: May 31, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Daisuke Yamada
  • Patent number: 8786690
    Abstract: An imaging apparatus includes an imaging section that images an object, an observation mode setting section that sets an observation mode when the imaging section images the object, and a control section that controls an image read mode in which an image is read from the imaging section and a in-focus object plane of the imaging section based on the observation mode set by the observation mode setting section.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: July 22, 2014
    Assignee: Olympus Corporation
    Inventor: Koichiro Yoshino
  • Publication number: 20140099090
    Abstract: Embodiments of the present invention initially calculate a confidence score for the image environment surrounding the subject matter in order to determine the initial number of lens positions. Once the initial lens positions are determined, a sharpness score is calculated for each determined initial lens position. Using these sharpness scores, embodiments of the present invention generate a projection used to locate an estimated optimum focus position as well as to determine an estimated sharpness score at this lens position. Embodiments of the present invention then position the lens of the camera to calculate the actual sharpness score at the estimated optimum focus position, which is then compared to the estimated optimum sharpness score previously calculated. Based on this comparison, embodiments of the present invention dynamically determine whether it has a sufficient number of lens positions to determine the optimum focus position or if additional sample lens positions are needed.
    Type: Application
    Filed: October 4, 2012
    Publication date: April 10, 2014
    Applicant: NVIDIA CORPORATION
    Inventor: Hugh Phu Nguyen
  • Patent number: 8692927
    Abstract: There is set forth herein an imaging terminal having an image sensor array and a variable lens assembly for focusing an image onto the image sensor array. In one embodiment, an imaging terminal can include one or more focusing configuration selected from the group comprising a full set focusing configuration, a truncated set focusing configuration and a fixed focusing configuration. When a full set focusing configuration is active, a full set of candidate focus settings can be active when the imaging terminal determines a focus setting of the terminal responsively to a trigger signal activation. When a truncated set focusing configuration is active, a truncated range of candidate focus settings can be active when the imaging terminal determines a focus setting of the terminal responsively to a trigger signal activation.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: April 8, 2014
    Assignee: Hand Held Products, Inc.
    Inventors: Michael Pease, Scott Garmon, Jeffrey Baker
  • Patent number: 8610796
    Abstract: A digital camera of the present invention comprises: an imaging section, a read out section for reading out first image data for still picture storage from the imaging section, a storage section subjecting the first image data to image processing and storing the resultant data, an image data generating section for generating second image data that has fewer pixel data than the first image data, from the first image data, and a detection section for detecting at least one evaluation value based on the second image data, wherein a detection operation of the evaluation value by the detection section is executed in parallel to a still picture storage operation by the storage section.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: December 17, 2013
    Assignee: Olympus Imaging Corp.
    Inventor: Takeshi Kindaichi
  • Patent number: 8537265
    Abstract: An imaging apparatus that determines in-focus conditions according to a user's taste by using auto-focus (AF). The imaging apparatus including an AF unit, that allows the user to input an in-focus operation start command, and that allows the user to input a main photographing start command. The imaging apparatus includes a photographing environment storing unit that stores photographing stop and start data, an assumed in-focus condition group generating unit that generates an assumed in-focus condition group based on at least the photographing stop data, an assumption confirming unit that confirms the assumed in-focus condition group, and an in-focus condition group changing unit that, if an in-focus success rate for the assumed in-focus condition group is higher than for the default in-focus condition group, changes the default in-focus condition group to the assumed in-focus condition group.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: September 17, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tadashi Naruse
  • Patent number: 8494354
    Abstract: There is provided an apparatus that includes a receiving unit configured to receive instructions for focus adjustment; an image-pickup unit configured to perform image-pickup of an object image input through a focus lens; a setting unit configured to set a focus detecting area to be used at a time of detection of a focus state of the focus lens; a light control unit configured to control an amount of light incident on the image-pickup unit; and a focus adjusting unit configured to detect a focus signal representing the focus state in the focus detecting area to move the focus lens based on the focus signal and a position of the focus lens corresponding to the focus signal.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: July 23, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroyuki Ogino
  • Patent number: 8471953
    Abstract: An electronic camera includes an image sensor. The image sensor has an imaging surface irradiated with an optical image of an object scene through a focus lens and repeatedly generates an object scene image. A CPU executes an AF process for adjusting a distance from the focus lens to the imaging surface to a distance corresponding to a focal point, based on the object scene image generated by the image sensor. However, the CPU has a high-luminance excluding function for excluding from a target to be noticed of the AF process a partial image having a luminance exceeding “TH1” out of the object scene image generated by the image sensor. The CPU determines whether or not a partial image having a luminance exceeding “TH2” larger than “TH1” exists on the object scene image generated by the image sensor, and turns on the high-luminance excluding function when a determination result is affirmative and turns off the high-luminance excluding function when the determination result is negative.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: June 25, 2013
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Kazuhiro Tsujino, Daisuke Mizuguchi
  • Patent number: 8334923
    Abstract: A digital camera has an optical system, an image capturing unit, an aperture adjuster, a focal point adjuster, and a body microcomputer. The aperture adjuster has an aperture included in the optical system and is capable of adjusting the state of the aperture. The focal point adjuster has a focus lens included in the optical system and is capable adjusting the focal state of the optical system by using the focus lens by contrast detection method. The body microcomputer controls the operation of the aperture adjuster so that the aperture value of the optical system will be at or below a set aperture value before the focal state is adjusted by the focal point adjuster.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: December 18, 2012
    Assignee: Panasonic Corporation
    Inventor: Naoto Yumiki
  • Patent number: 8254773
    Abstract: An image apparatus includes a screen, a detecting unit, a determining unit, an acquiring unit and a control unit. The screen is configured to display an image formed by an optical system and at least one detection position superimposed onto the image. The detecting unit is configured to detect information regarding focus of the optical system at the detection position. The determining unit is connected to the detecting unit and configured to determine whether the information regarding the focus is within a predetermined range. The acquiring unit is connected to the determining unit and configured to acquire first image information at the detection position when the determining unit determines that the information regarding the focus is within the predetermined range. The control unit is connected to the acquiring unit and configured to evaluate arbitrary second image information in the screen using the first image information.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: August 28, 2012
    Assignee: Nikon Corporation
    Inventor: Keiko Muramatsu
  • Patent number: 8213784
    Abstract: There is provided an apparatus that includes a receiving unit configured to receive instructions for focus adjustment; an image-pickup unit configured to perform image-pickup of an object image input through a focus lens; a setting unit configured to set a focus detecting area to be used at a time of detection of a focus state of the focus lens; a light control unit configured to control an amount of light incident on the image-pickup unit; and a focus adjusting unit configured to detect a focus signal representing the focus state in the focus detecting area to move the focus lens based on the focus signal and a position of the focus lens corresponding to the focus signal.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: July 3, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroyuki Ogino
  • Patent number: 8139140
    Abstract: A digital camera has an optical system, an image capturing unit, an aperture adjuster, a focal point adjuster, and a body microcomputer. The aperture adjuster has an aperture included in the optical system and is capable of adjusting the state of the aperture. The focal point adjuster has a focus lens included in the optical system and is capable adjusting the focal state of the optical system by using the focus lens by contrast detection method. The body microcomputer controls the operation of the aperture adjuster so that the aperture value of the optical system will be at or below a set aperture value before the focal state is adjusted by the focal point adjuster.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: March 20, 2012
    Assignee: Panasonic Corporation
    Inventor: Naoto Yumiki
  • Patent number: 8115814
    Abstract: An apparatus and method to track and to photograph a mobile object over a wide range, by a cooperative operation of multiple cameras. In addition, a mobile tracking system is provided for tracking the mobile object by the cooperation of multiple cameras, in which each camera includes a photographing device which photographs and recognizes the mobile object, a changing device which changes a view angle of the photographing device, a position deriving device which derives a position of the camera, a distance deriving device which derives the distance between the camera and the mobile object, and a communication device which transmits an identifier of the camera, a position of the camera, a moving direction of the mobile object and the distance between the camera and the mobile object to another camera and receives an identifier of the other camera, a position of the other camera, a moving direction of the mobile object and a distance between the other camera and the mobile object from the other camera.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: February 14, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshihiko Iwase, Masaaki Imaizumi
  • Publication number: 20120027393
    Abstract: An electronic equipment includes a digital focus portion that adjusts an in-focus state of a target image by image processing, and a unit adjustment amount setting portion that sets a unit adjustment amount in adjustment of the in-focus state based on distance information of the target image.
    Type: Application
    Filed: July 22, 2011
    Publication date: February 2, 2012
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Yoshiyuki TSUDA, Masahiro Yokohata, Haruo Hatanaka
  • Patent number: 8090246
    Abstract: A system having a sensor and variable focus lens for iris image standoff acquisition. The sensor may capture a sequence of images at a high frame rate of a person for getting an eye or an iris in a window within the images. Even if the eye moves around in the image, the window may stay on the eye. During this capture, the focus of the lens may be changed, with a best focus situated somewhere in between the end focus positions of the lens. The sensor may be an infrared (IR) sensor and an IR illuminator or flash may provide light for the capture of images. An intensity variance indicator may be incorporated to select an in-focus image of the sequence. Processing of the images may be subsequent to the capture of images, thus not hindering the frame rate of the system.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: January 3, 2012
    Assignee: Honeywell International Inc.
    Inventor: Jan E. Jelinek
  • Patent number: 8026973
    Abstract: An imaging apparatus comprises a focusing unit configured to focus an object to be shot by an imaging unit, a first shooting control unit configured to control the imaging unit in order to continuously shooting at first time intervals upon detecting a shooting instruction, a determining unit configured to determine whether the object moves in a distance direction during a control operation of the first shooting control unit, and a second shooting control unit configured to control the imaging unit in order to continuously shoot at second time intervals and to control the focusing unit in order to focus the object when the determining unit determines that the object moves in the distance direction.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: September 27, 2011
    Assignee: Casio Computer Co., Ltd.
    Inventor: Takashi Onoda
  • Patent number: 7995131
    Abstract: An imaging device includes a capturing module with at least one lens for capturing an image from a scene, a driving module for driving the at least one lens to different focusing positions using different driving steps, a flat-scene judging module, and a step-judging module. The flat-scene judging module divides the image into a central area and a plurality of peripheral areas, and determines whether the captured scene is a flat scene according to the divided image. The step-judging module determines whether the driving steps corresponding to a maximum focusing value of the central area of the image are same as driving steps corresponding to respective maximum focusing values of the peripheral areas of image, and changes the driving steps corresponding to the maximum focusing value of the central area to the driving steps corresponding to the greatest one of the maximum focusing values of the peripheral areas.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: August 9, 2011
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chun-Nan Yeh
  • Patent number: 7991280
    Abstract: There is provided an apparatus that includes a receiving unit configured to receive instructions for focus adjustment; an image-pickup unit configured to perform image-pickup of an object image input through a focus lens; a setting unit configured to set a focus detecting area to be used at a time of detection of a focus state of the focus lens; a light control unit configured to control an amount of light incident on the image-pickup unit; and a focus adjusting unit configured to detect a focus signal representing the focus state in the focus detecting area to move the focus lens based on the focus signal and a position of the focus lens corresponding to the focus signal.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: August 2, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroyuki Ogino
  • Publication number: 20110184236
    Abstract: An imaging apparatus includes an imaging section that images an object, an observation mode setting section that sets an observation mode when the imaging section images the object, and a control section that controls an image read mode in which an image is read from the imaging section and a in-focus object plane of the imaging section based on the observation mode set by the observation mode setting section.
    Type: Application
    Filed: January 25, 2011
    Publication date: July 28, 2011
    Applicant: OLYMPUS CORPORATION
    Inventor: Koichiro YOSHINO
  • Patent number: 7986874
    Abstract: A method and a camera device that includes a proximity sensor that senses a current distance between a user and the camera device. The method and camera device acquires the current distance sensed by the proximity sensor, and triggers the camera device to take a photo of an object when the current distance is less than a preset distance of the camera device.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: July 26, 2011
    Assignee: Chi Mei Communication Systems, Inc.
    Inventors: Che-Hsiung Cheng, Hsiu-Min Cheng
  • Publication number: 20110158623
    Abstract: A method and a camera device that includes a proximity sensor that senses a current distance between a user and the camera device. The method and camera device acquires the current distance sensed by the proximity sensor, and triggers the camera device to take a photo of an object when the current distance is less than a preset distance of the camera device.
    Type: Application
    Filed: February 8, 2010
    Publication date: June 30, 2011
    Applicant: CHI MEI COMMUNICATION SYSTEMS, INC.
    Inventors: CHE-HSIUNG CHENG, HSIU-MIN CHENG
  • Publication number: 20110058096
    Abstract: A fast focusing method for a digital camera is applied in an auto focusing stage for judging whether the digital camera needs to be refocused. The fast focusing method includes recording a system time after a previous focusing (defined as a first time); capturing a system time before a current focusing (defined as a second time); performing a fuzziness detection procedure to acquire a focus value when a difference obtained by subtracting the first time from the second time is greater than a focusing time threshold; setting a focusing focal length range covering a reference focal length when the focus value is between a lower limit focusing threshold and an upper limit focusing threshold; capturing images at different focusing focal lengths respectively in the focusing focal length range; calculating a contrast value of each image; calculating a target focal length from the contrast values through a quadratic curve approximation method.
    Type: Application
    Filed: May 21, 2010
    Publication date: March 10, 2011
    Applicant: ALTEK CORPORATION
    Inventors: Chan Min Chou, Chia Lun Tsai, Chih Pin Yen
  • Patent number: 7835637
    Abstract: Techniques are described for predictive focus value calculation within image capture devices. Image capture devices may include digital still cameras and digital video cameras. The techniques include performing an auto-focus process within an image capture device by predicting a focus value for a scene at a lens position of a lens included in the image capture device based on a corrupt focus value for the lens position calculated from a first frame directly after lens settlement. Therefore, the auto-focus process may determine size and direction of movement for the lens to a next lens position based on the predicted valid focus value, and move the lens to the next lens position during a second frame. In this way, the techniques may move the lens to another lens position during each frame, greatly reducing auto-focus latency by potentially doubling or tripling the speed of the auto-focus process.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: November 16, 2010
    Assignee: QUALCOMM Incorporated
    Inventors: Jingqiang Li, Szepo Robert Hung, Ying Xie Noyes, Chinchuan Andrew Chiu
  • Patent number: 7725018
    Abstract: A range in which a focus lens is to be moved is set; the focus lens is moved within the set range; an in-focus state is determined based on output signals from an image sensing unit which are obtained in association with the movement of the focus lens within the range; and the focus lens is driven so that an object image is brought into focus. When a difference between the positions of the focus lens, at which the plurality of images are brought into focus, is equal to or lower than a preset threshold, the range will be set to be wider than a range in the case where the difference exceeds the threshold.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: May 25, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazuki Konishi
  • Patent number: 7639937
    Abstract: A method and apparatus for accurately auto focusing a lens of an imaging device. In an exemplary embodiment, an imaged scene is split into an array of zones. The minimum and maximum sharpness score for each zone is determined over a plurality of lens positions. A histogram of the lens positions of the corresponding maximum sharpness score for each zone is created. The peak of the histogram is determined to be the best focus position for a given scene.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: December 29, 2009
    Assignee: Aptina Imaging Corporation
    Inventor: Igor Subbotin
  • Patent number: 7634188
    Abstract: A method comprises receiving a focusing image and shifting the focusing image to obtain a shifted focusing image. In the method, a focus metric of the focusing image is calculated from the focusing image and the shifted focusing image, where the focus metric is configured for use as a factor in making an automatic focus adjustment determination. An automatic focusing apparatus includes a controller configured to implement the method.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: December 15, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Ayelet Pnueli, Mani Fischer
  • Patent number: 7616875
    Abstract: An imaging device includes an imaging element that receives a subject light flux from an imaging lens that forms a subject image, and converts the subject light flux to an electrical signal; and a control device that selects one of first imaging preparatory processing for executing imaging preparatory processing based upon an output signal from the imaging element and second imaging preparatory processing for executing imaging preparatory processing based upon an output signal from a light receiving element other than the imaging element in correspondence to an extent of decentering of the imaging lens.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: November 10, 2009
    Assignee: Nikon Corporation
    Inventor: Takayuki Uchiyama
  • Patent number: 7570298
    Abstract: An image-taking apparatus which reduces occurrence of unnatural focus changes is disclosed. The image-taking apparatus includes a first detector which outputs a first signal representing a focus state of an image-taking optical system based on a predetermined-frequency component of an output signal of the image-pickup device and a second detector which outputs a second signal different from the first signal. The image-taking apparatus also includes has a controller which performs a first focus control for controlling drive of the focus lens based on the first signal and a second focus control for controlling drive of the focus lens based on the second signal. The controller performs the second focus control in a case where an in-focus state cannot be achieved with the first focus control.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: August 4, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hitoshi Yasuda
  • Patent number: 7548686
    Abstract: An image-capturing apparatus for controlling a drive system for an optical system corresponding to the position of an operation unit includes a motor for driving a control target of the drive system, a driver for the motor, position detecting means for detecting the position of the operation unit, position generating means for generating the output corresponding to the position of the operating unit with a limited movable range by configuring an initialization value and maximum and minimum values of integrated displacement by the output of the position detecting means, and controlling means for controlling the motor via the driver so as to drive the control target corresponding to the position generating output of the operating unit.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: June 16, 2009
    Assignee: Sony Corporation
    Inventor: Hidenori Kushida
  • Publication number: 20090116829
    Abstract: A method and apparatus for accurately auto focusing a lens of an imaging device. An imaged scene is split into an array of zones. The minimum and maximum sharpness score for each zone is determined over a plurality of lens positions. A histogram of the lens positions of the corresponding maximum weighted sharpness score for each zone is created. The peak of the histogram is determined to be the best focus position for a given scene.
    Type: Application
    Filed: December 2, 2008
    Publication date: May 7, 2009
    Inventor: Igor Subbotin
  • Patent number: 7519285
    Abstract: At least one exemplary embodiment is directed to an imaging apparatus including: a detecting device; a selecting device; a determining device; and a instructing device configured to instruct the determining device to display on an imaging screen at least one AF frame determined to be within a focusing range, where the focusing range is the range of a positions of an imaging optical system positioned within a predetermined depth of focus of a focusing position selected by the selecting device.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: April 14, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazunori Ishii
  • Patent number: 7505678
    Abstract: A control apparatus for controlling a driver driving an optical element of an image pickup device to adjust a focus position of the image pickup device in the capturing of an image of a subject, includes a focus position control process startup unit for managing a startup of a focus position control process, a focus position control process executing unit for executing the focus position control process that is started under the control of the focus position control process startup unit, and a startup condition adjusting unit for adjusting a startup condition of the focus position control process, based on a change in a saturated luminance count contained in the image captured in the focus position control process.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: March 17, 2009
    Assignee: Sony Corporation
    Inventors: Hidekazu Suto, Yujiro Ito, Shinji Takemoto
  • Patent number: 7474846
    Abstract: A method and apparatus for accurately auto focusing a lens of an imaging device. An imaged scene is split into an array of zones. The minimum and maximum sharpness score for each zone is determined over a plurality of lens positions. A histogram of the lens positions of the corresponding maximum weighted sharpness score for each zone is created. The peak of the histogram is determined to be the best focus position for a given scene.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: January 6, 2009
    Assignee: Micron Technology, Inc.
    Inventor: Igor Subbotin
  • Patent number: 7432975
    Abstract: Provided are an automatic focusing method in which a photograph region is brought into focus through automatic movement of a focal lens to a focal position, in response to a photographing-command signal, and a digital photographing apparatus using the method. The method includes dividing the photograph region into a plurality of sub-regions, focusing on the sub-regions and obtaining focal position values DSFOC, calculating an average focal position value ADSFOC of the focal position values DSFOC, selecting focal position values DSFOC whose differences from the average focal position value ADSFOC are equal to or less than a threshold value DTH, and moving the focal lens to a focal position corresponding to the focal position value DSFOC having the shortest focal distance among the selected focal position values DSFOC.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: October 7, 2008
    Assignee: Samsung Techwin Co., Ltd.
    Inventor: Jeong-ho Lee
  • Publication number: 20080037974
    Abstract: Provided are a discrete AF control method and an error correcting method of a camera module using a diffraction device. In the method, a focus is moved to a (the number of all positions/m)-th position, and a focusing value at a start position is compared with that at the (the number of all positions/m)-th position. A focus is moved by two positions in a first direction according to the comparison result. If a position having a maximum focusing value is passed, a focus is moved by one position in a direction opposite to the first direction and a location (corresponding to an n-th position) is stored. Focusing values of the n-th position, an (n-1)-th position, and an (n-2)-th position are compared with one another to determine a maximum focus location, m being an integer equal to or greater than 2.
    Type: Application
    Filed: August 7, 2007
    Publication date: February 14, 2008
    Inventor: Yong Seok CHI
  • Publication number: 20080031611
    Abstract: A range in which a focus lens is to be moved is set; the focus lens is moved within the set range; an in-focus state is determined based on output signals from an image sensing unit which are obtained in association with the movement of the focus lens within the range; and the focus lens is driven so that an object image is brought into focus. When a difference between the positions of the focus lens, at which the plurality of images are brought into focus, is equal to or lower than a preset threshold, the range will be set to be wider than a range in the case where the difference exceeds the threshold.
    Type: Application
    Filed: July 23, 2007
    Publication date: February 7, 2008
    Applicant: Canon Kabushiki Kaisha
    Inventor: Kazuki Konishi
  • Patent number: 7262804
    Abstract: A CPU calculates integrating values of image-capturing signals in a band 1 obtained by removing through a band pass filter a low frequency component of image-capturing signal output from an image-capturing device and integrating values of the image-capturing signals in a band 3 retaining the low frequency component intact, each calculated in correspondence to one of a plurality of lens positions. The CPU then obtains focal point evaluation values based upon these integrating values in correspondence to the individual bands. In addition, when it is judged that the image-capturing signals are saturated, the CPU calculates a new evaluation value parameter 1 history record=(focal point evaluation value history record in band 3?focal point evaluation value history record in band 1). The CPU then determines a new evaluation value parameter 1 history record extremal value through a 3-point interpolation operation and calculates a lens position corresponding to the extremal value.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: August 28, 2007
    Assignee: Nikon Corporation
    Inventor: Toshimi Watanabe
  • Patent number: 7210798
    Abstract: The methods and apparatus for lighting systems provide a camera integral to a particular image projection lighting device (IPLD) to capture the projected image from the particular IPLD. The captured image can then be sent over a communication system to the operator for viewing on a visual display device such as a computer monitor on a central controller. Using the captured image of the projected image as viewed upon the display device, the operator may then command using the central controller the focusing, position or other parameters of the projected image upon the stage or projection surface to the desired value. The captured image may also be used, such as by a central control system, to automatically, and without operator intervention, adjust parameters of the IPLD to desired values.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: May 1, 2007
    Assignee: High End Systems Inc.
    Inventors: Richard S. Belliveau, Vickie Lynn Claiborne, Timothy G. Grivas, Brian Emerson Jurek, Jeffrey K. Washburn
  • Patent number: 7095001
    Abstract: An image sensing apparatus performs a plurality of times of image sensing on a subject, superpose-combines the obtained plurality of subject images into one subject image. The apparatus has an image sensing unit that converts a subject optical image into an electric signal, an optical unit that changes a view angle, and a change unit that changes the position of the optical unit by a predetermined amount so as to widen the view angle by a predetermined amount, prior to the plurality of times of image sensing.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: August 22, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hideo Kawahara
  • Patent number: 6970646
    Abstract: A digital camera has distance measurement zone setting means (12) for dividing distance to a subject into a plurality of distance measurement zones; distance measurement zone selection means (13) for selecting a distance measurement zone to be scanned; an autofocus evaluation value calculation circuit (14) for acquiring an AF evaluation value by scanning the selected distance measurement zone; zone-update determination means (15) for determining, through use of the AF evaluation value, whether or not to update a distance measurement zone to be scanned; and in-focus position decision means (16) for appropriately updating the scanned distance measurement zone based upon the determination as to whether to update the distance measurement zone, and deciding an in-focus position based upon acquisition of AF evaluation value. A focusing lens (2) is driven to the in-focus position by a focusing-lens drive circuit (17).
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: November 29, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shinya Hirai
  • Patent number: 6867799
    Abstract: A method for holding an object of interest in a field of view of a movable video camera, the object of interest being selected from a plurality of moving objects detected in the field of view, is taught. An indication of the object of interest is received and is used to predict a future position thereof. Movement commands for the camera are created based on the future position of the object of interest such that the object of interest remains in the field of view of the camera.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: March 15, 2005
    Assignee: Sensormatic Electronics Corporation
    Inventor: Raymond M. Broemmelsiek
  • Patent number: 6317563
    Abstract: A focusing device has a first unit for producing information for focusing an optical unit and a second unit for forming, based on a predetermined number of pieces of the information derived from the first unit, an operation instruction signal for operating the optical unit. The second unit, when an actuating signal is input while a number of pieces of information from the first unit is still smaller than the predetermined number, forms the operation instruction signal based on a smaller number of pieces of information than the predetermined number.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: November 13, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazuyuki Maeda
  • Patent number: 5844726
    Abstract: A position detecting device includes a moving body, and a detection mechanism which detects a moving position of the moving body on the basis of a level of a detection signal, wherein a peak value of the level of the detection signal is set to be obtained at an intermediate point within a moving range of the moving body.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: December 1, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hidetoshi Masuda
  • Patent number: 5842059
    Abstract: An automatic focus adjusting device for automatically adjusting focus by using a predetermined signal component of a picked-up image signal outputted from an image sensor is arranged to find the state of an object from information on the distribution of frequencies within a DCT block and to control a focus adjusting action according to the state of the object found, so that focus adjustment can be stably performed without any erroneous operation.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: November 24, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hirofumi Suda
  • Patent number: 5839003
    Abstract: A focus adjustment method and apparatus use statistical methods to discriminate whether an out-of-focus condition is the result of minor fluctuation or is the result of a significant change in object image condition (distance, etc.) requiring a focus adjustment. This results in good hunting suppression without sacrificing good focus adjustment performance, and flexibly adapts to different object conditions. The focus adjustment method and apparatus drive the optical system to an in-focus state based on detected focus information, and perform statistical analysis of successive focus information inputs to compute a variance value. Driving of the optical system to correct focus recommences when the defocus amount exceeds a predetermined threshold value based on the variance value.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: November 17, 1998
    Assignee: Nikon Corporation
    Inventor: Touru Iwane
  • Patent number: RE36546
    Abstract: An automatic focusing device, in which a focus lens is driven for tracking an object-in-motion to obtain an in-focus state, based upon a focus prediction that is executed from repeated distance measurements. Tracking is continued even if the position of the focus lens falls into the predetermined focus allowance, so as to make it possible to take a well-focused photograph at any time.
    Type: Grant
    Filed: November 24, 1995
    Date of Patent: February 1, 2000
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventor: Yukio Uenaka