Patents by Inventor David K. Campbell

David K. Campbell 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).

  • Patent number: 10950003
    Abstract: A method and system are provided to calibrate multiple camera devices to perform multi-camera tracking of one or more objects. The method and system identifies one or more common (or matching) calibration points on both of a first image or video stream captured by a first camera device and a second image or video stream captured by a second camera. Each of the one or more common calibration points are in a field of view of the first and second camera devices. The method and system further determines coordinate information for the first and second camera devices from the one or more common calibration points, and evaluates the coordinate information to determine alignment parameters, which reflect a location and orientation of the second camera device relative to the first camera device.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: March 16, 2021
    Assignee: PELCO, INC.
    Inventors: David K. Campbell, Gregory V. Hofer, John M. Baron, Paula L. Beaty
  • Publication number: 20190304137
    Abstract: A method and system are provided to calibrate multiple camera devices to perform multi-camera tracking of one or more objects. The method and system identifies one or more common (or matching) calibration points on both of a first image or video stream captured by a first camera device and a second image or video stream captured by a second camera. Each of the one or more common calibration points are in a field of view of the first and second camera devices. The method and system further determines coordinate information for the first and second camera devices from the one or more common calibration points, and evaluates the coordinate information to determine alignment parameters, which reflect a location and orientation of the second camera device relative to the first camera device.
    Type: Application
    Filed: March 27, 2019
    Publication date: October 3, 2019
    Applicant: PELCO, Inc.
    Inventors: David K. CAMPBELL, Gregory V. HOFER, John M. BARON, Paula L. BEATY
  • Publication number: 20190306408
    Abstract: A method includes processing a video stream on at least one first camera device to identify actionable motion objects (AMOs). The at least one first camera device or computer system in communication therewith is caused to transmit metadata associated with the identified AMOs to at least one second camera device. A viewing area of the at least one second camera device is dynamically controlled in response to the metadata to enable the at least one second camera device to track and focus on at least one of the identified AMOs.
    Type: Application
    Filed: March 27, 2019
    Publication date: October 3, 2019
    Applicant: PELCO, Inc.
    Inventors: Gregory V. HOFER, David K. CAMPBELL, Kyminh LIANG
  • Patent number: 8792045
    Abstract: A method of refocusing a video surveillance camera includes performing a first focusing operation of a camera at a first time, sensing a first temperature of the camera at the first time, sensing a second temperature of the camera at a second time, determining if a change in temperature between the first temperature and the second temperature is greater than a predetermined temperature change, sensing a level of light in a field of view of the camera at the second time, determining if the level of light sensed in the field of view of the camera at the second time is within a predetermined light level range, determining if a period of time between the first time and second time is greater than a predetermined period of time, and performing a focus operation if the change in temperature between the first temperature and the second temperature is greater than the predetermined temperature change, the level of light sensed in the field of view of the camera at the second time is within the predetermined light lev
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: July 29, 2014
    Assignee: Pelco, Inc.
    Inventors: Matt Trumbo, David K. Campbell
  • Patent number: 8391698
    Abstract: Systems and methods for implementing Z-buffer generation in a camera are disclosed. In an exemplary embodiment the method may comprise exposing a plurality of pixels on an image capture device to a modulated light signal reflected from different regions of a scene adjacent a camera after different delays. The method may also comprise correlating intensity of the modulated light signal received by the image capture device for each the different delays to determine a flight time of the modulated light signal. The method may also comprise generating a Z-buffer corresponding to the different regions of the scene based on the correlation.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: March 5, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Richard Turley, Andrew C. Goris, David Branson, David R. Lawson, Donald J. Stavely, David K. Campbell
  • Patent number: 8063940
    Abstract: Image stabilization systems and methods are disclosed. One embodiment of the image stabilization method, among others, includes detecting motion of a camera, and responsive to the detected motion, changing an optical filter orientation to displace an image provided on a sensor.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: November 22, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Donald J. Stavely, Christopher A. Whitman, Gregory V. Hofer, David K. Campbell, Jason E. Yost
  • Patent number: 8045009
    Abstract: Image-exposure systems and methods are disclosed. One embodiment of the system includes a motion detecting device, and logic configured to determine when to terminate an image-exposure based on detected motion of a camera.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: October 25, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Donald J. Stavely, Christopher A. Whitman, Gregory V. Hofer, David K. Campbell, Jason E. Yost
  • Publication number: 20110080479
    Abstract: A method of refocusing a video surveillance camera includes performing a first focusing operation of a camera at a first time, sensing a first temperature of the camera at the first time, sensing a second temperature of the camera at a second time, determining if a change in temperature between the first temperature and the second temperature is greater than a predetermined temperature change, sensing a level of light in a field of view of the camera at the second time, determining if the level of light sensed in the field of view of the camera at the second time is within a predetermined light level range, determining if a period of time between the first time and second time is greater than a predetermined period of time, and performing a focus operation if the change in temperature between the first temperature and the second temperature is greater than the predetermined temperature change, the level of light sensed in the field of view of the camera at the second time is within the predetermined light lev
    Type: Application
    Filed: October 1, 2010
    Publication date: April 7, 2011
    Applicant: PELCO, INC.
    Inventors: MATT TRUMBO, DAVID K. CAMPBELL
  • Patent number: 7502057
    Abstract: Reducing or eliminated color-dependent vignetting in a digital camera includes: providing a raw array of data corresponding to an image of a scene for each color that the camera can image; and adjusting the raw arrays such that the array for each color exhibits substantially the same amount of vignetting.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: March 10, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Christopher A Whitman, Kevin J Matherson, Robert E Sobol, David K Campbell
  • Patent number: 7298414
    Abstract: Viewfinder apparatus, methods, and digital cameras that provide autofocus using retroreflected eye focus measurements. When a user looks at a part of a scene that is the intended subject of the image, his or her eye is correctly focused. The present invention measures the focus distance of the eye when the eye is focused on the desired location in the scene, and then uses the measured distance to set the focus of the camera.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: November 20, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Donald J. Stavely, David K. Campbell, Eric F. Aas, Gregory V. Hofer, Scott A. Woods, Dan L. Dalton, Kurt E. Spears
  • Patent number: 7265790
    Abstract: In an embodiment, a method sets an image capture device to one of a plurality of available operational modes for the image capture device. The method comprises determining an angle of pitch orientation of the image capture device, and setting the image capture device to the one of the plurality of operational modes if the angle of pitch orientation is within a predetermined angle range associated with the one of the plurality of operational modes.
    Type: Grant
    Filed: July 7, 2003
    Date of Patent: September 4, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Amy E. Battles, David K. Campbell
  • Patent number: 7262798
    Abstract: A digital camera simulates the use of fill flash. The camera takes a series of photographs of a scene at various focus distances. The photographs are stored, along with their corresponding focus distances. The photographs are analyzed to determine the distance to objects at various locations of the scene. Regions of a final photograph are selectively adjusted in brightness based on the distance information to simulate the effect that would have resulted had fill flash been used.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: August 28, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Donald J Stavely, K Douglas Gennetten, David K. Campbell, Paul M Hubel
  • Patent number: 7167201
    Abstract: Disclosed is an eye-start system that includes a light source adapted to be housed within a viewfinder of a device, and a light sensor also adapted to be housed within the device viewfinder, the light sensor being configured to sense light from the light source that reflects off of a user looking into the viewfinder. With this system, light reflected off of the user is sensed by the light sensor and, upon such an occurrence, a device action is activated.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: January 23, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Donald J. Stavely, Mark J. Bianchi, David K. Campbell, Amy E. Battles, Heather N. Bean
  • Patent number: 7084910
    Abstract: A digital image capture and processing system, comprising a lens coupled to a lens control element is disclosed. The image capture system includes an image sensor configured to capture images from the lens, and a memory element and a processor coupled to the lens control element. The memory element includes image capture software, where the image capture software causes the lens and the image sensor to capture at least two images, each of the at least two images captured using a varying parameter and stored as a single file where the at least two images are combined to form a new image having at least one characteristic different from corresponding characteristics of the at least two images.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: August 1, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Frederic C Amerson, Paul M. Hubel, Donald J Stavely, Charles H McConica, K Douglas Gennetten, Susan Hunter, David K. Campbell
  • Patent number: 7016604
    Abstract: Autofocus methods and digital cameras employing a holographic element or hologram. The holographic element generates one or more displaced images that are processed to generate a bipolar contrast signal that provides for improved autofocus performance of the digital camera.
    Type: Grant
    Filed: June 12, 2004
    Date of Patent: March 21, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Donald J. Stavely, David K. Campbell, Eric F. Aas, Gregory V. Hofer, Scott A. Woods, Dan L. Dalton, Kurt E. Spears
  • Patent number: 6993256
    Abstract: A focus lens and a zoom lens group having a first zoom lens and a second zoom lens are controlled separately from one another in an internal-focus camera. The positions of the focus lens and the second zoom lens in the zoom lens group are tracked, and are controlled to approach no closer to one another than a minimum safe distance to avert collisions between the focus lens and the second zoom lens.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: January 31, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Michelle Ogg, David K. Campbell, Gregory V Hofer, Masahiro Ohno, Yoshihiro Yamazaki
  • Patent number: 6812907
    Abstract: An electronic display comprises a plurality of independently operable segments. Each of the plurality of independently operable segments comprises a plurality of picture elements.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: November 2, 2004
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: K Douglas Gennetten, Charles H McConica, David K. Campbell, Donald J Stavely, Paul M Hubel
  • Publication number: 20040212711
    Abstract: Disclosed is an eye-start system that includes a light source adapted to be housed within a viewfinder of a device, and a light sensor also adapted to be housed within the device viewfinder, the light sensor being configured to sense light from the light source that reflects off of a user looking into the viewfinder. With this system, light reflected off of the user is sensed by the light sensor and, upon such an occurrence, a device action is activated.
    Type: Application
    Filed: April 28, 2003
    Publication date: October 28, 2004
    Inventors: Donald J. Stavely, Mark J. Bianchi, David K. Campbell, Amy E. Battles, Heather N. Bean
  • Publication number: 20040207653
    Abstract: Disclosed are systems and methods for controlling a display. In one embodiment, a system and a method pertain to monitoring the state of a computing device associated with the display, determining if pixel reduction is warranted in view of the monitoring, and, if pixel reduction is warranted, displaying a reduced-pixel, whole image that comprises fewer active pixels than an original, complete image previously presented in the display.
    Type: Application
    Filed: April 17, 2003
    Publication date: October 21, 2004
    Inventors: Donald J. Stavely, Mark J. Bianchi, David K. Campbell, Amy E. Battles, Heather Noel Bean
  • Publication number: 20040165099
    Abstract: Viewfinder apparatus, methods, and digital cameras that provide autofocus using retroreflected eye focus measurements. When a user looks at a part of a scene that is the intended subject of the image, his or her eye is correctly focused. The present invention measures the focus distance of the eye when the eye is focused on the desired location in the scene, and then uses the measured distance to set the focus of the camera.
    Type: Application
    Filed: January 29, 2003
    Publication date: August 26, 2004
    Inventors: Donald J. Stavely, David K. Campbell, Eric F. Aas, Gregory V. Hofer, Scott A. Woods, Dan L. Dalton, Kurt E. Spears