Patents by Inventor Carver A. Mead

Carver A. Mead has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20160065862
    Abstract: Provided are systems and methods for image enhancement based on combining multiple related images, such as images of the same object taken from different imaging angles. This approach allows simulating images captured from longer distances using telephoto lenses. Initial images may be captured using a simple camera equipped with shorter focal length lenses, typically used on camera phones, tablets, and laptops. The initial images may be taken using a single camera. An object or, more specifically, a center line of the object is identified in each image. The object is typically present in the foreground portion of the initial images. The initial images may be cross-faded along the object center line to yield a combined image. Separating of the foreground and background portions of each image may be separated and separately processed, such as blurring the background portion and sharpening the foreground portion.
    Type: Application
    Filed: September 21, 2015
    Publication date: March 3, 2016
    Inventors: Lloyd Watts, Carver Mead
  • Patent number: 9142010
    Abstract: Provided are systems and methods for image enhancement based on combining multiple related images, such as images of the same object taken from different imaging angles. This approach allows simulating images captured from longer distances using telephoto lenses. Initial images may be captured using simple cameras equipped with shorter focal length lenses, typically used on camera phones, tablets, and laptops. The initial images may be taken using two different cameras positioned a certain distance from each other. An object or, more specifically, a center line of the object is identified in each image. The object is typically present in the foreground portion of the initial images. The initial images may be cross-faded along the object center line to yield a combined image. Separating of the foreground and background portions of each image may be separated and separately processed, such as blurring the background portion and sharpening the foreground portion.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: September 22, 2015
    Assignee: Audience, Inc.
    Inventors: Lloyd Watts, Carver Mead
  • Publication number: 20130169844
    Abstract: Provided are systems and methods for image enhancement based on combining multiple related images, such as images of the same object taken from different imaging angles. This approach allows simulating images captured from longer distances using telephoto lenses. Initial images may be captured using simple cameras equipped with shorter focal length lenses, typically used on camera phones, tablets, and laptops. The initial images may be taken using two different cameras positioned a certain distance from each other. An object or, more specifically, a center line of the object is identified in each image. The object is typically present in the foreground portion of the initial images. The initial images may be cross-faded along the object center line to yield a combined image. Separating of the foreground and background portions of each image may be separated and separately processed, such as blurring the background portion and sharpening the foreground portion.
    Type: Application
    Filed: January 10, 2013
    Publication date: July 4, 2013
    Inventors: Lloyd Watts, Carver Mead
  • Patent number: 8076707
    Abstract: A semiconductor device is provided that uses a floating gate to store analog- and digital-valued information for periods of time measured in milliseconds to hours. Charge is added to and/or removed from the floating gate by means of direct electron tunneling through the surrounding insulator, with the insulator typically being thin enough such that appreciable tunneling occurs with an insulator voltage smaller than the difference in electron affinities between the semiconductor and the insulator and/or between the floating gate and the insulator. The stored information is refreshed or updated as needed. In many applications, the stored information can be refreshed without interrupting normal circuit operation. Adding and removing charge to or from the floating gate may be performed using separate circuit inputs, to tailor the performance and response of the floating-gate device. There is no need to use a control gate in the floating-gate structures disclosed herein.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: December 13, 2011
    Assignee: Synopsys, Inc.
    Inventors: John D. Hyde, Todd E. Humes, Christopher J. Diorio, Carver A. Mead
  • Patent number: 6934050
    Abstract: A method for storing a full Red, Green, Blue (RGB) data set. A full RGB data set is three-color image data captured with an imager array formed on a semiconductor substrate and comprising a plurality of vertical-color-filter detector groups. Each of the vertical color detector groups comprises three detector layers each configured to collect photo-generated carriers of a first polarity, separated by intervening reference layers configured to collect and conduct away photo-generated carriers of opposite polarity, the three detector layers being disposed substantially in vertical alignment with respect to one another and having different spectral sensitivities. The three-color image data is then stored as digital data in a digital storage device without performing interpolation on the three-color image data.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: August 23, 2005
    Assignee: Foveon, Inc.
    Inventors: Richard B. Merrill, Richard F. Lyon, Carver A. Mead
  • Patent number: 6853404
    Abstract: An electronic view camera integrates a camera head assembly and laptop computer into a tripod mountable unified structure. The rigid frame, that unifies the camera head and computer, accommodates a choice of laptop type computers from a variety of different manufacturers. The open front, back and side design of the rigid frame permits ready access for electrical connections and for access to removable storage devices, keyboard, and pointing device. The computer LCD acts as a large screen viewfinder for the camera and has the “feel” of a professional type view camera rather than the “feel” of a computer system with a photographic peripheral.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: February 8, 2005
    Assignee: Foveon, Inc.
    Inventors: Carver A. Mead, Jeffrey O. Pritchard, Richard F. Lyon, Peter O. Schmidt
  • Patent number: 6833871
    Abstract: A method for controlling the exposure of an active pixel array electronic still camera includes the steps of: integrating photocurrent in each pixel during an integration time period; collecting overflow charge from all pixels in the array during the integration time period; developing an overflow signal as a function of the overflow charge; and terminating the integration time period when the overflow signal exceeds a preset threshold level selected to represent a desired reference exposure level.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: December 21, 2004
    Assignee: Foveon, Inc.
    Inventors: Richard B. Merrill, Carver A. Mead, Richard F. Lyon
  • Patent number: 6794627
    Abstract: An image sensor includes a plurality of active pixel sensors arranged in an array. Each active pixel sensor includes a photosensor that generates a sensor signal nominally indicative of an intensity of light incident on the photosensor and a follower-type amplifier that couples the sensor signal to an output of the active pixel sensor to provide a buffered sensor signal. A column line is provided for each column in the array, and each column line is coupled to the output of the active pixel sensors associated with that column.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: September 21, 2004
    Assignee: Foveon, Inc.
    Inventors: Richard F. Lyon, Robert S. Hannebauer, Richard M. Turner, Carver A. Mead
  • Patent number: 6741283
    Abstract: A storage pixel sensor disposed on a semiconductor substrate comprises a capacitive storage element having a first terminal connected to a fixed potential and a second terminal. A photodiode has an anode connected to a first potential and a cathode. A semiconductor reset switch has a first terminal connected to the cathode and a second terminal connected to a reset potential. A semiconductor transfer switch has a first terminal connected to the cathode and a second terminal connected to the second terminal of the capacitive storage element. A semiconductor amplifier has an input connected to the capacitive storage element and an output. The semiconductor reset switch and the semiconductor transfer switch each have a control element connected to a control circuit for selectively activating the semiconductor reset switch and the semiconductor transfer switch.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: May 25, 2004
    Assignee: Foveon, Inc.
    Inventors: Richard B. Merrill, Richard M. Turner, Carver A. Mead, Richard F. Lyon
  • Patent number: 6731397
    Abstract: A method for storing digital information from an image sensor comprises the steps of providing an image sensor producing three-color output data at each of a plurality of pixel locations; providing a digital storage device coupled to the image sensor; sensing three-color digital output data from the image sensor; and storing said three-color output data as digital data in the digital storage device without performing any interpolation on the three-color output data. The data may be compressed prior to storage and expanded after retrieval from storage. In a preferred embodiment, the image sensor comprises a triple-junction active pixel sensor array.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: May 4, 2004
    Assignee: Foveon, Inc.
    Inventors: Richard B. Merrill, Richard F. Lyon, Carver A. Mead
  • Publication number: 20040021166
    Abstract: A semiconductor device is provided that uses a floating gate to store analog- and digital-valued information for periods of time measured in milliseconds to hours. Charge is added to and/or removed from the floating gate by means of direct electron tunneling through the surrounding insulator, with the insulator typically being thin enough such that appreciable tunneling occurs with an insulator voltage smaller than the difference in electron affinities between the semiconductor and the insulator and/or between the floating gate and the insulator. The stored information is refreshed or updated as needed. In many applications, the stored information can be refreshed without interrupting normal circuit operation. Adding and removing charge to or from the floating gate may be performed using separate circuit inputs, to tailor the performance and response of the floating-gate device. There is no need to use a control gate in the floating-gate structures disclosed herein.
    Type: Application
    Filed: January 31, 2003
    Publication date: February 5, 2004
    Applicant: Impinj, Inc., a Delaware Corporation
    Inventors: John D. Hyde, Todd E. Humes, Christopher J. Diorio, Carver A. Mead
  • Patent number: 6674247
    Abstract: Photographic flashes use the major portion of available energy in modern cameras. A series of innovations within a photographic flash system improves the energy efficiency by a factor of 3, and thereby extends battery life. The flash system includes a precise flash-termination circuit, a high-efficiency charging circuit, a low-leakage coupled inductor, and a battery-saving charge-circuit drive. Flash termination is controlled by a majority-carrier switching device. This circuit allows termination of the flash current without the timing uncertainty or parasitic leakage associated with previous designs. Multiple flashes also can be produced by the circuit, which may be interfaced with through-the-lens flash controls. A flyback-converter charging circuit uses a coupled inductor that has an alternately layered winding pattern to lower leakage inductance drastically, and uses appropriately selected wire types to decrease skin-effect resistance losses.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: January 6, 2004
    Assignee: Foveon, Inc.
    Inventors: Carver A. Mead, Glenn J. Keller
  • Patent number: 6646680
    Abstract: A focusing method and apparatus, for use with digital cameras having an electronic viewfinder with less display resolution than in the image generated by the camera's photocell array, uses a uniformly subsampled representation of the entire image for focusing, rather than displaying a selected portion of the higher resolution image. The focusing is assisted by the exaggerated discontinuities produced by subsampling. Introducing flicker enhances focusing sensitivity by repetitively displaying, on the electronic viewfinder, a prescribed set of different reduced-resolution images obtained by subsampling the same high-resolution image at different sampling locations. Each subsampled image of the set of reduced resolution images uses a different set of substantially uniformly distributed pixels.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: November 11, 2003
    Assignee: Foveon, Inc.
    Inventors: Carver A. Mead, Richard A. Lyon
  • Publication number: 20030164441
    Abstract: An image sensor includes a plurality of active pixel sensors arranged in an array. Each active pixel sensor includes a photosensor that generates a sensor signal nominally indicative of an intensity of light incident on the photosensor and a follower-type amplifier that couples the sensor signal to an output of the active pixel sensor to provide a buffered sensor signal. A column line is provided for each column in the array, and each column line is coupled to the output of the active pixel sensors associated with that column.
    Type: Application
    Filed: October 24, 2001
    Publication date: September 4, 2003
    Inventors: Richard F. Lyon, Robert S. Hannebauer, Richard M. Turner, Carver A. Mead
  • Patent number: 6614478
    Abstract: A method for attaching imagers to color-separation prisms includes the steps of: arranging three solid-state array image sensor integrated circuits behind and in close proximity to the output faces of a color-separating prism having substantially equal optical path lengths for the three paths, the three solid-state array image sensor integrated circuits each having a solid-state array image sensor and bonding pads for electrical connections disposed on a top face thereof; aligning the three sensors such that the images traversing the three paths are coincident within a pixel dimension of the image sensors; filling the space between each output face of the prism and the top face of the corresponding image sensor with index-matched adhesive; and causing the index-matched adhesive to become rigid while maintaining the alignment of the three image sensors.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: September 2, 2003
    Assignee: Foveon, Inc.
    Inventor: Carver A. Mead
  • Patent number: 6515702
    Abstract: An integrated CMOS semiconductor imaging device having two modes of operation that can be performed simultaneously to produce an output image and provide information of a brightest or darkest pixel in the image.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: February 4, 2003
    Assignee: California Institute of Technology
    Inventors: Orly Yadid-Pecht, Eric R. Fossum, Carver Mead
  • Publication number: 20020171881
    Abstract: A method for storing a full Red, Green, Blue (RGB) data set. A full RGB data set is three-color image data captured with an imager array formed on a semiconductor substrate and comprising a plurality of vertical-color-filter detector groups. Each of the vertical color detector groups comprises three detector layers each configured to collect photo-generated carriers of a first polarity, separated by intervening reference layers configured to collect and conduct away photo-generated carriers of opposite polarity, the three detector layers being disposed substantially in vertical alignment with respect to one another and having different spectral sensitivities. The three-color image data is then stored as digital data in a digital storage device without performing interpolation on the three-color image data.
    Type: Application
    Filed: March 4, 2002
    Publication date: November 21, 2002
    Applicant: Foveon, Inc., a California Corporation.
    Inventors: Richard B. Merrill, Richard F. Lyon, Carver A. Mead
  • Patent number: 6452633
    Abstract: A method for controlling the exposure of an active pixel array electronic still camera includes the steps of: integrating photocurrent in each pixel during an integration time period; collecting overflow charge from all pixels in the array during the integration time period; developing an overflow signal as a function of the overflow charge; and terminating the integration time period when the overflow signal exceeds a preset threshold level selected to represent a desired reference exposure level.
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: September 17, 2002
    Assignee: Foveon, Inc.
    Inventors: Richard B. Merrill, Carver A. Mead, Richard F. Lyon
  • Patent number: 6452835
    Abstract: A pMOS EEPROM cell includes a source, drain, channel, control gate and well contact. The device is a fully functional single element p-type floating gate MOSFET. A floating gate overlaps the well contact and completely surrounds the drain and source implants. The pMOS cell is written to by means of hot-electron injection, using an intrinsic feedback mechanism to write analog values. Hot electrons are generated in the channel by means of hole impact ionization at the transistor's drain. The pMOS cell is erased by Fowler-Nordheim tunneling. The tunneling voltage is applied only to the well to tunnel electrons from the floating gate. The well-source and well-drain junctions are protected from breakdown by means of guard rings.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: September 17, 2002
    Assignee: California Institute of Technology
    Inventors: Christopher J. Diorio, Carver A. Mead
  • Patent number: 6369853
    Abstract: A storage pixel sensor disposed on a semiconductor substrate comprises a capacitive storage element having a first terminal connected to a fixed potential and a second terminal. A photodiode has an anode connected to a first potential and a cathode. A semiconductor reset switch has a first terminal connected to the cathode and a second terminal connected to a reset potential. A semiconductor transfer switch has a first terminal connected to the cathode and a second terminal connected to the second terminal of the capacitive storage element. A semiconductor amplifier has an input connected to the capacitive storage element and an output. The semiconductor reset switch and the semiconductor transfer switch each have a control element connected to a control circuit for selectively activating the semiconductor reset switch and the semiconductor transfer switch.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: April 9, 2002
    Assignee: Foveon, Inc.
    Inventors: Richard B. Merrill, Richard M. Turner, Carver A. Mead, Richard F. Lyon