With Circuit Detail Patents (Class 348/133)
  • Patent number: 11885751
    Abstract: A testing device for detecting defects of transparent test specimens, in particular of ophthalmological lenses, has an illumination device for transilluminating test specimens to be examined and with an image acquisition device for imaging the test specimen transilluminated by the illumination device. The illumination device includes a plurality of linearly adjustable light sources for generating a stripe pattern. To capture the stripe pattern, the acquisition duration of the image acquisition device can be adjusted in such a way that the light emitted by each of the light sources is detected as a light stripe. Further, the disclosure relates to a testing method for detecting a defect of a transparent specimen.
    Type: Grant
    Filed: September 18, 2023
    Date of Patent: January 30, 2024
    Assignee: Carl Zeiss Vision International GmbH
    Inventors: Marc Flemming, Hannes Scheibe, Dominik Wiedemann, Alexander Friedl, Daniel Schoebel
  • Patent number: 11243459
    Abstract: An image projection apparatus includes a light irradiation device configured to irradiate a laser beam, an optical scan device configured to deflect the laser beam to make an optical scan, and project an image on a display region, an optical sensor arranged outside the display region, and including a first light receiving region and a second light receiving region that are arranged at different positions along a vertical scanning direction of the optical scan, and a deflection angle controller. The deflection angle controller corrects a deflection angle in the vertical scanning direction of the optical scan device, based on a number of times the laser beam is detected by the first light receiving region and a number of times the laser beam is detected by the second light receiving region.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: February 8, 2022
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yuji Kimura, Toyoki Tanaka, Motoi Komatsu
  • Patent number: 10313492
    Abstract: A transmitting apparatus is provided. The transmitting apparatus includes at least one processor configured to implement: an L1 signaling generator configured to generate L1 signaling; a frame generator configured to generate a frame having a payload in which a plurality of Physical Layer Pipes (PLPs) are included; and a signal processor configured to transmit the frame by adding a preamble including the L1 signaling in the frame. The L1 signaling includes first information representing an alignment state of starting positions of PLPs included in different layers among the plurality of PLPs and second information representing at least one offset of the starting positions. Accordingly, the preamble includes the L1 signaling including information on an arrangement order of the plurality of PLPs included in the payload.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: June 4, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young-ho Oh, Hak-ju Lee
  • Patent number: 10261031
    Abstract: Provided herein is a mask inspection device, including an inspection base, a shift platform, a rotating platform, a bearing platform, a laser ranging module, a vertical shift module, a processing module, and an image capturing module. A mask, which is carried and held by the bearing platform, includes a dust-proof film, each region of which is measured by the laser ranging module for generating a distance measuring signal; each distance measuring signal is utilized to control the movement of the vertical shift module, such that image capturing module can take an inspection image of that region. Based on the distance measuring signals and inspection images, height information of the dust-proof film and inspection information can be acquired. Also provided herein is a method applicable to said mask inspection device.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: April 16, 2019
    Assignee: Acemach Co., Ltd.
    Inventor: Chih-Chiang Chang
  • Patent number: 10067066
    Abstract: A container inspection device and a container inspection device for inspecting containers are provided. The container inspection device comprises at least one light source for illuminating containers in an inspection clock for inspecting the containers. The container inspection device drives the at least one light source such that the at least one light source is observed by a person as constantly shining independent of the inspection clock.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: September 4, 2018
    Assignee: KRONES AG
    Inventor: Herbert Kolb
  • Patent number: 9710905
    Abstract: In a mask inspection apparatus, a defect detection unit includes a first memory region, a second memory region, an inspection condition reconfiguring unit, and a comparison unit. The inspection condition reconfiguring unit obtains a difference between gray scales of an optical image stored in the second memory region and a reference image stored in the first memory region. The existence of the defect is determined in the case where the difference is larger than a first threshold value. Further in the case where the number of defects is larger than a second threshold value, an inspection condition is re-estimated and configured and the reference image is regenerated. A comparison unit compares the stored reference image with the stored optical image in the case where the inspection condition is not reconfigured, and compares the regenerated reference image with the stored optical image in the case where the inspection condition is reconfigured.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: July 18, 2017
    Assignee: NuFlare Technology, Inc.
    Inventor: Takafumi Inoue
  • Patent number: 9121765
    Abstract: A method and a device for inspecting containers and/or preforms. A scattering medium is provided in the interior of the containers or preforms and is irradiated in such manner that the scattering medium forms a bright field behind the container or preform wall area to be imaged. In this way, the wall area can easily be illuminated and imaged from different directions, so that inspection units can be created with a high degree of design freedom and with smaller dimensions.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: September 1, 2015
    Assignee: KRONES AG
    Inventor: Peter Lindner
  • Patent number: 9001275
    Abstract: HDMI is a digital audio and video communications protocol commonly used in consumer electronics. HDMI is particularly synonymous with high fidelity audio and video. Even though HDMI is a digital communications protocol, the audio quality can be impaired by analog signal impairments and distortions even if there are no digital decoding errors. In particular, the very process by which the audio is converted from Digital (HDMI) to human audible “Analog Audio” can be prone to errors. This occurs when the Digital to Analog Converter (DAC) clock, which is derived from the HDMI TMDS clock or HDMI source, is “distorted” due to its jitter, resulting in erroneous sampling or outputting of vital audio samples, thereby reducing the audio quality of the experience. The present invention reduces the jitter on the TMDS clock, and hence the audio DAC clock, resulting in lower audio distortion.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: April 7, 2015
    Inventors: Andrew Joo Kim, David Anthony Stelliga
  • Patent number: 9001214
    Abstract: A method, system and reference target for estimating spectral data on a selected one of three spectral information types is disclosed. Spectral information types comprise illumination of a scene, spectral sensitivity of an imager imaging the scene and reflectance of a surface in the scene. The method comprises obtaining a ranking order for plural sensor responses produced by the imager, each sensor responses being produced from a reference target in the scene, obtaining, from an alternate source, data on the other two spectral information types, determining a set of constraints, the set including, for each sequential pair combination of sensor responses when taken in said ranking order, a constraint determined in dependence on the ranking and on the other two spectral information types for the respective sensor responses and, in dependence on the ranking order and on the set of constraints, determining said spectral data that optimally satisfies said constraints.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: April 7, 2015
    Assignee: University of East Anglia
    Inventor: Graham Finlayson
  • Patent number: 8994815
    Abstract: The present invention is intended to provide a contour extraction method and a contour extraction device with an objective of either suppression of unnecessary contouring processings or selective contouring of necessary portions. To attain the objective, provided are a contour extraction method, and a device, with which contours of pattern edges on an image formed based on charged particles emitted from a sample are extracted and, when contouring of a pattern located in an overlapping region provided in connecting images of plural image-capturing regions to form a synthesized image is performed, either areas of the pattern in the plurality of image-capturing regions, or a pre-set measurement portion is found, and selective contour extraction of the pattern with respect to an image of an image-capturing region is carried out either on a side where the area is large, or on a side where a measurement portion regarding the pattern is located.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: March 31, 2015
    Assignee: Hitachi High—Technologies Corporation
    Inventors: Hiroaki Mito, Ryoichi Matsuoka
  • Patent number: 8976240
    Abstract: Systems, methods, and other embodiments associated with producing spatially varying spectral response calibration data are described. One example method includes controlling a digital camera to capture characteristic data arrays from light sensors in the digital camera in response to the digital camera being exposed to light stimuli from a multi-spectral reference display. The data arrays will be acquired multiple times at multiple locations in multiple stimuli provided from the multi-spectral reference display. The method also includes controlling a calibration logic to manipulate characteristic data arrays to produce spatially varying spectral response calibration data as a function of using characteristic data arrays and known wavelengths of the light in light stimuli. The method may also include providing the spatially varying spectral response calibration data to a downstream consumer (e.g., correction process, quality control process), displaying the data, or storing the data.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: March 10, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kevin Matherson, Yu-Wei Wang
  • Patent number: 8970696
    Abstract: Disclosed are a hand positioning method and a human-computer interaction system. The method comprises a step of continuously capturing a current image so as to obtain a sequence of video images; a step of extracting a foreground image from each of the captured video images, and then carrying out binary processing so as to obtain a binary foreground image; a step of obtaining a vertex set of a minimum convex hull of the binary foreground image, and then creating areas of concern serving as candidate hand areas; and a step of extracting hand imaging features from the respective created areas of concern, and then determining a hand area from the candidate hand areas by carrying out pattern recognition based on the extracted hand imaging features.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: March 3, 2015
    Assignee: Ricoh Company, Ltd.
    Inventor: Huaixin Xiong
  • Patent number: 8934007
    Abstract: A system for detecting stress in rails includes a railcar, having a rail temperature detector, and a rail imaging device oriented to produce images of rail joints and rail anchors. The imaging device and temperature detector are connected to a computer controller, which is programmed to provide an output signal indicative of estimated axial stress in the rail based upon rail temperature and the images of at least one of the rail joints and rail anchors.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: January 13, 2015
    Assignee: Georgetown Rail Equipment Company
    Inventor: Edwin deSteiguer Snead
  • Patent number: 8872086
    Abstract: A photoelectric conversion device comprises: a plurality of photoelectric conversion elements each having a photo-sensing surface; insulation films; a plurality of light-guiding portions arranged above the insulation films, each of the plurality of light-guiding portions guiding light on the photo-sensing surface of each of the plurality of photoelectric conversion elements; and boundary portions, each of the boundary portions defines a boundary between the adjacent light-guiding portions and is formed of a material lower in refractive index than a material that forms the plurality of light-guiding portions, wherein a width of each of the boundary portions is not more than half a shortest wavelength in a wavelength range of visible light, and a height from a lower surface to an upper surface of each of the plurality of light-guiding portions is not less than double a longest wavelength in the wavelength range of visible light.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: October 28, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichiro Yamashita
  • Publication number: 20140313320
    Abstract: An image pickup apparatus includes: an interest area setter configured to input a signal for setting multiple interest areas inside an image pickup area of an image sensor; a readout area setter configured to set a readout area from which an image signal is read out from the image sensor; a sensor readout controller configured to control readout of a pixel signal of the readout area from the image sensor; an output signal generator configured to generate an image signal to be output based on the pixel signal read out by the sensor readout controller; and a boundary identifier configured to make identifiable a boundary of each of the multiple interest areas in an image formed by the image signal to be output.
    Type: Application
    Filed: April 18, 2014
    Publication date: October 23, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Takayuki KIKUCHI
  • Patent number: 8842223
    Abstract: The present technology relates to a transmitter apparatus, an information processing method, a program, and a transmitter system capable of easily transmitting a wideband signal. The transmitter apparatus includes: a first acquisition unit that obtains first transmission control information; a second acquisition unit that obtains second transmission control information similar to information input to another transmitter apparatus; and a generating unit that processes transmission target data based on a parameter contained in the first transmission control information and generates data including the processed transmission target data and the second transmission control information. The present technology can be applied to a transmitter apparatus that transmits a DVB-C2 signal.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: September 23, 2014
    Assignee: Sony Corporation
    Inventors: Hiroo Takahashi, Lachlan Bruce Michael, Takashi Yokokawa, Naoki Yoshimochi, Takahiro Okada
  • Patent number: 8798320
    Abstract: Apparatus and method for processing a sequence of images of a scene, the method including: tracking a region of interest in the sequence of images (e.g. using a Self Adaptive Discriminant filter); selecting a particular image in the sequence; selecting a set of images from the sequence, the set having one or more images that precede the particular image in the sequence of images; for each pixel in the region of interest in the particular image, determining a value for a parameter; for each pixel in the region of interest of each image in the set of images, determining a value for the parameters; and comparing a function of the determined values for the region of interest in the particular image to a further function of the determined values for the regions of interest in the images in the set of images.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: August 5, 2014
    Assignee: BAE Systems PLC
    Inventors: Benjamin James Stephens, Yoann Paul Georges Thueux, Mark Lawrence Williams
  • Patent number: 8537215
    Abstract: A multi-camera skin inspection system for inspecting the outer skin and the skin perimeter of extruded ceramic honeycomb structures is disclosed. The system has a camera that captures first digital line images of a line-illuminated portion of the outer skin as the ceramic honeycomb structure rotates to form a scanned digital image of the outer skin. The system also has second and third cameras that respectively capture second and third digital line images of illuminated first and second endfaces, including the corresponding first and second skin perimeters, as the ceramic honeycomb structure rotates to form scanned digital images of the ceramic honeycomb structure perimeters. The system also forms a composite image from the three scanned images and identifies at least one defect in the ceramic honeycomb structure from the composite image.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: September 17, 2013
    Assignee: Corning Incorporated
    Inventors: Robertson Dewhurst Booth, Uta-Barbara Goers
  • Patent number: 8487992
    Abstract: The invention provides an image processing device and an image processing method which can efficiently make use of memory resources, and can also edit and simulate a registered image or the like so as to reflect the registered image or the like after editing in a normal operation without stopping the normal operation, and further to enhance production efficiency. When data for image processing edited in a second processing section is to be reflected in image processing (normal operation) that is continuously executed in a first processing section, the edited data for image processing is transmitted from a third data storage area to a second data storage area, and the edited data for image processing is read from the second data storage area when image processing is executed by use of the edited data for image processing in the first processing section.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: July 16, 2013
    Assignee: Keyence Corporation
    Inventors: Akinobu Seri, Hidetoshi Morimoto
  • Patent number: 8310536
    Abstract: An apparatus and method are provided for measuring the end surface of a disk-shaped semiconductor wafer based on its projection image, without the influence of contaminants on the end surface. A rotation supporting mechanism supports a wafer between a first supporting position rotated by +?relative to a predetermined reference position and a second supporting position rotated by ??degrees at two or more supporting positions. An image sensor picks up a projection image of the wafer's end surface. An index value for the end surface is calculated for each of a plurality of obtained projection images. One representative value of the calculated index values or an aggregate value is obtained, and a shape measurement of the wafer's end surface corresponding to the reference supporting position is derived. When the wafer's radius and a chamfer width are set as r and k, ??cos?1 ((r-k)/r) is satisfied.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: November 13, 2012
    Assignee: Kobelco Research Institute, Inc.
    Inventors: Masaru Akamatsu, Hidehisa Hashizume, Yasuhide Nakai
  • Patent number: 8120656
    Abstract: This invention is to provide an assembly module comprising a board, a frame disposed on a surface of the board, and a circuit board disposed on another surface of the board, wherein the circuit board includes a power line and an image transmission line for directly connecting to a camera power line and a video cable of a surveillance camera respectively. A hollow padding is added into a wire passing hole disposed in the board, and a size of the hollow padding may be adjusted according to the width of a wire of the surveillance camera, which passes through the hollow padding. Therefore, problems such as needing to make enough space in a wall or a ceiling for receiving a video transmitter, requiring an additional device for connecting to power supply, and having gaps being left between the wire and the wire passing hole may be resolved simultaneously.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: February 21, 2012
    Inventors: Shih-Ming Hwang, Liang-Lun Hwang, Chien-Jong Hwang
  • Patent number: 8081212
    Abstract: An abnormality detecting apparatus comprises a synchronous detecting circuit for detecting a synchronous signal from a video signal outputted from a camera unit, and an abnormality detecting circuit for judging whether or not a first direct current signal level obtained from an input path of said video signal is greater than a predetermined first threshold value, whether or not a second direct current signal level obtained from said input path of said video signal is smaller than a predetermined second threshold value, and whether or not said synchronous signal is detected by said synchronous detecting circuit, and determining that said input path of said video signal is in one of a normal state, an open state, a power connected state, and a ground connected state based on the result of the judgments.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: December 20, 2011
    Assignee: Panasonic Corporation
    Inventors: Kenji Yoshioka, Masaki Sato
  • Patent number: 7978260
    Abstract: A method and camera for electronic image capture provide an electronic image capture device, a scanning aperture shutter located to control light energy received by the image capture device, a flash unit oriented to illuminate an image scene, a photocell unit adapted for sensing visible spectrum energy and infrared spectrum energy received from the image scene, and an exposure control system responsive to the photocell unit and operatively connected to the scanning aperture shutter and the flash unit. The exposure control system is adapted to control an amount of fill flash energy received from the image scene in relation to visible ambient light energy received from the image scene during image capture by illuminating the flash unit once a predetermined amount of ambient visible spectrum energy is sensed by the photocell unit and by extinguishing the flash unit once a predetermined amount of infrared energy is sensed by the photocell unit.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: July 12, 2011
    Assignee: Senshin Capital, LLC
    Inventor: Norman D. Staller
  • Patent number: 7813537
    Abstract: Myocardial tissue tracking techniques are used to project or guide a single manually-defined set of myocardial contours through time. Displacement encoding with stimulated echoes (DENSE), harmonic phase (HARP) and speckle tracking is used to encode tissue displacement into the phase of complex MRI images, providing a time series of these images, and facilitating the non-invasive study of myocardial kinematics. Epicardial and endocardial contours need to be defined at each frame on cine DENSE images for the quantification of regional displacement and strain as a function of time. The disclosed method presents a novel and effective two dimensional semi-automated segmentation technique that uses the encoded motion to project a manually defined region of interest through time. Contours can then easily be extracted for each cardiac phase.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: October 12, 2010
    Assignees: Siemens Medical Solutions USA, Inc., University of Virginia Patent Foundation, University of Cape Town
    Inventors: Frederick H Epstein, Ernesta M Meintjes, Bruce S Spottiswoode
  • Patent number: 7760930
    Abstract: The present disclosure provides a system and method for recognizing a defect image associated with a semiconductor substrate. In one example, the method includes collecting defect data of the defect image by testing and measuring the semiconductor substrate, extracting a pattern from the defect data, normalizing a location, orientation, and size of the pattern, and identifying the pattern after the pattern is normalized.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: July 20, 2010
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chen-Ting Lin, Chih-Cheng Chou, Chih-Hung Wu, Chia-Hua Chang
  • Patent number: 7280151
    Abstract: A video camera is disclosed which can make photographing without any compulsion. A rotary grip is provided on a side face of a camera body so as to be rotatable relative to the camera body, the camera body having an image pickup device, a camera lens and a circuit board of various circuits. A hand strap is attached to the rotary grip. For carrying the video camera, the fingers other than the thumb of one hand are inserted between the rotary grip and the hand strap so that the tips thereof are caught on a peripheral surface of the rotary grip. A liquid crystal display monitor and an operating unit are integral with the peripheral surface of the rotary grip, and when the rotary grip is rotated relative to the camera body unit, the hand strap, as well as the liquid crystal display monitor and the operating unit, also rotate.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: October 9, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Akira Kojima, Yuichiro Kota, Minoru Ikeda
  • Patent number: 6989857
    Abstract: An inspection system completes two inspections with a single camera. In one inspection polarized light illuminates the side wall of a bottle, passes through a pair of electrode surfaces on either side of a ferroelectric crystal which do not change the polarity and passes through a polarizer to image on the camera. In a second inspection the polarized light is rotated 90° by the same structure so that only light rotated as a result of stress in the bottle passes through the polarizer and images on the camera as a defect.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: January 24, 2006
    Assignee: Emhart Glass S.A.
    Inventor: William J. Furnas
  • Patent number: 6952491
    Abstract: A method and apparatus for inspecting the surface of articles, such as chips and wafers, for defects, includes a first phase of optically examining the complete surface of the article inspected at a relatively high speed and with a relatively low spatial resolution, and a second phase of optically examining with a relatively high spatial resolution only the suspected locations for the presence or absence of a defect therein.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: October 4, 2005
    Assignee: Applied Materials, Inc.
    Inventors: David Alumot, Gad Neumann, Rivka Sherman, Ehud Tirosh
  • Patent number: 6940999
    Abstract: An efficient approach to exploit hyperspectral imagery and detect target of interest is disclosed. This approach uses proximity pixels as reference signatures to detect potential discontinuity that represents material of unknown existing on the terrain. By incorporating signature of a chosen material of interest, this approach provides an effective way for target detection and identification. An evolutionary algorithm is employed to estimate the abundance of material of interest.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: September 6, 2005
    Assignee: American GNC Corp.
    Inventor: Ching-Fang Lin
  • Patent number: 6610991
    Abstract: An electronics assembly apparatus, and its imaging system are disclosed. The imaging system, which can include a linescan sensor, measures the height of an object on a component as well as the coplanarity of object features by viewing the object features from a plurality of view angles.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: August 26, 2003
    Assignee: CyberOptics Corporation
    Inventor: Steven K. Case
  • Patent number: 6608320
    Abstract: A pick and place machine, and its imaging system are disclosed. The imaging system is movable with a head of the pick and place machine and includes a linear detector which is adapted to move proximate the component to thereby scan the component. The imaging system provides an indication of feature height on a component held by the pick and place machine. The height is based upon the intensity of a plurality of focused images. A method for sensing feature height of an object on a component as well as the coplanarity of objects held by a pick and place machine is also provided.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: August 19, 2003
    Assignee: CyberOptics Corporation
    Inventors: Timothy A. Skunes, Steven K. Case
  • Publication number: 20020026636
    Abstract: The invention concerns a video interfacing arrangement for connecting at least one display device to at least one video source composed of a module including a dedicated and programmed digital processing unit adapted to decode and descramble video flow according to a preloaded decoding or descrambling program, in order to display, in real time or delayed in time, to store, to record and/or to send over a telecommunication network, and on at least one screen interface, at least one storage or recording interface, a local or wide area network connecting interface and a user communication and controlling interface, the interfaces being linked to and driven by the processing unit and preferably mounted in or on the module. The invention also concerns a distribution system and a method for transferring encoded video programs and sequences over a wide area network.
    Type: Application
    Filed: June 14, 2001
    Publication date: February 28, 2002
    Inventor: Daniel LeComte
  • Patent number: 5912699
    Abstract: A high speed image capture apparatus includes a camera with an integration period between consecutive flashes of an illuminating light pulse, where the camera has an image read out period and an image output. A timer for provides a strobe output representative of the start of a flash. An image capture apparatus captures a first image during the integration period and a second image within a predetermined time after capturing the first image but before the image read out period has elapsed so as to substantially increase a rate of producing usable image outputs. The image capture apparatus is coupled to the strobe output and the image output.
    Type: Grant
    Filed: September 7, 1994
    Date of Patent: June 15, 1999
    Assignee: NeoPath, Inc.
    Inventors: Jon W. Hayenga, Louis R. Piloco
  • Patent number: 5440648
    Abstract: A defect detection system includes a video camera with defect detection circuits for detecting defects in video signals being outputted by corresponding sections of an array sensor such as a TDI CCD two-dimensional array sensor. Each defect detection circuit includes a subtraction circuit for subtracting a prior stored pixel from an incoming pixel to generate a difference. Comparators compare the difference with positive and negative limits defining an acceptable range of difference values. The prior stored pixel is updated to the succeeding pixel only when the difference value is acceptable. Memories store the defect pixels from the respective detection circuits along with X-coordinates and end of line bits. The memories are sequentially read up to their end of line bits, and the defect pixel values along with coordinates expanded to include section indicating bits are transferred from the camera to further processing facilities.
    Type: Grant
    Filed: November 19, 1991
    Date of Patent: August 8, 1995
    Assignees: Dalsa, Inc., E. I. Du Pont de Nemours & Company
    Inventors: James W. Roberts, John G. Elias, Graham A. Jullien
  • Patent number: 5377279
    Abstract: A method of displaying a defect appearing on an elongated object conveyed in one direction. The method comprises the steps of scanning the object in the width direction thereof by means of a sensor camera, and obtaining object image data corresponding to the object, processing the object image data, to detect a defect in the object, storing the object image data in an image memory in a scroll manner, stopping the scroll storing of the object image data in the image memory and storing the object image data output subsequently from the sensor camera in the other image memory in response to the detection of the defect, and retaining the object image data including the defect in the image memories as still image data, and displaying the still image data read out from the image memories on a monitor screen as a still image such that the defect is displayed at a predetermined position on the monitor screen.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: December 27, 1994
    Assignee: Futec Inc.
    Inventors: Hideyuki Hanafusa, Masami Nishio