Using Test Chart Patents (Class 348/188)
  • Publication number: 20140192208
    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: Application
    Filed: January 8, 2014
    Publication date: July 10, 2014
    Applicant: Peripheral Vision, Inc.
    Inventor: Michael Okincha
  • Patent number: 8773540
    Abstract: A method for calibrating a camera and a display monitor is provided. The method includes identifying a parameter for optimization, assigning to a test color a target color relevant to the parameter, repeatedly performing, two or more times, a set of steps, determining a direction and timing of color divergence for the target color from obtained images, and adjusting the parameter based on the direction and rate of color divergence for the target color. The set of steps includes instructing the display monitor to display the test color on a portion of the display monitor, obtaining an image captured by the camera while the display is executing the instruction, and reassigning, to the test color, a color obtained from a portion of the image in which the portion of the display monitor was captured. The obtained image includes the portion of the display monitor.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: July 8, 2014
    Assignee: Caterpillar Inc.
    Inventor: Paul Russell Friend
  • Publication number: 20140184815
    Abstract: A calibration plate and a method for calibrating image capturing devices are provided. The calibration plate includes: a plate having a front face and a rear face; a plurality of calibration patterns formed at the front face of the plate, arranged in a regular manner, and used to calibrate image distortions, lens aberrations, and image center positions for the image capturing devices; and a plurality of graphically encoded patterns formed at the front face of the plate, the graphically encoded patterns being different from each other, and the graphically encoded patterns having information providing the positions of the calibration patterns.
    Type: Application
    Filed: December 3, 2013
    Publication date: July 3, 2014
    Applicant: METAL INDUSTRIES RESEARCH&DEVELOPMENT CENTRE
    Inventors: SHI-WEI LIN, CHIH-CHIN WEN, KUO-KAI HUNG, CHIA-CHU HUANG, HAO-JHEN CHANG
  • Patent number: 8760521
    Abstract: The present disclosure relates to a sensor network including a plurality of nodes, each node having a directional sensor, a communication module, and a processor configured to receive local measurements of a calibration object from the directional sensor, receive additional measurements of the calibration object from neighboring nodes via the communication module, estimate an initial set of calibration parameters in response to the local and additional measurements, receive additional sets of calibration parameters from neighboring nodes via the communication module, and recursively estimate an updated set of calibration parameters in response to the additional sets of calibration parameters. Additional systems and methods for calibrating a large network of camera nodes are disclosed.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: June 24, 2014
    Assignees: Purdue Research Foundation, Olympus Corporation
    Inventors: Henry Ponti Medeiros, Johnny Park, Avinash Kak, Hidekazu Iwaki
  • Publication number: 20140168367
    Abstract: A plurality of homography operators define respective mappings between pairs of coordinate spaces, wherein the coordinate spaces include a coordinate space of a first visual sensor, a virtual coordinate space, and a coordinate space of a second visual sensor. Calibration between the first and second visual sensors is provided using the plurality of homography operators.
    Type: Application
    Filed: December 13, 2012
    Publication date: June 19, 2014
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: Jinman Kang
  • Patent number: 8749640
    Abstract: Blur-calibration of an imaging sensor includes moving a known target pattern across the field-of view (FOV) of the imaging sensor to present the target pattern across different frames at different pixel phases. The known target pattern comprises a plurality of point-like objects with fixed relative positions in which at least one point-like object has a different focus position. Frames of images of the moving target pattern as seen in the FOV of the imaging sensor are captured to sample point-like objects at different focus positions and generate a multi-focal image data output, which may be subsequently processed to generate data products at different focus positions from a high-resolution composite image generated from the captured frames.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: June 10, 2014
    Assignee: Raytheon Company
    Inventor: Darin S. Williams
  • Publication number: 20140152845
    Abstract: A testing device for a camera, in particular of driver assistance systems in a motor vehicle, including a mount for a camera and at least two light sources for emitting test light toward the camera, the mount and at least one of the at least two light sources being situated fixed in relation to one another with respect to their relative location and position, and a control device which is configured to activate the at least two light sources in such a way that in chronological sequence one light source is switched on and the at least one other light source is switched off. Also described is a related testing method for a camera and a testing system.
    Type: Application
    Filed: March 20, 2012
    Publication date: June 5, 2014
    Inventors: Ulrich Seger, Uwe Apel, Carina Raizner
  • Patent number: 8743214
    Abstract: A system for determining one or more camera calibration parameters is disclosed. The system comprises a processor and a memory. The processor is configured to: a) provide a first pattern for display on a display screen; b) receive a first image from a camera viewing the display screen; c) provide a second pattern for display on the display screen; and d) receive a second image from the camera viewing the display screen. The relative position of the display screen and the camera are the same as when the first image was captured using the camera. The processor is further configured to determine an image location which is a projection of a known physical location on the display screen by using at least in part a first feature identified in the first image and a second feature identified in the second image and determine one or more calibration parameters based at least in part on the determined image location. The memory is coupled to the processor and configured to provide the processor with instructions.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: June 3, 2014
    Assignee: Intel Corporation
    Inventors: Etienne Grossmann, John Iselin Woodfill, Gaile Gibson Gordon
  • Patent number: 8736686
    Abstract: An optical analysis method is provided for judging whether a lens and a sensing element of an image pickup device are parallel with each other. The method utilizes a tested image pickup device and a standard image pickup device to shoot an object at the same fixed shooting position to acquire a standard image frame and a tested image frame. According to the difference between the position coordinate value or the area of at least one mark of the standard image frame and the tested image frame, the method can judge whether the tested lens and the tested sensing element of the tested image pickup device are parallel with each other.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: May 27, 2014
    Assignee: Primax Electronics Ltd.
    Inventors: Szu-Hao Lyu, Chien-Nan Yu
  • Patent number: 8736683
    Abstract: The invention relates to a method for estimating a defect in an image-capturing system (I), which produces, with regard to any first image (I), representing any scene (S), a variation in the field of a characteristic of the first image, having an order of magnitude that is statistically lower than a variation in the field of said characteristic added by the scene. The method comprises: calculating, in at least a first portion of the field of the first image, a measurement (?(I)) related to said characteristic of the first image, an estimative magnitude (?) of said defect, depending on the calculated measurement and having a variation having the same order of magnitude as the variation in the field of said characteristic of the first image produced by said defect.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: May 27, 2014
    Assignee: DxO Labs
    Inventors: Frederic Cao, Frederic Guichard, Ayham Nseir
  • Publication number: 20140125819
    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: Application
    Filed: October 2, 2013
    Publication date: May 8, 2014
    Applicants: SONY COMPUTER ENTERTAINMENT INC., SONY CORPORATION
    Inventors: Nodoka TOKUNAGA, Hideki OYAIZU, Yoshihiro MYOKAN, Hidehiko OGASAWARA
  • Patent number: 8711225
    Abstract: An image-capturing device and a projection automatic calibration method of a projection device are provided. The image-capturing device includes an image sensing device, a lens, a processing unit and a storage unit. The lens is configured to image a calibration pattern on the image sensing device. The processing unit is configured to issue a projection calibration requirement and analyze the calibration pattern imaged on the image sensing device to obtain information relating to the calibration pattern, and the processing unit is further configured to convert imaging coordinates of the calibration pattern imaged on the image sensing device into projecting coordinates of the projection device by executing a calibration driving program to establish a coordinate conversion table. The storage unit is configured to store the calibration driving program and the coordinate conversion table.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: April 29, 2014
    Assignee: Coretronic Corporation
    Inventors: Kun-Rong Chang, Wen-Wei Tsai
  • Publication number: 20140111656
    Abstract: This invention provides a system and method for auto-regulation of parameters a vision system camera and/or associated illumination of objects imaged by the camera using a plurality of differentiated gain (multi-gain) settings on the camera's image sensor to determine the gain value producing the most-readable image. The image (having the best characteristics) acquired using multiple gain settings can be read for information as a discrete gain image and/or the camera parameters (e.g. global gain and/or global exposure time) can be uniformly set across the pixel array to the best values for acquisition of a subsequent, higher sampled image. This image is then read (e.g. decoded) for information contained within any identified features of interest (e.g. found IDs).
    Type: Application
    Filed: March 11, 2013
    Publication date: April 24, 2014
    Applicant: COGNEX CORPORATION
    Inventor: COGNEX CORPORATION
  • Patent number: 8705151
    Abstract: Imaging device calibration methods, imaging device calibration instruments, imaging devices, and articles of manufacture are described. According to one embodiment, an imaging device calibration method includes emitting light for use in calibration of an imaging device, providing an emission characteristic of the light, sensing the light using an image sensor of the imaging device, generating sensor data indicative of the sensing using the image sensor, and determining at least one optical characteristic of the imaging device using the generated sensor data and the emission characteristic for use in calibration of the imaging device, and wherein the at least one optical characteristic corresponds to the image device used to sense the light.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: April 22, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Jeffrey M. DiCarlo
  • Patent number: 8687068
    Abstract: A pattern includes a spatial configuration of color codes. Each color code is a unique configuration of colors selected from a number of basis colors. The color codes each include the same number of colors.
    Type: Grant
    Filed: September 19, 2010
    Date of Patent: April 1, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Nelson Liang An Chang, Suk Hwan Lim
  • Patent number: 8681224
    Abstract: The present application relates to a high precision method for calibrating and removing distortion from a lens, and more particularly, a method for calibrating and removing distortion by arranging sensor readings to compensate for its presence and simultaneously optimize the resulting image magnification for best image quality.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: March 25, 2014
    Assignee: Dublin City University
    Inventors: John Mallon, Paul F. Whelan
  • Patent number: 8665334
    Abstract: Embodiments of a system and method for blur-calibration of an imaging sensor using a moving constellation are generally described herein. In some embodiments, blur-calibration of an imaging sensor includes moving a known target pattern across the field-of view (FOV) of the imaging sensor to present the target pattern across different frames at different pixel phases. Frames of images of the moving target pattern as seen in the FOV of the imaging sensor are captured to generate image data output. The image data output may be subsequently processed to generate data products representative of a shape of a point-spread function (PSF) from a high-resolution composite image generated from the captured frames. A chopper modulation may be applied to the moving target sequence and separate chopper-open and chopper-closed composite images are created. The PSF may be determined based on the difference between the chopper-open and chopper-closed composite images.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: March 4, 2014
    Assignee: Raytheon Company
    Inventor: Darin Williams
  • Publication number: 20140036096
    Abstract: A method is provided for positioning an image sensor having a light receiving plane within a camera and a system is provided for identifying the position of an image sensor. The method comprises projecting a first group of substantially parallel light beams representing a first predetermined pattern onto the light receiving plane of the image sensor at an angle of incidence, projecting a second group of substantially parallel light beams representing a second predetermined pattern onto the light receiving plane of the image sensor at an angle of incidence, registering positions on the light receiving plane of the image sensor where the light beams are detected by the image sensor, generating adjustment information based on the registered positions, indicating if the present position of the image sensor is an erroneous position or not, and adjusting the position of the image sensor based on the adjustment information.
    Type: Application
    Filed: August 1, 2013
    Publication date: February 6, 2014
    Applicant: AXIS AB
    Inventor: Fredrik STERNGREN
  • Patent number: 8619153
    Abstract: A method of calibrating a brightness value measured by a camera with an amount of light received by the camera includes creating a series of measurements, wherein for each measurement the amount of light received at an image plane in the camera is controlled to be a known ratio of two opposed irradiance values: a high irradiance value and a low irradiance value. Each ratio is correlated with the brightness value measured by the camera. A function is obtained describing the correlation.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: December 31, 2013
    Assignee: Microsoft Corporation
    Inventors: Yasuyuki Matsushita, Bennett S. Wilburn
  • Publication number: 20130335579
    Abstract: A camera system (10) includes: a camera (12) that obtains a test image (200); and an image processor (30). The image processor (30): analyzes said test image (200) to detect an object (22) appearing in the test image (200); determines a location where the detected object (22) appears in the test image (200); compares the determined location with a reference location; and determines if the camera (12) is one of properly aligned or misaligned based upon a result of said comparison.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 19, 2013
    Applicant: Palo Alto Research Center Incorporated
    Inventors: Ajay Raghavan, Juan Liu, Robert R. Price
  • Publication number: 20130335580
    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: Application
    Filed: May 6, 2013
    Publication date: December 19, 2013
    Applicant: ELECTRONIC WARFARE ASSOCIATES, INC.
    Inventors: Carl N. GUERRERI, Lester ANDERSON FOSTER, III
  • Patent number: 8610777
    Abstract: A color calibration card (1) for digital photography with a maximum of 40 calibration fields, each exhibiting a color in a color space according to CIE 1976 (L*, a*, b*) D50 2°, wherein a first group with at least 3 calibration fields (4G1, 4G2, 4G3) exhibits green colors having an a value within the range of ?30 to ?60 and a b value within the range of +10 to +30, a second group (4B1, 4B2, 4B3) exhibits blue colors having an a value within the range of ?20 to ?20 and a b value within the range of ?30 till ?60, a third group (4R1, 4R2, 4R3) exhibits red colors having an a value within the range of +40 to +60 and a b value within the range of ?5 to +30, and wherein the respective calibration fields in each group (4G1, 4G2, 4G3; 4B1, 4B2, 4B3; 4R1, 4R2, 4R3) exhibit colors for which the values in at least one of a or b differ by at least 5 units from the corresponding values for the other calibration fields in the group.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: December 17, 2013
    Assignee: QPCARD AB
    Inventor: Joakim Bengtsson
  • Patent number: 8606030
    Abstract: An image correction device includes a test chart, an image capturing module, an image separating module, a processing module, a first calculating module, a second calculating module, and a correction module. The image capturing module includes an image sensor for capturing an image of the test chart. The image includes two second circular black spots. The image separating module separates the image, thus obtaining a channel image. The processing module is for binarizing the channel image, thus obtaining a binary image of the channel image. The first calculating module calculates coordinates of the centers of the two second spots of the binary image. The second calculating module calculates a rotated angle of the image. The correction module inputs the rotated angle into the image sensor so that the image sensor corrects the image.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: December 10, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Wen-Min Ning
  • Patent number: 8587849
    Abstract: Imaging systems, imaging device analysis systems, imaging device analysis methods, and light beam emission methods are described. According to one aspect, an imaging device analysis method includes receiving initial light comprising a plurality of wavelengths of light, filtering some of the wavelengths of the initial light forming a plurality of light beams comprising different wavelengths of light, after the filtering, optically communicating the light beams of the different wavelengths of light to an imaging device, receiving the light beams using the imaging device, and analyzing the imaging device using light, wherein the light beams comprising the different wavelengths of light are emitted beams after the receiving.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: November 19, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Anurag Gupta, Michael Long, Jeffrey M. DiCarlo
  • Patent number: 8581986
    Abstract: In one embodiment, the present invention is a method and apparatus for measuring the focus performance of a camera and lens combination. One embodiment of a test target for measuring a focus performance of a camera and lens combination includes a target body, the target body displaying a pattern including: a primary pattern covering a portion of the target body and a secondary pattern superimposed over a portion of the primary pattern, the secondary pattern being aligned along an edge of the target body. The test target also includes a ruler positioned adjacent to the edge of the target body, a ruler positioned adjacent to the edge of the target body, such that the secondary pattern directly abuts a zero line of the ruler.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: November 12, 2013
    Assignee: Datacolor Holding AG
    Inventors: Gianluca Colla, Andrea Benedetti
  • Patent number: 8564671
    Abstract: Provided is a television camera using a solid-state imaging device, wherein color signal adjustment between TV cameras can be performed easily and quickly without relying on the level of skill of an operator. The serial digital signal of a TV camera (a master) acting as the standard for color signal adjustment is directly input into another TV camera (a slave) that adjusts the color signal, and the image level of each channel of the slave is automatically adjusted in a manner such that the image level of each channel of the master corresponds with that of the slave.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: October 22, 2013
    Assignee: Hitachi Kokusai Electric Inc.
    Inventor: Muneaki Odawara
  • Publication number: 20130258116
    Abstract: An image-capturing device and a projection automatic calibration method of a projection device are provided. The image-capturing device includes an image sensing device, a lens, a processing unit and a storage unit. The lens is configured to image a calibration pattern on the image sensing device. The processing unit is configured to issue a projection calibration requirement and analyze the calibration pattern imaged on the image sensing device to obtain information relating to the calibration pattern, and the processing unit is further configured to convert imaging coordinates of the calibration pattern imaged on the image sensing device into projecting coordinates of the projection device by executing a calibration driving program to establish a coordinate conversion table. The storage unit is configured to store the calibration driving program and the coordinate conversion table.
    Type: Application
    Filed: January 8, 2013
    Publication date: October 3, 2013
    Applicant: Coretronic Corporation
    Inventors: Kun-Rong Chang, Wen-Wei Tsai
  • Patent number: 8547450
    Abstract: A method for calibrating automatic white balance (AWB) in a digital system is provided that includes capturing an image of a test target under a natural lighting condition, generating a first color temperature reference from the captured image, and outputting AWB configuration data for the digital system, wherein the AWB configuration data comprises the first color temperature reference and a second color temperature reference generated using the test target under simulated lighting conditions. A method for calibrating automatic white balance (AWB) in a digital system comprising a first imaging sensor is provided that includes receiving a reference for AWB that was generated using an image captured using a second imaging sensor, and compensating a histogram reference into a histogram reference for AWB for the first imaging sensor in the digital system based on R, G, B adjustment values from the second imaging sensor to the first imaging sensor.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: October 1, 2013
    Assignee: Texas Instruments Incorporated
    Inventor: Buyue Zhang
  • Patent number: 8547439
    Abstract: A camera module under test is signaled to capture an image of a target. A group of pixels of the image that represent portions of several objects in the target are low pass filtered and then analyzed to compute a pixel distance between different subgroups of pixels that represent portions of the different objects. The computed pixel distance is then converted into a true distance using a predetermined math relationship that relates a pixel distance variable with a true distance variable.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: October 1, 2013
    Assignee: Apple Inc.
    Inventor: Jason R. Rukes
  • Publication number: 20130242118
    Abstract: Among other things, on a two-dimensional electronic display are shown simultaneously: (a) at least a partial body view of a surface of the human model on which a location of a skin lesion on a corresponding real human has been indicated, and (b) an image of the lesion area that corresponds to the partial body view of the human model.
    Type: Application
    Filed: April 23, 2013
    Publication date: September 19, 2013
    Applicant: MELA SCIENCES, INC.
    Inventors: Christiano Butler, Joanna S. Adrian, Maciej Wojton, Mrinalini Roy
  • Patent number: 8531530
    Abstract: An adjusting method for a lens unit used in an image reading apparatus which images image information of an original onto an image reading unit by the lens unit and reads the image information, the lens unit including rotationally-symmetrical lenses, a lens barrel including the rotationally-symmetrical lenses and an adjusting lens, the adjusting method including: performing rotational adjustment of the lens barrel with respect to the adjusting lens; and imaging an adjusted chart onto one-dimensional photoelectric transducers via the lens unit, obtaining contrast depth characteristics of images corresponding to at least three angles of field of the lens unit among images of the adjusted chart, and, according to the obtained contrast depth characteristics, performing position adjustment of the adjusting lens in at least one of an array direction of the one-dimensional photoelectric transducers, a direction orthogonal to the array direction and an optical axis direction of the lens unit.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: September 10, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadao Hayashide, Takeyoshi Saiga
  • Patent number: 8531529
    Abstract: A dead pixel compensating apparatus includes, inter alia, a pattern generation unit generating a programmable test pattern including data with respect to at least one dead pixel; a register array storing the test pattern; a dead pixel compensation unit receiving the test pattern stored in the register array and performing a dead pixel compensation algorithm to output compensation data; and a determination unit comparing the test pattern and the compensation data to determine whether or not the dead pixel compensation algorithm has an error, wherein a dead pixel compensation algorithm for compensating for a dead pixel of an image sensor in image data supplied from the image sensor is tested.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: September 10, 2013
    Assignee: SK Hynix Inc.
    Inventors: Geon Pyo Kim, Jong Park Kim, Myoung Kwan Kim
  • Publication number: 20130222607
    Abstract: An object of the present invention is to simplify a calibration operation of a camera and to shorten a time necessary for calibration. A camera calibration device 10 is mounted on a predetermined position of a movable object 100 and includes a camera 11 configured to take an image including an index 41 provided outside the movable object 100, an image superimposing unit 122 configured to generate a superimposed image by superimposing a calibration object 42 having a position adjustment part and a rotation adjustment part on the image taken by the camera 11, and a calculation unit 124 configured to calculate, based on a position of the calibration object 42 after being shifted in the superimposed image such that an end or a center of the index 41 meets the position adjustment part and a part of the index other than the end or the center overlaps the rotation adjustment part, parameters relative to a pan angle, a tilt angle and a roll angle for calibration of the camera mounting position.
    Type: Application
    Filed: July 6, 2012
    Publication date: August 29, 2013
    Applicant: KYOCERA CORPORATION
    Inventors: Takeo OSHIMA, Takashi MAEKAWA, Ryuuichi SAWADA, Haruo YANAGISAWA, Chinatsu SAKURAI, Akinori IWABUCHI, Shinya TAMIZU, Takashi INOUE
  • Patent number: 8508657
    Abstract: In a test method in which an image photographed by a camera apparatus 1 attached to a body of a vehicle is displayed on a display device 17 and an examiner examines compliance or non-compliance of the shooting direction of the camera apparatus 1 by comparing the position of a reference pattern and the position of a judgment pattern on the displayed photographed image, the photographed image is obtained at first by photographing with the camera apparatus 1 a test chart which is placed at a predefined position ahead of the vehicle with the reference pattern drawn on the test chart. Next, the judgment pattern is set at a specific position on the photographed image. Then, the photographed image on which the judgment pattern has been set is displayed on the display device 17.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: August 13, 2013
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Yoshiyuki Sogawa, Keiichi Murakami, Yoshio Tozawa
  • Patent number: 8508584
    Abstract: According to the apparatus, the method, the program, and the recording medium of the present invention, the amount of feed of a first zoom lens and the amount of feed of a second zoom lens corresponding to a magnification of the first zoom lens and a magnification of the second zoom lens which are close to each other are associated, and the amounts of feed of the first zoom lens and the second zoom lens corresponding to an arbitrarily designated magnification are set. Accordingly, the magnifications of the first zoom lens and the second zoom lens can be accurately made almost equal over the entire zoom range. Since the magnifications of the first zoom lens and the second zoom lens are made equal on the basis of the amounts of feed, effective pixels do not decrease, unlike magnification correction using an electronic zoom.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: August 13, 2013
    Assignee: FUJIFILM Corporation
    Inventor: Hiroyuki Iwasaki
  • Publication number: 20130188018
    Abstract: A stereoscopic measurement system determines relative location of a point on an object based on a stereo image pair of the object. The system comprises an image capture device for capturing a stereo image pair of the object, the image pair comprising a first image and a second image of the object. The system comprises a processing system configurable to designate a first point and a second point on the first image, designate the first point and the second point on the second image, define stereo points based on the designated points, and to calculate a distance between the stereo points.
    Type: Application
    Filed: July 20, 2012
    Publication date: July 25, 2013
    Applicant: MATRIX ELECTRONIC MEASURING PROPERTIES, LLC
    Inventors: George B. STEVENS, Robert W. SRACK, Janet M. SRACK, Thomas L. SRACK, Robert` D. BAILEY, Mark A. ANZALONE
  • Patent number: 8488039
    Abstract: A digital image processing apparatus capable of displaying a color distribution chart and a method of operating the same is provided. The digital image processing apparatus includes a digital signal processing unit which detects digital color signals from an image input via an image photographing unit and calculates a color distribution chart that indicates a proportion of the detected color signals in the image. The apparatus and method can calculate and display a color distribution chart of a displayed image and change colors of the image into optimized colors.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: July 16, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Eun-young Kim
  • Publication number: 20130169825
    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: Application
    Filed: November 21, 2012
    Publication date: July 4, 2013
    Applicant: SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD.
    Inventor: Spreadtrum Communications (Shanghai) Co., Ltd.
  • Publication number: 20130162840
    Abstract: A colour calibration card (1) for digital photography with a maximum of 40 calibration fields, each exhibiting a colour in a colour space according to CIE 1976 (L*, a*, b*) D50 2°, wherein a first group with at least 3 calibration fields (4G1, 4G2, 4G3) exhibits green colours having an a value within the range of ?30 to ?60 and a b value within the range of +10 to +30, a second group (4B1, 4B2, 4B3) exhibits blue colours having an a value within the range of ?20 to ?20 and a b value within the range of ?30 till ?60, a third group (4R1, 4R2, 4R3) exhibits red colours having an a value within the range of +40 to +60 and a b value within the range of ?5 to +30, and wherein the respective calibration fields in each group (4G1, 4G2, 4G3; 4B1, 4B2, 4B3; 4R1, 4R2, 4R3) exhibit colours for which the values in at least one of a or b differ by at least 5 units from the corresponding values for the other calibration fields in the group.
    Type: Application
    Filed: March 30, 2011
    Publication date: June 27, 2013
    Applicant: QPCARD AB
    Inventor: Joakim Bengtsson
  • Patent number: 8467060
    Abstract: A test apparatus comprising a self illuminated light source and second moveable element having spectrophotometrically neutral gray and color patches of predetermined hues and saturations. A digital software file provides identical spectrophotometrically neutral grayscale and color data which, when reproduced on a monitor or projection system, should match the grayscale and test colors provided by the apparatus. When the apparatus is placed in front of the monitor image or projected image, the neutral grays and color patches reproduced on the monitor image or projected image are compared against the image of the apparatus.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: June 18, 2013
    Inventor: Ferrand D. E. Corley
  • Publication number: 20130141593
    Abstract: Various embodiments are described herein for a system and method for calibrating a display device to eliminate distortions due to various components such as one or more of lenses, mirrors, projection geometry, lateral chromatic aberration and color misalignment, and color and brightness non-uniformity. Calibration for distortions that vary over time is also addressed. Sensing devices coupled to processors can be used to sense display characteristics, which are then used to compute distortion data, and generate pre-compensating maps to correct for display distortions.
    Type: Application
    Filed: January 31, 2013
    Publication date: June 6, 2013
    Applicant: GEO SEMICONDUCTOR INC.
    Inventor: GEO SEMICONDUCTOR INC.
  • Patent number: 8451334
    Abstract: A calibration pattern is provided with a central portion and a frame pattern provided outside thereof, the central portion being provided with a rectangular light area in the central portion of the calibration pattern. The frame pattern has a horizontal pattern and a vertical pattern, the horizontal pattern extending to two horizontal sides centering the central portion and alternately provided with a light area and a dark area at a predetermined interval different from an equal interval, the vertical pattern extending to two vertical sides centering the central portion and alternately provided with a light area and a dark area at a predetermined interval different from an equal interval. The horizontal pattern and the vertical pattern include edges, each being positioned equally distant from a predetermined position in the central portion to the two sides, and the edges have an identical change direction of a gray value.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: May 28, 2013
    Assignee: Mitutoyo Corporation
    Inventor: Yuko Shishido
  • Publication number: 20130107059
    Abstract: A noise detecting device includes an image acquiring unit and a parallel processing unit. The image acquiring unit acquires an image from a camera that captures the image of a test pattern including a plurality of lines tilted at a specific angle relative to a specific direction. The parallel processing unit sequentially extracts image signals for two lines extending in parallel in the specific direction of the image, the two parallel lines being away from each other by a specific number of lines, and performs in a parallel manner, for each image signals for the two parallel lines, processing for detecting noise generated in the image on the basis of a difference in pixel values calculated from the image signals for the two parallel lines.
    Type: Application
    Filed: October 23, 2012
    Publication date: May 2, 2013
    Applicant: SONY CORPORATION
    Inventor: Sony Corporation
  • Publication number: 20130083205
    Abstract: A test chart can be used to test sharpness performance of an imaging system's full image field by having a sharpness inspection area formed of a plurality of identical visual elements that abut each other leaving no gaps to thereby form a mosaic. Each visual element includes a plurality of groups of differently oriented contrasting lines. The mosaic may fill an entire image captured by an imager. Thus, a test system can image the chart to objectively assess the performance of the imaging system in terms of image quality (e.g. sharpness, tilt, etc) throughout the entire spatial area of the captured image. The size of the chart and spatial frequency spacing) of the visual element lines can be selected to test an imaging system's full field sharpness at selected spatial frequencies. The full field sharpness results more quickly and accurately determine different aspects of a given imaging system.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 4, 2013
    Inventors: Mark N. Gamadia, Fei Wu, Shizhe Shen, Jason Rukes
  • Publication number: 20130083168
    Abstract: There is provided a calibration apparatus for a camera module capable of calibrating the difference in optical characteristics between left and right images of a binocular camera module in real time by capturing images of a plurality of rotating test boards. The calibration apparatus of a camera module includes: a test unit including two or more mutually connected test boards, the test boards having images captured by a camera module and rotating at a pre-set angle; and a calibration unit receiving the images of the test boards captured by the camera module and calibrating optical characteristics thereof.
    Type: Application
    Filed: December 29, 2011
    Publication date: April 4, 2013
    Applicant: SAMSUNG ELCTRO-MECHANICS CO., LTD.
    Inventors: Joo Hyun KIM, Jagarlamudi Veera Venkata PRASAD, Nagaraj AVINASH, Soon Seok KANG
  • Patent number: 8405727
    Abstract: An apparatus and method are disclosed for calibrating image capture devices, such as the type used in electronic devices. In some embodiments, the electronic device may include at least one array of pixels and a memory coupled to the at least one array of pixels. The electronic device may further include a central processing unit (CPU) coupled to the memory and at least one color filter optically coupled to the at least one array of pixels. The memory may further include one or more storage locations that include a response of the at least one color filter to one or more predetermined wavelengths from a target test source, as well as, one or more storage locations that include a response of one or more baseline color filters.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: March 26, 2013
    Assignee: Apple Inc.
    Inventors: David S. Gere, Ting Chen, Chad Andrew Bronstein
  • Patent number: 8400505
    Abstract: A calibration device and method calibrates a distance measuring device which provides captured images with significant lens aberration. The calibration device and method estimate a camera parameter representing a characteristic of each imaging system of a distance measuring device, and perform the following: capture, using the distance measuring device, an image of a reference chart which (i) represents a geometric pattern in which elements are arranged and (ii) is positioned to have a predetermined positional relationship with the distance measuring device; modify a luminance distribution affected by aberration of the lens in the captured image of the reference chart; calculate, as a feature point position, a gravity center position of each element in the captured image whose luminance distribution is modified; and estimate the camera parameter using the feature point position calculated in the calculating and an approximate actual gravity center position in the reference chart.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: March 19, 2013
    Assignee: Panasonic Corporation
    Inventors: Ichiro Oyama, Norihiro Imamura
  • Patent number: 8395666
    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: September 4, 2011
    Date of Patent: March 12, 2013
    Assignee: Videoq, Inc.
    Inventors: Victor Steinberg, Michael Shinsky
  • Publication number: 20130057706
    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: September 4, 2011
    Publication date: March 7, 2013
    Inventors: Victor Steinberg, Michael Shinsky
  • Patent number: 8368762
    Abstract: Methods and apparatus for camera calibration based on multiview image geometry. A lens profiling module may estimate two or more mathematical models for correcting aberrations in images in a single pass from a set of calibration images captured with a camera/lens combination. For example, the module may estimate the lens aberrations of geometric distortion, lateral chromatic aberration, and vignette models in a single pass. The module may determine point correspondences, 3D transformations, and camera intrinsics for views of calibration charts captured in the images. The module estimates the mathematical models for the two or more types of aberrations from the information determined from the views of the calibration charts. The module may automatically determine an optimal model complexity when estimating the mathematical models. The estimated models may be written or appended to a lens profile for the camera/lens combination used to captured the calibration images.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: February 5, 2013
    Assignee: Adobe Systems Incorporated
    Inventors: Simon Chen, Hailin Jin, Jen-Chan Chien, Daniel R. Goldman