Using Test Chart Patents (Class 348/188)
  • Patent number: 10281674
    Abstract: An adjustable optical lens and camera module and manufacturing method thereof are provided, wherein the camera module includes an optical sensor and an adjustable optical lens. The adjustable optical lens, which is arranged in a photosensitive path of the optical sensor, includes an optical structural member and at least two lenses. Each of the lens is arranged in an internal space of the optical structural member along an axial direction of the optical structural member, wherein before packaging the adjustable optical lens and the optical sensor, at least one position of the lens in the internal space of the optical structural member is able to be adjusted, so that a central axis line of the adjustable optical lens and a central axis line of the optical sensor are coincided, so as to improve the image quality of the camera module.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: May 7, 2019
    Assignee: Ningbo Sunny Opotech Co., Ltd.
    Inventors: Mingzhu Wang, Bojie Zhao, Liang Ding, Chunmei Liu, Feifan Chen, Nan Guo, Heng Jiang
  • Patent number: 10237545
    Abstract: An image pickup module test system includes a computing device, an optical reflector, a block gauge and a fixing device. A test program is executed in the computing device. The image pickup module is fixed at a position in front of the optical reflector by the fixing device. The image pickup device acquires an image of the image pickup module and the block gauge that is reflected from the optical reflector. The test program analyzes the image to obtain a feature point of the image pickup module and a feature point of the block gauge. Moreover, the test program judges whether an installation location of at least one lens unit of the image pickup module complies with a production specification according to the standard length value corresponding to the single pixel of the image and the feature point of the image pickup module.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: March 19, 2019
    Assignee: PRIMAX ELECTRONICS LTD
    Inventors: Shih-Jung Huang, Sheng-Chi Chan
  • Patent number: 10209091
    Abstract: A measurement tool includes a first member and a measurement member. The first member has a surface including a chart to be used for calibration of a stereo camera. The measurement member is arranged on the surface of the first member. The measurement member includes a light source and a second member. The light source is configured to emit light with a uniform intensity regardless of a position on the surface. The second member is configured to cover the light source and radiate the light from a plurality of first holes and a plurality of second holes having a size larger than the first hole.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: February 19, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Katsunobu Yoshida, Shin Aoki
  • Patent number: 10187636
    Abstract: For aligning an image sensor relative to a lens module prior to fixing the image sensor to the lens module, an exposure of the image sensor is turned on and the image sensor is moved to different distances relative to the lens module. At certain predetermined distances between the image sensor and the lens module, a calibration pattern is illuminated and two or more pictures of the calibration pattern which is focused through the lens module are captured with the image sensor to produce at least two pictures of the calibration pattern captured at different distances, the at least two pictures being superimposed onto a calibration image. The exposure of the image sensor is then turned off and the pictures of the calibration pattern are analyzed for determining an alignment between the lens module and the image sensor.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: January 22, 2019
    Assignee: ASM TECHNOLOGY SINGAPORE PTE LTD
    Inventors: Chi Shing Wong, Fan Leuk Lai, Po Lam Au, Jiangwen Deng, Wing Hong Leung
  • Patent number: 10108306
    Abstract: Systems and methods for redacting information from data records are provided. Data records are recorded by recording devices, including, but not limited to, camera recording devices such as those associated with law-enforcement officers. The data records are stored in an evidence management system. In response to requests for records, including but not limited to Freedom of Information Act (FOIA) requests, the evidence management system creates redacted versions of the data records. Public access may then be provided to the redacted data records. In some embodiments, automated bulk redaction may be applied to video data records by applying a video filter to the entire visual field of the video information. In some embodiments, access to the redacted data records may be provided via a cloud storage system or via a removable computer-readable storage medium.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: October 23, 2018
    Assignee: AXON ENTERPRISE, INC.
    Inventors: Aaron Khoo, Abraham Alvarez Zayas, Marcus W.L. Womack, James N. Reitz
  • Patent number: 10102631
    Abstract: A distance in a scanning direction between a first set of edges which face each other and exhibit an opposite change between light and dark is measured by an image measuring machine, and a bias correction value is calculated based on a difference between a measured value and a true value. Using the bias correction value, detection point correction values, which are correction values in various directions of edge detection points detected by a scan of a measured object using the image measuring machine, are calculated; a correction amount used in correction of the edge detection points is specified based on the detection point correction value in each direction; and the edge detection points are corrected using the correction amount.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: October 16, 2018
    Assignee: MITUTOYO CORPORATION
    Inventors: Hiroyuki Yoshida, Akira Takada, Makoto Kaieda, Gyokubu Cho, Koichi Komatsu, Hidemitsu Asano, Takashi Hanamura, Takuho Maeda, Isao Tokuhara
  • Patent number: 10079981
    Abstract: Disclosed in an embodiment of the present invention is an image dynamic range adjustment method, the method comprising: decoding a to-be-adjusted image selected by a user into YUV data; performing regional partition on the to-be-adjusted image according to a predetermined division policy and the YUV data, and obtaining a Y component reference value corresponding to at least one region; adjusting the YUV data corresponding to each region of the at least one region according to an adjusting coefficient, to obtain the adjusted YUV data of each of the regions, the adjusting coefficient being obtained on the basis of the Y component reference value; obtaining the image after the dynamic range adjustment on the basis of the adjusted YUV data. Also disclosed in the embodiment of the present invention are a terminal and a storage media.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: September 18, 2018
    Assignee: ZTE Corporation
    Inventor: Dewei Ji
  • Patent number: 10015482
    Abstract: An image sensor includes a substrate including an active pixel and a test pattern, wherein the test pattern is located adjacent to the active pixel, wherein the active pixel comprises a first photodiode, a floating diffusion, a first channel provided between the first photodiode and the floating diffusion, and a first transfer gate electrode provided over the first channel, wherein the test pattern comprises a first test photodiode, a test floating diffusion, a second channel provided between the first test photodiode and the test floating diffusion, a first test transfer gate electrode provided over the second channel, and a first contact plug connected to the first test photodiode, and wherein the first test photodiode, the test floating diffusion, the second channel, and the first test transfer gate have substantially the same alignment errors as the first photodiode, the floating diffusion, the first channel, and the first transfer gate electrode, respectively.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: July 3, 2018
    Assignee: SK Hynix Inc.
    Inventors: Yun-Hui Yang, Donghyun Woo, Jong-Chae Kim
  • Patent number: 9922274
    Abstract: A test apparatus comprising a portable reference element having color and spectrophotometrically neutral gray elements of predetermined hues and saturations, and a digital software file provides identical color and spectrophotometrically neutral grayscale data which, when printed or otherwise reproduced accurately, may be compared with the test colors and grayscale provided by the portable reference element, enabling appropriate adjustments to be made to the printer as required.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: March 20, 2018
    Inventor: Ferrand D. E. Corley
  • Patent number: 9894350
    Abstract: Camera and/or lens calibration information is generated as part of a calibration process in video systems including 3-dimensional (3D) immersive content systems. The calibration information can be used to correct for distortions associated with the source camera and/or lens. A calibration profile can include information sufficient to allow the system to correct for camera and/or lens distortion/variation. This can be accomplished by capturing a calibration image of a physical 3D object corresponding to the simulated 3D environment, and creating the calibration profile by processing the calibration image. The calibration profile can then be used to project the source content directly into the 3D viewing space while also accounting for distortion/variation, and without first translating into an intermediate space (e.g., a rectilinear space) to account for lens distortion.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: February 13, 2018
    Assignee: NextVR Inc.
    Inventors: David Cole, Alan McKay Moss, Hector M. Medina
  • Patent number: 9743058
    Abstract: Systems for automatic white balancing (AWB) of a digital image and methods for making and using same. In response to a white balancing trigger, the relative positions of an image sensor and a reference region for white balancing are automatically adjusted such that the image sensor can acquire an image of the reference region. A white balance parameter reflecting the color temperature of the illuminating source is then computed and used to perform white balancing so as to remove color casts. The position of the reference region can be pre-recorded or scanned-for by the image sensor. The reference region can be rendered mobile so that it can be positioned within the image sensor's field-of-vision. The imaging systems can further include a gimbal that enables the image sensor to rotate about one or more axes. The present systems and methods are suitable for use, for example, by unmanned aerial vehicles (UAVs).
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: August 22, 2017
    Assignee: SZ DJI TECHNOLOGY CO., LTD.
    Inventor: Mingyu Wang
  • Patent number: 9706197
    Abstract: Systems and methods for testing a light emitting device are described. A processing device receives image data from an image capturing device of an electronic device. The image data represents of an image of a projection, on a projection surface, of beam of light emitted by a light emitting device of the electronic device. The processing device determines one or more imaging calibration parameters based on the image.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: July 11, 2017
    Assignee: Amazon Technologies, Inc.
    Inventors: Hyuk-Joon Oh, Eddie Alex Azuma
  • Patent number: 9621874
    Abstract: A multiple imager camera includes a block, an imager, and an alignment apparatus. The block is configured to direct an image to a plurality of imagers located proximate to a plurality of apertures defined by the block. The imager of the plurality of imagers is configured to receive the image through an aperture of the plurality of apertures. The alignment apparatus is interposed between the block and the imager. The alignment apparatus is configured to allow for six degrees of freedom to align the imager with the image. The six degrees of freedom include adjustment along a x-axis, a y-axis, and a z-axis of the aperture, and adjustment about a pitch-axis, a yaw-axis, and a roll-axis of the aperture. The alignment apparatus is further configured to fixedly couple the imager to the block after the imager is aligned with the image.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: April 11, 2017
    Assignee: Delphi Technologies, Inc.
    Inventors: Daniel Leong Woon Loong, Kok Wee Yeo, Yew Kwang Low, Ronald M. Taylor, Thomas A. Degenkolb, Ward K. Everly, Morgan D. Murphy
  • Patent number: 9591300
    Abstract: The technology disclosed relates to scoring user experience of video frames displayed on a mobile or other video display device. In particular, it relates to capture alignment and test stimulus isolation techniques that compensate for artifacts in the capture mechanism. The technology disclosed includes methods and systems for analyzing both downlink and uplink quality for mobile or other video display device cameras capturing and transmitting video frames including teleconference video display. Particular aspects of the technology disclosed are described in the claims, specification and drawings.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: March 7, 2017
    Assignee: SPIRENT COMMUNICATIONS, INC.
    Inventor: Predrag Djurdjevic
  • Patent number: 9517725
    Abstract: An auto revising system for around view monitoring (AVM) includes: one or more target members provided in a space in which a vehicle is assembled, as a reference for a position of the vehicle; a control unit configured to control an AVM system which is installed in the vehicle; and a revising robot unit configured to interface with the control unit to automatically revise a screen of the AVM system based on the one or more target members.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: December 13, 2016
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Dong Myong Kim
  • Patent number: 9412164
    Abstract: A reference set of image features is determined from an electronic data file specifying a reference image in a reference coordinate space. Rendering information describing a physical rendering of the reference image is ascertained. Calibration-enabling data is derived from the reference set of the image features and the ascertained rendering information. The calibration-enabling data is provided to calibrate an imaging system. The calibration-enabling data may be stored. The imaging system may capture an image of the physical rendering of the reference image in relation to a capture coordinate space. An extracted set of image features may be extracted from the captured image. Respective ones of the image features in the reference and extracted sets may be matched. The imaging system may be calibrated based on matched ones of the image features and the rendering information.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: August 9, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Nelson Liang An Chang, Suk Hwan Lim, Feng Tang
  • Patent number: 9380297
    Abstract: The technology disclosed relates to scoring user experience of video frames displayed on a mobile or other video display device. In particular, it relates to capture alignment and test stimulus isolation techniques that compensate for artifacts in the capture mechanism. The technology disclosed includes methods and systems for analyzing both downlink and uplink quality for mobile or other video display device cameras capturing and transmitting video frames including teleconference video display. Particular aspects of the technology disclosed are described in the claims, specification and drawings.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: June 28, 2016
    Assignee: SPIRENT COMMUNICATIONS, INC.
    Inventor: Predrag Djurdjevic
  • Patent number: 9307214
    Abstract: A brightness-sensitive automatic white balance method includes (a) determining the brightness of a scene captured in an electronic color image, (b) selecting a color-weighting map based upon the brightness of the scene, (c) extracting auto white balance parameters from the color-weighting map, and (d) white balancing the electronic color image according to the auto white balance parameters. An adaptive automatic white balance method includes (a) refining, based upon a first electronic color image of a scene illuminated by an illuminant of a first spectral type, a color-weighting probability distribution for the illuminant of the first spectral type, wherein the color-weighting probability distribution may be brightness-specific, (b) extracting auto white balance parameters from the refined color-weighting probability distribution, and (c) white balancing, according to the auto white balance parameters, an electronic color image of a scene illuminated by the illuminant of the first spectral type.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: April 5, 2016
    Assignee: OmniVision Technologies, Inc.
    Inventors: Changmeng Liu, Chengming Liu, Jizhang Shan
  • Patent number: 9307215
    Abstract: A system for brightness-sensitive automatic white balancing of an electronic color image includes a processor and a memory with (a) brightness-specific color-weighting maps each specifying illuminant-specific auto white balance parameters, (b) brightness range definitions respectively indicating applicability range of the brightness-specific color-weighting maps, and (c) instructions for white balancing the electronic color image according to scene brightness and based upon the brightness-specific color-weighting maps.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: April 5, 2016
    Assignee: OmniVision Technologies, Inc.
    Inventors: Changmeng Liu, Chengming Liu, Jizhang Shan
  • Patent number: 9270866
    Abstract: A method for calibrating auto white balancing in an electronic camera includes (a) obtaining a plurality of color values from a respective plurality of images of real-life scenes captured by the electronic camera under a first illuminant, (b) invoking an assumption about a true color value of at least portions of the real-life scenes, and (c) determining, based upon the difference between the true color value and the average of the color values, a plurality of final auto white balance parameters for a respective plurality of illuminants including the first illuminant. An electronic camera device includes an image sensor for capturing real-life images of real-life scenes, instructions including a partly calibrated auto white balance parameter set and auto white balance self-training instructions, and a processor for processing the real-life images according to the self-training instructions to produce a fully calibrated auto white balance parameter set specific to the electronic camera.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: February 23, 2016
    Assignee: OmniVision Technologies, Inc.
    Inventor: Changmeng Liu
  • Patent number: 9213228
    Abstract: A device and a method are described for measuring a camera having an image sensor, in particular a fixed-focus camera, the device including: a camera support for accommodating at least one camera to be tested in at least one camera position, a collimator device for emitting collimator light of a test pattern having different object distances, a mirror system for deflecting the collimator light to the camera position, the mirror system having at least one first mirror device which is pivotable by a mirror adjustment device into multiple pivot positions, and a second mirror device having multiple second mirror units, the second mirror units reflecting the light emitted by the first mirror device in its different pivot positions to the camera position for imaging the test pattern in different image regions of an image sensor.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: December 15, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventors: Uwe Apel, Carina Raizner
  • Patent number: 9177191
    Abstract: A fingerprint sensing module includes a sensor substrate having a sensing side and a circuit side, an image sensor including conductive traces on the circuit side of the sensor substrate, and a sensor circuit including at least one integrated circuit mounted on the circuit side of the sensor substrate and electrically connected to the image sensor. The sensor substrate may be a flexible substrate. The module may include a velocity sensor on the sensor substrate or on a separate substrate. The module may further include a rigid substrate, and the sensor substrate may be affixed to the rigid substrate.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: November 3, 2015
    Assignee: Synaptics Incorporated
    Inventor: Fred G Benkley, III
  • Patent number: 9161027
    Abstract: A method for providing a camera calibration includes recovering geometric information from a single rectangular image, obtaining intrinsic and extrinsic construction information of a camera based on the recovered geometric information, obtaining a shooting position and real geometric information of the camera from the obtained intrinsic and extrinsic construction information of the camera.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: October 13, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Joo-Haeng Lee, Hyun Kim, Hyoung Sun Kim
  • Patent number: 9060164
    Abstract: A method for determining a response to misalignment of a camera monitoring a desired area includes acquiring temporal related frames from the camera including a reference frame. A pixel location is determined of a reference object from the frames. Using the pixel location of the reference object, a displacement of the camera between a current frame and the reference frame is determined. For the displacement exceeding a first threshold, a new displacement of the camera is measured by introducing at least one additional object to a camera field of view and comparing the new displacement to a second threshold. For the new displacement not exceeding the second threshold, the camera is recalibrated using a determined pixel location and a physical location of the at least one additional object. For the new displacement exceeding the second threshold, notification is provided of a misalignment to an associated user device.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: June 16, 2015
    Assignee: Xerox Corporation
    Inventors: Wencheng Wu, Edul N. Dalal
  • Patent number: 9041815
    Abstract: An operator friendly camera testing module is described. The camera testing module includes at least a color shift evaluation unit and a color non-uniformity evaluation unit. The color shift evaluation unit providing a color shift metric and the color non-uniformity evaluation unit providing a color non-uniformity metric each used to characterize a digital camera.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: May 26, 2015
    Assignee: Apple Inc.
    Inventors: Hongqin Zhang, Shizhe Shen, Michael DiVincent, Chong Yip Chow
  • Publication number: 20150138372
    Abstract: A device and a method are described for measuring a camera having an image sensor, in particular a fixed-focus camera, the device including: a camera support for accommodating at least one camera to be tested in at least one camera position, a collimator device for emitting collimator light of a test pattern having different object distances, a mirror system for deflecting the collimator light to the camera position, the mirror system having at least one first mirror device which is pivotable by a mirror adjustment device into multiple pivot positions, and a second mirror device having multiple second mirror units, the second mirror units reflecting the light emitted by the first mirror device in its different pivot positions to the camera position for imaging the test pattern in different image regions of an image sensor.
    Type: Application
    Filed: December 18, 2012
    Publication date: May 21, 2015
    Applicant: Robert Bosch GmbH
    Inventors: Uwe Apel, Carina Raizner
  • Publication number: 20150070511
    Abstract: Embodiments of a system for characterization of an imaging sensor using a moving modulated target with unmodulated position references is generally described herein. A target pattern comprises through-holes in a slide and resolved patches on the slide. The slide and patch have different emission intensities in the sensor’ detection band. A modulation is applied to only the emission intensities of the through-holes. The target pattern is moved across the field-of view (FOV) of the imaging sensor to present the target pattern across different frames at different positions. Frames of images of the moving target pattern as seen in the FOV of the imaging sensor are captured to generate modulated image data outputs. The unmodulated position references provided by the resolved patches are measured and used to align the modulated image data outputs, which are processed to generate data products representative of a response of the imaging sensor.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 12, 2015
    Inventor: Darin S. Williams
  • Patent number: 8976252
    Abstract: The present disclosure related to acquisition of color calibration charts. In at least some examples herein, an image of a calibration color chart is processed. A lighting condition of the color calibration chart may be automatically determined.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: March 10, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kok-Wei Koh, Nathan Moroney, Ehud Chatow, Melanie M. Gottwals
  • Patent number: 8976250
    Abstract: A lens testing system may have a test pattern source that generates a test pattern of light. A lens may have a lens surface that reflects the test pattern of light. A digital camera system may capture an image of the reflected test pattern of light. Computing equipment may perform image processing operations to evaluate the captured image of the reflected test pattern. The test pattern may contain a known pattern of test elements such as a rectangular array of spots or test elements of other configurations. During image processing operations, the computing equipment may analyze the reflected version of the spots or other test elements to measure characteristics of the lens such as radius of curvature, whether the lens contains flat regions, pits, or bumps, lens placement in a support structure, and other lens performance data. The computing equipment may compare the measured lens data to predetermined criteria.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: March 10, 2015
    Assignee: Apple Inc.
    Inventors: Joel S. Armstrong-Muntner, James J. Dudley, Richard Ruh, Anant Rai
  • Patent number: 8928758
    Abstract: Methods and systems for use in calibrating imaging data, are provided that include using a calibration array to generate a test pattern. The calibration array can emit a test pattern having geometric, temporal, and electromagnetic characteristics. The collected data can be compared with the geometric, temporal and electromagnetic characteristics to determine an error factor that can then be used in analyzing the collected data.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: January 6, 2015
    Assignee: Electronic Warfare Associates, Inc.
    Inventors: Carl N. Guerreri, Lester Anderson Foster, III
  • Patent number: 8913135
    Abstract: The present disclosure discloses a method and an apparatus for measuring response curve of an image sensor. The method comprises: taking at least one photograph of a Grey Scale card with an image sensor to be measured, wherein the photograph comprises a plurality of greyscale image blocks; calculating relative exposure values for each greyscale image block respectively corresponding to the greyscale blocks of the Grey Scale card; plotting a plurality of reference points based on pixel values of pixel points within each greyscale image block and the relative exposure values, and executing an interpolation calculation based on the reference points to obtain a response curve of the image sensor.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: December 16, 2014
    Assignee: Spreadtrum Communications (Shanghai) Co., Ltd.
    Inventors: Xiaofeng Peng, Yuan Chen, Sen Wang, Fuhuei Lin, Yuchun Huang
  • Patent number: 8896706
    Abstract: A method for providing a mapping from apparent color to actual color for an image capture device including capturing an image of a reference color chart having a plurality of color patches using the image capture device, wherein each color patch has an associated reference color, measuring the apparent color of the plurality of color patches in the captured image, selecting a plurality of control points representing different hue values within a circular hue space, determining an angular offset for each control point such that the distance between a transformed apparent color and the reference color for each color patch is minimized, the angular offset representing a hue correction, wherein interpolation of the angular offsets for the control points provides a mapping from apparent color to actual color for the image capture device.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: November 25, 2014
    Assignee: LBT Innovations, Limited
    Inventors: Anton John van den Hengel, Rhys Ernst Hill
  • Patent number: 8890959
    Abstract: There is provided a method for configuring a set of image capturing settings of a camera for a first scene condition type currently viewed by the camera. The method comprises detecting the first scene condition type; instructing the camera to acquire a plurality of test images, each test image corresponding to a set of image capturing settings; receiving input relating to a selected test image, and storing the set of image capturing settings corresponding to the selected test image as the configured set of image capturing settings for the first scene condition type to be used by the camera upon future detections of the first scene condition type.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: November 18, 2014
    Assignee: Axis AB
    Inventor: Stefan Carlsson
  • Patent number: 8878942
    Abstract: A calibration device applied to an image capture system includes a support unit and a plurality of display pattern generation units. The plurality of display pattern generation units are pivoted to the support unit. Each display pattern generation unit of the plurality of display pattern generation units includes a plurality of marks, the plurality of marks are used for generating a display pattern corresponding to the display pattern generation unit, the plurality of marks are not overlapped each other in the display pattern, and a plurality of display patterns of the plurality of display pattern generation units are also not overlapped each other. The plurality of display patterns are used for forming a calibration pattern applied to geometric calibration of the image capture system.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: November 4, 2014
    Assignee: Etron Technology, Inc.
    Inventor: Chi-Feng Lee
  • Patent number: 8878944
    Abstract: There is provided an image processing apparatus including multiple imaging units included in a stereo camera, the multiple imaging units configured to photograph a chart pattern including a pole, and a correction parameter calculation unit configured to calculate a correction parameter that corrects a gap between the multiple imaging units, based on the pole and a pattern included in the chart pattern photographed by the multiple imaging units.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: November 4, 2014
    Assignee: Sony Corporation
    Inventors: Nodoka Tokunaga, Hideki Oyaizu, Yoshihiro Myokan, Hidehiko Ogasawara
  • Patent number: 8878943
    Abstract: A theoretical motion blur amount is calculated. A static state image is acquired. For each of the plurality of shutter speed values, a bokeh amount at the boundary between different color areas in each of a plurality of the static state images that have been acquired is measured as a bokeh offset amount. A vibrated state image while the camera is being vibrated with its image stabilization function being ON is acquired. A bokeh amount at the boundary between different color areas in each of the plurality of vibrated state images that have been acquired is measured as a measured comprehensive bokeh amount. And an evaluation value indicating the performance of the image stabilization function of the camera is calculated based on the theoretical motion blur amount, the bokeh offset amount, and the measured comprehensive bokeh amount.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: November 4, 2014
    Assignee: Panasonic Corporation
    Inventors: Hiroya Kusaka, Masamichi Ohara
  • Patent number: 8872923
    Abstract: The present disclosure relates to color calibration chart acquisition. In an example, a video acquired by an imaging device may be processed. The video may be analyzed to automatically detect a reproduction of a color calibration chart. Upon detection of a reproduction of the color calibration chart, it may be determined whether color calibration chart reproduction quality is within a selected quality threshold. Upon determining that color calibration chart reproduction quality is not within a selected threshold, user feedback may be provided, via the imaging device, to dynamically guide the user to make adjustments in the video acquisition in order to obtain a color calibration chart reproduction within the selected quality threshold.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: October 28, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Melanie M. Gottwals, Ehud Chatow, Nathan Moroney
  • Patent number: 8872920
    Abstract: A captured image including a preferential calibration index arranged in an exclusive region in a first plane and a non-preferential calibration index arranged in a common region is obtained. First, the coordinate position of the preferential calibration index is detected, and then the coordinate position of the non-preferential calibration index is calculated based on the positional relationship with the detected preferential calibration index. A homography between a captured-image surface of the image surface and the first plane is calculated based on the actual coordinate positions and the calculated coordinate positions representing the coordinates of at least four points, and camera calibration is performed using the homography.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: October 28, 2014
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Toshiaki Kakinami
  • Publication number: 20140313350
    Abstract: Imaging devices may include processing circuitry, a lens, and an array of image sensor pixels and reference pixels. The array may receive direct image light and stray light from the lens. The image sensor pixels may include clear color filter elements and the reference pixels may include opaque color filter elements. The opaque color filter elements may block direct image light from being captured by the reference pixels. The image sensor pixels may generate pixel values in response to the direct image light and the stray light whereas the reference pixels may generate reference pixel values in response to the stray light. The processing circuitry may mitigate stray light effects such as local flare and veiling glare within the imaging system by adjusting the pixel values based on the reference pixel values. The imaging system may be calibrated in a calibration system for generating stray light calibration data.
    Type: Application
    Filed: August 20, 2013
    Publication date: October 23, 2014
    Applicant: Aptina Imaging Corporation
    Inventor: Brian Keelan
  • Patent number: 8866913
    Abstract: Systems and methods for calibrating a 360 degree camera system include imaging reference strips, analyzing the imaged data to correct for pitch, roll, and yaw of cameras of the 360 degree camera system, and analyzing the image data to correct for zoom and shifting of the cameras. Each of the reference strips may include a bullseye component and a dots component to aid in the analyzing and correcting.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: October 21, 2014
    Assignee: OmniVision Technologies, Inc.
    Inventors: Jeff Hsieh, Hasan Gadjali, Tawei Ho
  • Patent number: 8866912
    Abstract: Systems and methods for calibrating an array camera are disclosed. Systems and methods for calibrating an array camera in accordance with embodiments of this invention include the capturing of an image of a test pattern with the array camera such that each imaging component in the array camera captures an image of the test pattern. The image of the test pattern captured by a reference imaging component is then used to derive calibration information for the reference component. A corrected image of the test pattern for the reference component is then generated from the calibration information and the image of the test pattern captured by the reference imaging component. The corrected image is then used with the images captured by each of the associate imaging components associated with the reference component to generate calibration information for the associate imaging components.
    Type: Grant
    Filed: March 10, 2013
    Date of Patent: October 21, 2014
    Assignee: Pelican Imaging Corporation
    Inventor: Robert Mullis
  • Patent number: 8860819
    Abstract: Embodiments of the invention relate to digital imaging, and in particular, systems methods, and devices for testing target field illumination characteristics. Certain embodiments include a main unit that includes a controller configured to control timing indicators on a front surface of the main unit and light sensor modules attached to the periphery the front surface. The main unit can be configured to accept an image quality test chart. The light sensors can be configured to be coupled to the periphery of the image quality test chart or coupled to extended wired or wireless connections to provide flexible field of view placement. The display includes LED or LCD timing indicators.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: October 14, 2014
    Assignee: Peripheral Vision, Inc.
    Inventor: Michael Okincha
  • Publication number: 20140247367
    Abstract: A theoretical motion blur amount is calculated. A static state image is acquired. For each of the plurality of shutter speed values, a bokeh amount at the boundary between different color areas in each of a plurality of the static state images that have been acquired is measured as a bokeh offset amount. A vibrated state image while the camera is being vibrated with its image stabilization function being ON is acquired. A bokeh amount at the boundary between different color areas in each of the plurality of vibrated state images that have been acquired is measured as a measured comprehensive bokeh amount. And an evaluation value indicating the performance of the image stabilization function of the camera is calculated based on the theoretical motion blur amount, the bokeh offset amount, and the measured comprehensive bokeh amount.
    Type: Application
    Filed: May 15, 2014
    Publication date: September 4, 2014
    Applicant: Panasonic Corporation
    Inventors: Hiroya KUSAKA, Masamichi OHARA
  • Publication number: 20140232879
    Abstract: The present disclosure relates to color calibration chart acquisition. In an example, a video acquired by an imaging device may be processed. The video may be analyzed to automatically detect a reproduction of a color calibration chart. Upon detection of a reproduction of the color calibration chart, it may be determined whether color calibration chart reproduction quality is within a selected quality threshold. Upon determining that color calibration chart reproduction quality is not within a selected threshold, user feedback may be provided, via the imaging device, to dynamically guide the user to make adjustments in the video acquisition in order to obtain a color calibration chart reproduction within the selected quality threshold.
    Type: Application
    Filed: February 20, 2013
    Publication date: August 21, 2014
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, LLP
    Inventor: HEWLETT-PACKARD DEVELOPMENT COMPANY, LLP
  • Patent number: 8810694
    Abstract: A memory unit stores as conversion information which is derived based on a correction coefficient which provides, in a predetermined allowable range from a minimum value, a sum of a norm of a difference between a color difference of a correction target color and a target color which is a target of correction of the correction target color and a correction color obtained by correcting the correction target color using the correction coefficient, and a norm of the correction coefficient to which a predetermined weight coefficient is applied. A color correcting unit converts a color of each pixel of an image captured by an image capturing unit based on the conversion information.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: August 19, 2014
    Assignee: Fujitsu Limited
    Inventors: Yukio Hirai, Masayoshi Shimizu, Hiroyasu Yoshikawa, Nobuyuki Kanto, Takuya Kamimura
  • Publication number: 20140218543
    Abstract: Methods, systems and software are disclosed for automated Measurement of Video Quality parameters. The system includes a static Test Pattern provided either in form of a Test Pattern File, converted via a standard playout device (test source) into analog or digital test signal and supplied to the input of a System Under Test, or in form of a Reflectance Chart installed before the front-end device of the System Under Test, such as TV camera. The system also includes a video capture device connected to the back-end device of the System Under Test, e.g. to the output of system decoder/player. A Video Quality Analyzer processes the captured video data and generates a detailed Analysis Report.
    Type: Application
    Filed: February 1, 2013
    Publication date: August 7, 2014
    Inventors: Victor Steinberg, Michael Shinsky
  • Publication number: 20140211022
    Abstract: The present disclosure related to acquisition of color calibration charts. In at least some examples herein, an image of a calibration color chart is processed. A lighting condition of the color calibration chart may be automatically determined.
    Type: Application
    Filed: January 30, 2013
    Publication date: July 31, 2014
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
  • Patent number: 8792013
    Abstract: Embodiments are directed towards determining within a digital camera whether a pixel belongs to a foreground or background segment within a given image by evaluating a ratio of derivative and deviation metrics in an area around each pixel in the image, or ratios of derivative metrics across a plurality of images. For each pixel within the image, a block of pixels are examined to determine an aggregate relative derivative (ARD) in the block. The ARD is compared to a threshold value to determine whether the pixel is to be assigned in the foreground segment or the background segment. In one embodiment, a single image is used to determine the ARD and the pixel segmentation for that image. Multiple images may also be used to obtain ratios of a numerator of the ARD, useable to determine an extent of the foreground.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: July 29, 2014
    Assignee: Qualcomm Technologies, Inc.
    Inventor: Noam Levy
  • Publication number: 20140198221
    Abstract: A three-dimensional coordinate position of a calibration device is determined. Further, a code is emitted to an image capture device. The code indicates the three-dimensional coordinate position of the calibration device. In addition, an image of light emitted from the calibration device is captured. The light includes the code. An image capture device three-dimensional coordinate position of the calibration device is calibrated according to the real world three-dimensional coordinate position of the calibration device indicated by the code.
    Type: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Inventors: Paul Beardsley, Anselm Grundhoefer, Daniel Reetz
  • Patent number: 8780210
    Abstract: Methods, systems and software are disclosed for automated Measurement of Video Quality parameters. The system includes a static Test Pattern provided either in form of a Test Pattern File, converted via a standard playout device (test source) into analog or digital test signal and supplied to the input of a System Under Test, or in form of a Reflectance Chart installed before the front-end device of the System Under Test, such as TV camera. The system also includes a video capture device connected to the back-end device of the System Under Test, e.g. to the output of system decoder/player. A Video Quality Analyzer processes the captured video data and generates a detailed Analysis Report.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: July 15, 2014
    Assignee: VideoQ, Inc.
    Inventors: Victor Avigdor Steinberg, Michael Shinsky