Patents Examined by Robert M. Bauer
  • Patent number: 5012327
    Abstract: A color field 1 detector includes analog and digital processor sections, wherein the analog processor section receives a video signal input and provides the digital signals necessary to drive the digital processor section. A timing generator receives a free-running reference clock and supplies an internal reference signal of subcarrier frequency starting at the falling edge of composite sync. A burst phase comparator compares the incoming color burst phase to the internal reference signal phase and generates logic signals indicative of the phase relationships therebetween to thus indicate whether the color burst is in phase, out of phase, or if any phase error exists. A state machine receives the logic signals and detects the sequence of occurrence of the states of the color burst relative to the internal reference signal. The sequence is indicative of the subcarrier-to-composite sync phase of the video signal input for the particular color television standard.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: April 30, 1991
    Assignee: Ampex Corporation
    Inventor: Thomas S. Bishop
  • Patent number: 4994920
    Abstract: A focus detecting device arranged to evaluate the focused state of an object's image by using an image signal obtained from an image sensor comprises: a first detecting circuit which detects the maximum differential value of the image signal; a second detecting circuit which detects the width of an edge part of the object's image; and an evaluation circuit which is arranged to evaluate the focused state of said object's image by suitably combining, according to a focused degree detected, the detection values produced from the first and second detecting circuits.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: February 19, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiro Fujiwara, Masamichi Toyama, Hirofumi Suda, Kunihiko Yamada
  • Patent number: 4972254
    Abstract: The solid state image sensor has a photosensing region formed on a substrate. The photosensing region has a plurality of photocells for receiving an incident image. The photosensing region is capable of changing image sampling modes by relatively shifting image sampling points for the incident image. In the photosensing region, a plurality of first transfer elements are formed and the first transfer elements receive the signal charges from adjoining photocells and transfer them out. Further, a temporary storage region is formed on the substrate having a plurality of second transfer elements therein for each of the first transfer elements. Each of the second transfer elements has a capacity to accommodate all of the signal charges of a corresponding first transfer elements which are read out from the photocells at the same time. A plurality of gate elements are respectively formed between each of the first transfer elements and their corresponding plurality of second transfer elements.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: November 20, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yukio Endo, Nozomu Harada, Hidenori Shibata, Yoshiyuki Matsunaga
  • Patent number: 4970585
    Abstract: There are provided a plurality of light sources emitting different color lights, and switch means for selectively lighting either one or all of the light sources. The lights reflected by a multicolor manuscript are converted into electric outputs by an image sensor. The output of the image sensor of the portion of the manuscript having the same color as the lighted light source is caused to exceed a predetermined binarizing level, whereby that portion of the manuscript is prevented from being read.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: November 13, 1990
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Masami Kurata
  • Patent number: 4970581
    Abstract: A multi-standard color field sequence detector includes an analog and a digital processor section, wherein the analog processor section receives a reference video input and provides the signals necessary to drive the digital processor section. A correlator control circuit counts an exact number of 13.5 MHz reference clock cycles, and then supplies a start signal to a burst correlator circuit, which takes samples of a plurality of cycles of burst and correlates the results to determine the polarity of the burst samples. If they are of a first polarity, a count value of corresponding polarity is supplied. If they are of the opposite polarity, a count value of the corresponding opposite polarity is supplied. The sequence of the polarities of the final counts are detected to identify the color field 1 for the standard being used.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: November 13, 1990
    Assignee: Ampex Corporation
    Inventor: David C. O'Gwynn
  • Patent number: 4967278
    Abstract: A video camera comprising an optical-to-video conversion means having a longitudinal optical axis, a viewfinder cooperating with the conversion means, and means for detecting and indicating the transverse tilt of the camera in one of a plurality of successive angular increments. The tilt indicator includes means, such as a plurality of light-emitting diodes in an ordered array viewable in the viewfinder and operative to indicate visually the transverse tilt of the camera.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: October 30, 1990
    Inventor: Steve Greenbaum
  • Patent number: 4965671
    Abstract: In the construction of the sensor as a frame transfer sensor (FT) a control circuit therefor may not only be utilized for the information transfer and the electronic shutter, but also for a third purpose, namely for a reduction of the smear before integration. Starting from the control circuit for an information frame transfer (.phi..sub.A, TG, .phi..sub.B), a parallel information shift (.phi..sub.B, TG) and a serial information shift (.phi..sub.C) at the sensor and the electronic shutter (ESPS, BUF, MF, .phi..sub.A) at a pick-up member (PP) of the sensor (FT), the smear reduction is obtained by the use of a pulse generator (JC, FF, AN,I) at the electronic shutter, which generator is adapted to supply a series of reset pulses (ESPS) with a minimum number. A minimum number of two line-frequency pulses occurring in line blanking periods has been given as an example.
    Type: Grant
    Filed: June 9, 1988
    Date of Patent: October 23, 1990
    Assignee: U.S. Philips Corp.
    Inventor: Pieter B. Dielhof
  • Patent number: 4963980
    Abstract: An image sensing device is provided with a switching circuit for a selection between a field reading mode and a frame reading mode in reading signals formed at picture elements of an image sensor; and an overflow control circuit for controlling and changing the overflow level of each of the picture elements from one level over to another in response to the selecting action of the switching circuit. The device is arranged to store, at an EEPROM, data relative to the overflow levels of each of the picture elements differently set for the field and frame reading modes.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: October 16, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Suga, Kan Takaiwa
  • Patent number: 4962417
    Abstract: In a color television receiver having first and second chroma amplifiers, a chroma overload detector uses a differential amplifier for peak detection of a chrominance signal over a predetermined threshold level, and in response thereto, for generating a control signal and applying it to the second chroma amplifier to control the gain of the amplifier.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: October 9, 1990
    Assignee: RCA Licensing Corporation
    Inventor: Mark A. Schultz
  • Patent number: 4959725
    Abstract: A method and apparatus for processing a raw video camera signal to identify undesired multidimensional video image motion caused by rotational or translational camera motion in two or three dimensions, and to generate a corrected video camera signal in which such undesired video image motion is reduced. In a preferred embodiment, the apparatus includes a video camera having an oversized image pickup device, four accelerometers mounted in the video camera, and means for processing the accelerometer output signals and the raw video camera output signal to generate a corrected video camera signal. The processing means preferably employs selective clocking to generate a corrected video signal representing a stabilized version of the view of interest. Such a corrected video signal will exclude extraneous visual information (i.e., visual information other than the view of interest), and will be "stabilized" in the sense that it exhibits less image motion than does the draw video camera signal.
    Type: Grant
    Filed: July 13, 1988
    Date of Patent: September 25, 1990
    Assignee: Sony Corporation
    Inventor: Gary Mandle
  • Patent number: 4958217
    Abstract: An image processing apparatus capable of extracting a particular image area from an image by designating a color hue of the desired particular image area. After indication on one or more points in an object region of interest, an initial range of hue or of brightness is designated, and a predetermined color is painted throughout a region adjacent to the indicated point(s) and having a hue or brightness, respectively, within the predetermined range. If that process results in the coloring of an area exceeding that which the operator desires to cover, the predetermined range of hue or brightness, as the case may be, is narrowed, and the process is repeated.
    Type: Grant
    Filed: July 27, 1989
    Date of Patent: September 18, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Kimura, Takeshi Kobayashi, Makoto Katsuma, Kazunobu Urushihara, Susumu Matsumura, Hiroshi Ohmura
  • Patent number: 4956702
    Abstract: An apparatus for producing a full color image including a photosensitive element having three silver halide emulsion layers, at least two of which are sensitized to radiation in the infrared region of the electromagnetic region, and three laser diodes for exposing the photosensitive element. The three silver halide emulsion layers are differentiated from each other by photographic speed, filter layers between the emulsion layers or a combination of both speed differences and filter layers.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: September 11, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John M. McQuade, Richard L. Paidosh
  • Patent number: 4954889
    Abstract: A color masking circuit and a color printer incorporating the color masking circuit which performs color masking processing upon color density data to indicate the density of the color picture elements. The color masking circuit includes a matrix coefficient table for holding predetermined matrix coefficients which are used in the masking of the inputted color density data. A matrix coefficient selector selects predetermined matrix coefficients from the matrix coefficient table according to the color density data correction to be performed. Multiplication and adder circuits are also provided for calculating the corrected color density data in accordance with the selected matrix coefficients. However, the matrix coefficients may be taken directly from a look-up table by addressing the table with the color density data to be corrected.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: September 4, 1990
    Assignee: NEC Home Electronics Ltd.
    Inventors: Kunio Endo, Tadashi Katsukawa
  • Patent number: 4954887
    Abstract: An image scanner optically scans an original to obtain color signals of different colors. A color converter converts the color signals of different colors into image formation signals of different colors. An input unit such as a ten-key pad on an operation panel or the like is used to enter control information such as a date or a control number in advance. An image forming unit performs image formation on an image forming medium by using a single-color image transfer medium in accordance with one of the image formation signals of different colors and the input control information.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: September 4, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kenichi Ono
  • Patent number: 4953028
    Abstract: An image sensor comprising MOS-type solid-state image pickup elements for transferring signals produced in photosensing elements to signal read-out lines through MOS-type switches. The image sensor is equipped with capacitance addition means comprising MOS-type switches and capacitance elements, whereby an additive capacitance is selectively connected to each signal read-out line.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: August 28, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Jin Murayama, Yoshimitsu Kudoh
  • Patent number: 4953029
    Abstract: A still carmera system is capable of being loaded with a film back or a still video back selectably or of changing focal length information of an objective lens in use so as to correspond to the image size of the still video back, whereby when loaded with the still video back, the operational condition of a focal length dependent portion is set in accordance with changed focal length information.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: August 28, 1990
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Yasuhiro Morimoto, Mitsuru Saito, Tadahiro Yoshida, Nobuyuki Taniguchi
  • Patent number: 4951130
    Abstract: There is provided an improvement on a solid-state type color image sensor having a color filter arrangement matching the line sequential color difference signal method. A color filter selected from magenta, yellow and cyan for covering the entire area of each picture cell and a color filter of a different color are superposed one upon the other. The color filters covering predetermined ratios of the areas of associated picture cells are preferably formed collectively in a stripe shape.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: August 21, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuo Iizuka, Hirokazu Ichikawa
  • Patent number: 4949182
    Abstract: A CCD sensor for use in telecine equipment has at least one transport register into which at least some of the sensor photosites discharge. A plurality of detectors are coupled to the transport register. Successive charge packets from the register are passed selectively to respective ones of the plurality of detectors in turn.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: August 14, 1990
    Assignee: Rank Cintel Limited
    Inventor: Ronald W. J. Mumford
  • Patent number: 4945406
    Abstract: Apparatus and accompanying methods for use in a film to video transfer system for achieving automatic color balancing of color images for subsequent display on a color monitor. Specifically, this apparatus first transforms each pixel in an image to be transferred from logarithmic exposure ("log exposure") RGB color values into corresponding printing density values through local averaging, then utilizes a printing density based color correction method to generate a color correction offset value for each of the RGB primary colors, and finally converts the three resulting RGB color correction offset values from the printing density domain back to the log exposure domain wherein each offset value is subsequently used to correct the corresponding red, green and blue color values associated with each of the pixels that collectively forms a subsequent scan of the same image prior to the conversion of each of the color balanced RGB pixel values into analog video form.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: July 31, 1990
    Assignee: Eastman Kodak Company
    Inventor: David R. Cok
  • Patent number: 4943850
    Abstract: A digital video color camera having three solid-state image sensing devices and an analog-to-digital converter that converts the signal from the image sensing devices to a digital signal and a digital signal processing circuit that processes the output of the analog-to-digital converter further includes a clock generator that generates a first sampling clock signal used to drive the solid-state image sensing devices and a second clock signal having a frequency (f2) that is higher than the first frequency (f1) used to drive the digital signal processing circuit. An optical low-pass filter and an electrical low-pass filter are provided between the image sensing devices and the analog-to-digital converter in one embodiment, and in another embodiment the electrical low-pass filter is after the analog-to-digital converter. The optical low-pass filter has a frequency characteristic chosen to depress the frequency band component between the frequencies f1-1/2f2 and f1.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: July 24, 1990
    Assignee: Sony Corporation
    Inventor: Takashi Asaida