Using Test Chart Patents (Class 348/188)
  • Patent number: 8363111
    Abstract: A resolution test device and a method thereof are provided. The resolution test method is adapted for testing a resolution of a camera device. The resolution test method includes providing a graph to the camera device, capturing a test image shot by the camera device, shifting an analyzing window a specific distance in a first direction from a static area to a first area on the test image, analyzing the first area to generate a first high-pass element, shifting the analyzing window back to the static area, shifting the analyzing window the specific distance in a second direction from the static area to a second area on the test image, analyzing the second area to generate a second high-pass element, generating a third high-pass element according to the first and the second high-pass element, and defining the resolution of the camera device according to the third high-pass element.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: January 29, 2013
    Assignee: Altek Corporation
    Inventors: Ku-Nien Chang, Wen-Chun Chen
  • Patent number: 8350914
    Abstract: Certain embodiments of the present invention provide methods and systems for calibration of an imaging camera or other image acquisition device. Certain embodiments include characterizing a transformation from a coordinate system of an imager to a coordinate system of a first sensor positioned with respect to the imager using a first off-line calibration. Certain embodiments also include characterizing a transformation from a coordinate system of an imaging camera source to a coordinate system of a second sensor positioned with respect to the imaging camera source using a second off-line calibration. Additionally, certain embodiments include quantifying intrinsic parameters of the imaging camera source based on a transformation from the coordinate system of the imager to the coordinate system of the imaging camera source based on the first and second off-line calibrations and information from the first and second sensors and a transmitter positioned with respect to an object being imaged.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: January 8, 2013
    Assignee: General Electric Company
    Inventors: Dun Alex Li, Christopher Allen Nafis
  • Patent number: 8319857
    Abstract: A process for measuring skin color parameters from a digital photograph using novel color correction algorithms is described. The process includes measuring color values of a digital color photo, correcting the color deviation of each picture to that of a standard color, and converting the corrected RGB values and generating an output that is useful to L*a*b* values to describe changes in the color properties of the photographed skin.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: November 27, 2012
    Assignee: Access Business Group International LLC
    Inventors: Di Qu, Richard B. Bylsma, James R. Mayne
  • Publication number: 20120274788
    Abstract: A resolution test device and a method thereof are provided. The resolution test method is adapted for testing a resolution of a camera device. The resolution test method includes providing a graph to the camera device, capturing a test image shot by the camera device, shifting an analyzing window a specific distance in a first direction from a static area to a first area on the test image, analyzing the first area to generate a first high-pass element, shifting the analyzing window back to the static area, shifting the analyzing window the specific distance in a second direction from the static area to a second area on the test image, analyzing the second area to generate a second high-pass element, generating a third high-pass element according to the first and the second high-pass element, and defining the resolution of the camera device according to the third high-pass element.
    Type: Application
    Filed: August 3, 2011
    Publication date: November 1, 2012
    Applicant: ALTEK CORPORATION
    Inventors: Ku-Nien Chang, Wen-Chun Chen
  • Patent number: 8294771
    Abstract: An image correction device includes an image capturing module, a first calculating module, a second calculating module, a third calculating module, and a correction module. The image capturing module includes an image sensor having a center (Xo, Yo). The image capturing module takes an image of a test chart. A center of the group of black stripes is coincident with a center of the image. The first calculating module is for calculating coordinates of a center of each black stripe of the group of black stripes. The second calculating module is for calculating coordinates (Xc, Yc) of the center of the image. The third calculating module is for calculating a coordinate deviation (?X, ?Y)=(Xc?Xo, Yc?Yo). The correction module is for inputting the coordinate deviation (?X, ?Y) into the image sensor so that the image sensor corrects the image according to the coordinate deviation (?X, ?Y).
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: October 23, 2012
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Wen-Min Ning
  • Patent number: 8284260
    Abstract: Improving color calibration, and similar operations, by generating an optimal raw RGB color chart, in the raw RGB domain, for an imaging device with a given type of image sensor, such as for a digital still camera. Calibration is performed in response to a constraint which takes into account the spectral sensitivity of the image sensor used on the camera as well as spectral reflectance and spectral radiance of multiple illuminants. Calibration is performed using the raw RGB color chart which is illuminant independent and image sensor specific and which can match the calibration performance of known calibration standards, such as Macbeth 24.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: October 9, 2012
    Assignee: Sony Corporation
    Inventors: Xiaoling Wang, Farhan Baqai, Takami Mizukura, Naoya Kato
  • Patent number: 8259180
    Abstract: The invention is concerned with an imaging capability estimation method and apparatus for an image-formation optical system, which can match the results of direct estimation of an actually visible image to the visibility of that image and is less vulnerable to image processing. According to the method and apparatus, an image of a random pattern 1 is formed through an image-formation optical system S to be inspected. A texture attribute is calculated from the picked-up random pattern image, and the obtained texture attribute is used to make an estimation of the imaging capability of the image-formation optical system S.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: September 4, 2012
    Assignee: Olympus Corporation
    Inventor: Shuichiro Ogasawara
  • Patent number: 8248477
    Abstract: A method of calibrating, compressing and decompressing image signal values of an image sensor which has a plurality of light sensitive pixels arranged in rows and columns comprises the steps of: reading out the image signal values; compressing the image signal values; and decompressing the compressed image signal values, wherein the image signal values are calibrated while using calibration data sets which include a number of calibration values for each pixel.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: August 21, 2012
    Assignee: Arnold & Richter Cine Technik GmbH & Co. Betriebs KG
    Inventors: Michael Cieslinski, Achim Oehler
  • Publication number: 20120206612
    Abstract: In one embodiment, the present invention is a test target for color calibrating a camera and lens combination. One embodiment of a test target for use in color calibrating a camera and lens combination includes a first substantially flat plane, the first substantially flat plane including a first magnetic support surface, a second substantially flat plane, the second substantially flat plane including a second magnetic support surface, and a hinge connecting the first substantially flat plane to the second substantially flat plane.
    Type: Application
    Filed: February 11, 2011
    Publication date: August 16, 2012
    Inventors: C. DAVID TOBIE, Shawn Clark, Taeyoung Park
  • Patent number: 8208758
    Abstract: The disclosure is directed to techniques for region-of-interest (ROI) video processing based on low-complexity automatic ROI detection within video frames of video sequences. The low-complexity automatic ROI detection may be based on characteristics of video sensors within video communication devices. In other cases, the low-complexity automatic ROI detection may be based on motion information for a video frame and a different video frame of the video sequence. The disclosed techniques include a video processing technique capable of tuning and enhancing video sensor calibration, camera processing, ROI detection, and ROI video processing within a video communication device based on characteristics of a specific video sensor. The disclosed techniques also include a sensor-based ROI detection technique that uses video sensor statistics and camera processing side-information to improve ROI detection accuracy.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: June 26, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Haohong Wang, Shuxue Quan, Khaled Helmi El-Maleh, Chinchuan Andrew Chiu, Xiaoyun Jiang
  • Patent number: 8208029
    Abstract: A method for calibrating a camera including (a) obtaining a two-dimensional (2D) homography that maps each of parallelograms projected onto two images taken by the camera into a rectangle, wherein the 2D homography is defined as a rectification homography and wherein new cameras that have virtual images are defined as rectified cameras and a new infinite homography is generated between the two rectified cameras, the virtual images being transformed from original images by the rectification homography; (b) obtaining an original infinite homography by using the correlations among the new infinite homography, the rectification homography and the original infinite homography; and (c) obtaining intrinsic camera parameters based on the correlation between the original infinite homography and the intrinsic camera parameters, thereby calibrating the camera.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: June 26, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae Hean Kim, Jin Ho Kim, Byoung Tae Choi
  • Patent number: 8174585
    Abstract: A color conversion coefficient calculation apparatus includes: a conversion coefficient calculation section that calculates, as a color conversion coefficient for converting a first color signal made up of a plurality of chrominance signals into a second color signal made up of a plurality of chrominance signals, a color conversion coefficient for converting a first spectral characteristic which characterizes the first color signal in a standard fashion into a second spectral characteristic which characterizes the second color signal; a correction coefficient calculation section that calculates a correction coefficient for approximating a base color signal which is the first color signal corresponding to a plurality of base colors into a reference color signal obtained based on the first spectral characteristic corresponding to a plurality of base colors; and a conversion coefficient correction section that corrects the color conversion coefficient by using the correction coefficient.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: May 8, 2012
    Assignee: Olympus Corporation
    Inventor: Hiroshi Suzuki
  • Publication number: 20120092505
    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: Application
    Filed: June 16, 2010
    Publication date: April 19, 2012
    Inventor: Muneaki Odawara
  • Patent number: 8159553
    Abstract: A method of generating a color characterization model for an input imaging device includes capturing a target having plural patches using the input imaging device to produce plural digital values in a device-dependent color space, the plural digital values having corresponding target measurements in a color characterization set. The method further includes determining if any of the plural digital values are collinear with each other, and removing, in a case where it is determined that digital values are collinear with each other, at least one of the collinear digital values and corresponding target measurements from the color characterization data set. In addition, the method includes generating the color characterization model for the input imaging device based on the plural digital values and corresponding target measurements remaining in the color characterization set. An apparatus for generating a color characterization model for an input imaging device is also provided.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 17, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Arkady Ten
  • Patent number: 8139117
    Abstract: A system for the automated analysis of image quality obtained by a camera in a camera tunnel system includes a test pattern on an item for placement in the camera tunnel system and an imaging subsystem configured to capture an image of the item using the camera tunnel system, wherein the image includes an image of the test pattern. The system further includes an image analysis tool configured to automatically identify and analyze the image of the test pattern for generating one or more image quality metrics.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: March 20, 2012
    Assignee: Sick, Inc.
    Inventors: John Dwinell, Long Xiang Bian
  • Patent number: 8120645
    Abstract: An adjuster plate is provided between a front rail and a camera unit body having cameras. Pre-dimensioned positioning pins protrude from upper and lower surfaces of the adjuster plate. The positioning pins protruding from the upper surface of the adjuster plate are positioned by being fitted in pin fitting holes provided in the front rail. The positioning pins protruding from the lower surface of the adjuster plate are positioned by being fitted in pin fitting holes provided in the camera unit body. Even when the positions of the pin fitting holes in the front rail are changed, it is possible to cope with the change by only changing the protruding positions of the positioning pins.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: February 21, 2012
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Satoshi Katahira, Nobuo Namiki
  • Patent number: 8098284
    Abstract: A measuring device includes an actuator which holds a lens unit and moves the lens unit in the direction of the optical axis thereof. A test chart is photographed, with the lens unit being opposed to a reference image pickup device, and the lens unit is positioned at a just-focus position. The gap between the reference image pickup device and the lens unit at this time is reproduced, and an image pickup device, which is to be integrated, and the lens unit are opposed with this gap, and are fixed.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: January 17, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akira Ushijima, Takeshi Karuishi
  • Publication number: 20120002058
    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: Application
    Filed: December 14, 2010
    Publication date: January 5, 2012
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: WEN-MIN NING
  • Patent number: 8089555
    Abstract: Methods and the corresponding device are presented for the correction of lateral chromatic aberration within a digital camera or other imaging device, using calibration approaches that do not require previously acquired lens data to effect the correction. An in-camera auto-calibration procedure is performed on the attached lens, such as when a lens is exchanged, and extracts parameters required for chromatic aberration correction, respecting zoom and focus, from one or more captured images. Based on image data extracted as a plurality of channels of a chromatic decomposition of the image, the chromatic aberration information for the lens is extracted. From the chromatic aberration information, the correction factors for the lens are determined.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: January 3, 2012
    Assignee: Zoran Corporation
    Inventors: Dudi Vakrat, Victor Pinto
  • Publication number: 20110310256
    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: Application
    Filed: May 31, 2011
    Publication date: December 22, 2011
    Applicant: MITUTOYO CORPORATION
    Inventor: Yuko SHISHIDO
  • Publication number: 20110279686
    Abstract: An image correction device includes an image capturing module, a first calculating module, a second calculating module, a third calculating module, and a correction module. The image capturing module includes an image sensor having a center (Xo, Yo). The image capturing module takes an image of a test chart. A center of the group of black stripes is coincident with a center of the image. The first calculating module is for calculating coordinates of a center of each black stripe of the group of black stripes. The second calculating module is for calculating coordinates (Xc, Yc) of the center of the image. The third calculating module is for calculating a coordinate deviation (?X, ?Y)=(Xc?Xo, Yc?Yo). The correction module is for inputting the coordinate deviation (?X, ?Y) into the image sensor so that the image sensor corrects the image according to the coordinate deviation (?X, ?Y).
    Type: Application
    Filed: December 14, 2010
    Publication date: November 17, 2011
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: WEN-MIN NING
  • Patent number: 8059183
    Abstract: When a chart is used as a subject, whether or not the chart can be captured for storage is determined based on the result obtained through distance measurement at a plurality of locations in a field captured for temporary display on a viewfinder. For example, a maximum difference of distances ?L is calculated. It is determined that the chart cannot be captured for storage if ?L is greater than a depth of field or is greater than a predetermined TL. A message indicating that the chart cannot be captured for storage is provided. Furthermore, it is determined that the subject is not the chart to be captured for storage if a subject size does not fall within a predetermined range.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: November 15, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takamasa Seto
  • Patent number: 8059155
    Abstract: A measuring system (200) for measuring a FOV of a digital camera module (52) includes a measuring chart (22), a parameter inputting module (32), and a processing module (42). The measuring chart defines a colored portion. The parameter inputting module is used to input relative parameters. The processing module is connected to the parameter inputting module and receives electronic image signals converted from images of the colored portion and of the measuring chart screened by the lens module. The processing module is configured for calculating the FOV ? of the digital camera module. A measuring method for measuring the FOV ? of the digital camera module is also provided.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: November 15, 2011
    Assignee: Altus Technology Inc.
    Inventors: Ching-Lung Jao, Kuo-Liang Tai
  • Publication number: 20110254963
    Abstract: Software, methods, and systems for calibrating photometric devices are provided. These involve using a non-uniform test illumination field to approximate a photon transfer curve by calculating stable pixel values and statistical dispersions on a pixel-by-pixel basis.
    Type: Application
    Filed: April 15, 2011
    Publication date: October 20, 2011
    Applicant: LIFE TECHNOLOGIES CORPORATION
    Inventors: Patrick D. KINNEY, Ryan J. TALBOT
  • Patent number: 8035688
    Abstract: A computer program product and method for calibrating and characterizing a color display perform calibrating and characterizing steps. A light source is operated in order to emit light from one or more light emitters on the light source. A color capture device, e.g., a digital camera, is calibrated and characterized based on the emitted light. Then, color images are displayed on the color display and captured on the color capture device. The color display is calibrated and characterized based on the captured color images. Computer program instructions are recorded on the computer readable medium, and are executable by a processor, for performing the calibrating and characterizing steps. A method for generating a controlled light source includes displaying light source selections to a user and receiving a user light source selection. Selected light emitters produce a light output matching the user light source selection.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: October 11, 2011
    Assignee: Xerox Corporation
    Inventors: David Snyderman, Geoffrey John Woolfe, Raja Bala
  • Patent number: 8022990
    Abstract: Certain embodiments of the present invention provide methods and systems for calibration of an imaging camera or other image acquisition device. Certain embodiments include characterizing a transformation from a coordinate system of an imager to a coordinate system of a first sensor positioned with respect to the imager using a first off-line calibration. Certain embodiments also include characterizing a transformation from a coordinate system of an imaging camera source to a coordinate system of a second sensor positioned with respect to the imaging camera source using a second off-line calibration. Additionally, certain embodiments include quantifying intrinsic parameters of the imaging camera source based on a transformation from the coordinate system of the imager to the coordinate system of the imaging camera source based on the first and second off-line calibrations and information from the first and second sensors and a transmitter positioned with respect to an object being imaged.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: September 20, 2011
    Assignee: General Electric Company
    Inventors: Dun Alex Li, Christopher Allen Nafis
  • Patent number: 8018504
    Abstract: Noise is reduced in a digital image generated by an imaging device utilizing information which specifies noise level as a function of position for the digital image. A noise reducing algorithm is applied to the digital image while one or more parameters of the noise reducing algorithm are varied. The one or more parameters are varied as a function of field position in the digital image based on the obtained noise level as a function of field position. In this way, noise is substantially reduced and is spatially equalized in the digital image.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: September 13, 2011
    Assignee: Eastman Kodak Company
    Inventor: Sean C. Kelly
  • Publication number: 20110216204
    Abstract: Systems, methods, apparatuses and computer program products for bio-image calibration are described. One aspect provides a bio-image calibration device including: a calibration portion comprising predetermined color areas; wherein the predetermined color areas are arranged in a predetermined pattern corresponding to a watermark; wherein the predetermined color areas are a predetermined size and a predetermined shape; and wherein the predetermined color areas are located on one or more edges of the bio-image device. Other embodiments are described.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 8, 2011
    Applicant: Skin Of Mine Dot Com, LLC,
    Inventor: Sean Erich Elwell
  • Publication number: 20110199491
    Abstract: Disclosed is a system to determine whether calibration indices are appropriate for each camera when calibrating large quantities of cameras, in which there is great variation in individual differences in image blurring characteristics. The present invention takes an image of a calibration index and calculates the calibration precision that can be expected in calibration from the calibration index image that has been taken. If the calibration precision that can be expected is not optimal for each camera, the density of lines or shapes that constitute the calibration index is changed until the optimum calibration index for each camera is found.
    Type: Application
    Filed: October 23, 2009
    Publication date: August 18, 2011
    Inventors: Takashi Jikihira, Junichi Funada
  • Patent number: 7999851
    Abstract: A method for calibration of an imaging device that includes a sensor and optics for forming an image on the sensor. The method includes making a first image quality measurement, based on an output of the sensor, while imaging a first target at a first distance from the device and varying an offset between the optics and the sensor. A second image quality measurement is made while imaging a second target at a second distance from the device, which is different from the first distance, and varying the offset between the optics and the sensor. A working point of the optics is set relative to the sensor responsively to the first and second image quality measurements.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: August 16, 2011
    Assignee: Tessera Technologies Ltd.
    Inventors: Liron Nunez Weissman, Uri Kinrot, Alex Alon, Irina Alon
  • Publication number: 20110181735
    Abstract: The present invention relates to a method for aligning a camera sensor to significant data which is text or barcode data to be recognized comprising the steps of:—capturing an image of the significant data by means of the camera sensor; —detecting a predominant alignment line of the significant data and detecting an angle thereof in relation to a horizontal line of the captured image; —determining image sections within the edge and line enhanced image which contain most likely significant data lines; —selecting a representative image section out of the determined image sections which is aligned with the predominant alignment line; —capturing a following image of the significant data; tracking the representative image section and determining the predominant alignment line out of the representative image section to achieve a fast calculation and audio or tactile feedback of the alignment quality to the user.
    Type: Application
    Filed: December 9, 2010
    Publication date: July 28, 2011
    Applicant: BEYO GMBH
    Inventors: Cuneyt Goktekin, Oliver Tenchio
  • Patent number: 7974466
    Abstract: A method for obtaining a target color measurement using an electronic image capturing device comprising the steps of: (1) determining one or more of a field correction array, level correction vectors, a color correction matrix, and a calibration correction and; (2) adjusting a target color measurement based upon one or more of a field correction array, level correction vector, a color correction matrix, and a calibration correction to obtain a corrected color target measurement.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: July 5, 2011
    Assignee: Color Savvy Systems Limited
    Inventors: Christopher H. Pearson, Gary N. Bodnar, Karl F. Seibert
  • Patent number: 7961134
    Abstract: Self-calibrating an automatic, surveillance-based change detection system operating on noisy imagery comprises detecting a first image co-registered with a second image, wherein the first image and the second image each comprise pixels of a noisy image of a scene; detecting the second image co-registered with the first image, wherein co-registration of the first image with the second image comprises pixels from different images corresponding to a same location within the scene; producing a calibration factor based on the co-registered images; producing a modified ratio of pixel values corresponding to the first image and the second image from the same location within the scene; and comparing the modified ratio to a pre-determined threshold ratio value.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: June 14, 2011
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Kenneth I. Ranney, Jeffrey Sichina
  • Patent number: 7948536
    Abstract: A method and apparatus for equalizing gain in an array of electron multiplication (EM) pixels is disclosed, each pixel having one or more impact ionization gain stages with implants to achieve charge transfer directionality and comprising a phase 1 clocked gate, an EM clocked gate, and two DC gates formed between the phase 1 clocked gate and the EM clocked gate, comprising the steps of (a) applying initial voltages to each of the DC gates and the EM clocked gates of at least two pixels of a plurality of pixels; (b) clocking phase 1 clock gates and an EM clock gates associated with the at least two pixels of the plurality of pixels a predetermined number of times to achieve an average pixel intensity value after impact ionization gain; and (c) selectively adjusting the difference in voltage between the DC gate and corresponding EM clocked gate of the at least two pixels of the plurality of pixels until the difference between the resulting pixel intensity values and the average pixel intensity value needed to p
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: May 24, 2011
    Assignee: SRI International
    Inventors: John Robertson Tower, Peter Alan Levine
  • Patent number: 7948519
    Abstract: An intelligent light source for use with the test of a digital camera module provides a plurality of shapes of light. A fast light pulse is created with turn-on and turn-off transitions less than or equal to one microsecond. Other waveform shapes comprise a ramp and a sinusoid, and all shapes can be made to occur once or repetitively. The magnitude of the light has a range from 0.01 LUX to 1000 LUX, and the ramp has a ramp time that has a range from microseconds to 100 ms. The light comprises of a plurality of colors created by serial connected strings of LED devices, where the LED devices in a string emit the same color. The light emanating from the light source is calibrated using a photo diode and the control of a tester by adjusting offset voltages of a DAC controlling a current through the LED strings.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: May 24, 2011
    Assignee: Digital Imaging Systems GmbH
    Inventors: Horst Knoedgen, Dirk Huettmann
  • Publication number: 20110115922
    Abstract: A calibration apparatus for executing a camera calibration for each of a plurality of cameras mounted on an object so that image capturing ranges of two of the plurality of cameras overlap each other, the calibration apparatus includes an image obtaining unit configured to obtain first and second images captured by the two cameras, a temporary link structure forming unit configured to form a temporary link structure by using the first and second images including images of markers sets, a link angle determining unit configured to determine an effective link angle to form an effective link structure from the temporary link structure, and a parameter determining unit configured to determine a parameter for positioning at least one of the cameras on the basis of the effective link angle.
    Type: Application
    Filed: November 16, 2010
    Publication date: May 19, 2011
    Applicant: FUJITSU LIMITED
    Inventor: Seiya SHIMIZU
  • Patent number: 7911500
    Abstract: An image processing device includes: a connecting unit that connects a projecting device and an image capture device, at least one of the projecting device and the image capture device having an adjustable position; an acquiring unit that acquires an image captured by the image capture device capturing an image of a reference pattern that is projected by the projecting device and indicates an effective projecting range of the projecting device; a color converting unit that extracts the reference pattern from the captured image, and performs a color conversion on the extracted reference pattern; an enlarging/reducing unit that enlarges or reduces the color-converted reference pattern in accordance with the ratio between the maximum effective imaging range of the image capture device and the effective projecting range of the projecting device; a superimposing unit that superimposes the enlarged or reduced reference pattern on a reference pattern yet to be projected; and an output unit that outputs the reference
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: March 22, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shingo Uchihashi, Hiroyuki Miyake
  • Patent number: 7893975
    Abstract: An automated RAW image processing method and system are disclosed. A RAW image and metadata related to the RAW image are obtained from a digital camera or other source. The RAW image and the related metadata are automatically processed using an Operating System service of a processing device to produce a resulting image in an absolute color space. When automatically processing, a predetermined tone reproduction curve is applied to the interpolate RAW image to produce the resulting image. The predetermined tone reproduction curve is derived from a plurality of reference images and is selected based on the metadata associated with the RAW image. The resulting image is then made available to an application program executing on the processing device through an application program interface with the Operating System service.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: February 22, 2011
    Assignee: Apple Inc.
    Inventors: Mark Zimmer, David Hayward, Gabriel G. Marcu
  • Patent number: 7889234
    Abstract: A method and apparatus for providing a distortion corrected video signal. A camera is directed toward a test pattern for producing a raw video signal. An image processor is operatively connected to the camera for receiving the raw video signal. The image processor is operable to capture at least one calibration image of the test pattern using the raw video signal from the camera, analyze the at least one calibration image to provide a calibration data table, and store the calibration data table within the image processor.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: February 15, 2011
    Assignee: Delphi Technologies, Inc.
    Inventors: Steven A. Williams, Arnab S. Dhua
  • Patent number: 7885526
    Abstract: A target (10, 20) is disclosed suitable for setting the exposure and white balance of a photographic digital camera. The target (10, 20) comprises a target surface (12) that has a reflectance of 18% for all wavelengths of visible light. The target surface (12) is provided with a feature (16) upon which the camera is able to focus.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: February 8, 2011
    Assignee: Lastolite Limited
    Inventor: Sean Henry
  • Publication number: 20110018965
    Abstract: An apparatus for enabling geometric lens distortion calibration for a metric digital camera includes a turntable, a cage mounted on the turntable, and an array of targets disposed on the cage. The device provides distribution of image references points in three planes and is rotatable, allowing minimal movement of the camera being calibrated in three dimensions and reducing space requirements for calibration facilities.
    Type: Application
    Filed: July 23, 2010
    Publication date: January 27, 2011
    Applicant: Geospatial Systems, Inc.
    Inventors: Nikolaus Andrew Schad, Matthew Vartan Kremens
  • Publication number: 20100302370
    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: Application
    Filed: August 13, 2010
    Publication date: December 2, 2010
    Applicant: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Yoshiyuki SOGAWA, Keiichi Murakami, Yoshio Tozawa
  • Patent number: 7844109
    Abstract: In order to allow a user to arbitrarily set color processing parameters which determine the color reproduction characteristics of a digital camera according to user's preference, an image processing unit obtains color data by performing the same processing as that performed by the digital camera with respect to the sensed data of each color patch included in a color chart by using color processing parameters. A changing unit displays, on a display unit, a target data changing window which presents color data and the target data (the target color of color reproduction) of each color patch and allows the user to change the target data. A parameter editing unit edits color processing parameters so as to reduce the color difference between the changed target data and color data. A data input/output unit transmits the edited color processing parameters to the digital camera.
    Type: Grant
    Filed: September 20, 2004
    Date of Patent: November 30, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takahiro Matsuura
  • Patent number: 7834905
    Abstract: The invention relates to an improved method for visualizing the environment of a vehicle, especially in the dark. The invention also relates to a night vision system, which especially provides a visual image of the environment or the digital data thereof. Preferably, the visual image is a color image which indicates the visually perceptible objects of the environment. The system also provides an infrared image of the environment or the digital data thereof. The infrared image indicates the infrared radiation radiated by the visually perceptible and/or other objections. In a preferred form of embodiment, a merged image of the visual image and the infrared image of largely identical sections of the environment of the vehicle is represented on a display comprising at least one merged region and at least one region which is not merged or not merged to the same extent or not merged with the same weighting.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: November 16, 2010
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Wolfgang Hahn, Thomas Weidner
  • Publication number: 20100245593
    Abstract: An apparatus for calibrating images between cameras, includes: a detector for detecting dynamic markers from images taken by a motion capture camera and a video camera; a 3D position recovery unit for recovering 3D position data of the dynamic markers obtained by the motion capture camera; a 2D position tracking unit for tracking 2D position data of the dynamic markers obtained by the video camera; a matching unit for matching the 3D position data and the 2D position data of the dynamic markers; and a calibrating unit for converting the 3D position of the dynamic markers on a spatial coordinate system into image coordinates on an image coordinate system of the video camera to calculate intrinsic parameters and extrinsic parameters of the video camera to minimize a difference between coordinates of the 2D position data and the image coordinates.
    Type: Application
    Filed: August 28, 2009
    Publication date: September 30, 2010
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jong Sung Kim, Hye-mi Kim, Jae-Hean Kim
  • Publication number: 20100245594
    Abstract: In one embodiment, the present invention is a camera calibration tool. One embodiment of a three-dimensional test target for calibrating an image capturing device includes a first planar face exhibiting a first color, a second planar face exhibiting a two-toned pattern of a second color and a third color, and a third planar face exhibiting the two-toned pattern of the second color and the third color, wherein the first planar face, the second planar face, and the third planar face meet at a first right-angle convex vertex.
    Type: Application
    Filed: October 12, 2009
    Publication date: September 30, 2010
    Inventors: C. DAVID TOBIE, Shawn Clark, Joe Reed
  • Publication number: 20100238298
    Abstract: Self-calibrating an automatic, surveillance-based change detection system operating on noisy imagery comprises detecting a first image co-registered with a second image, wherein the first image and the second image each comprise pixels of a noisy image of a scene; detecting the second image co-registered with the first image, wherein co-registration of the first image with the second image comprises pixels from different images corresponding to a same location within the scene; producing a calibration factor based on the co-registered images; producing a modified ratio of pixel values corresponding to the first image and the second image from the same location within the scene; and comparing the modified ratio to a pre-determined threshold ratio value.
    Type: Application
    Filed: September 21, 2009
    Publication date: September 23, 2010
    Inventors: KENNETH I. RANNEY, JEFFREY SICHINA
  • Publication number: 20100225769
    Abstract: The present invention relates to a standard color referencing panel system for cinematography that reproduces the original colors of captured images. The standard color referencing panel system for cinematography includes a memory that stores scene display content and standard color display content of an object to be captured; an input unit that allows a user to turn on a power switch and an image capture start switch; a controller that supplies power in response to a power switch on a signal received from the input unit, transmits control signals in response to an image capture start switch on the signal received from the input unit, and reads the scene display content and the standard color display content from the memory; and a display unit that is supplied with power from the controller to preheat a screen, and displays the scene display content and the standard color display content on the screen in response to the control signals transmitted from the controller.
    Type: Application
    Filed: March 21, 2008
    Publication date: September 9, 2010
    Inventors: Maeng Sub Cho, Jin Seo Kim
  • Patent number: 7782360
    Abstract: A portable, self contained, deployable test pattern display, for use in optimising imaging quality having a portable protective display housing, a test pattern incorporating imaging information contained in and deployable from the housing, a retraction device connected to the test pattern for replacing it within the housing, so that the test pattern can be carried to a desired location, protected by the housing, and the test pattern can be deployed from the housing when required, and can then be replaced within the housing.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: August 24, 2010
    Inventor: Ferrand D E Corley
  • Publication number: 20100208080
    Abstract: An imaging apparatus includes an image pickup device, a device that obtains an image from the image pickup device, a sensor that detects a roll angle of the sensor, wherein the sensor detects a reference roll angle of the sensor when the imaging apparatus is disposed at a predetermined roll angle, a device that calculates a reference roll angle of the image pickup device by using a reference image from the image pickup device when the imaging apparatus is disposed at the predetermined roll angle and a device that corrects a roll angle of the sensor by calculating a relative roll angle from the reference roll angle of the image pickup device and the reference roll angle of the sensor.
    Type: Application
    Filed: July 23, 2008
    Publication date: August 19, 2010
    Applicant: RICOH COMPANY, LTD.
    Inventor: Atsushi Matsutani