Patents by Inventor Gregory V Hofer

Gregory V Hofer 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
  • Patent number: 10893201
    Abstract: A method and system are provided to perform electronic image stabilization of images captured by an image sensor on a camera device. In the method and system, non-linear motion of a camera device is measured with a motion sensor during an exposure time for each line of a frame captured by the image sensor of the camera device. A first line of the frame has a first exposure time, and subsequent lines of the frame have an exposure time that is later than a previous line of the frame, each line of the frame having an associated position in the frame. The position of each line of the frame is adjusted based, at least in part, on the measured non-linear motion to create a modified frame that corrects for non-linear motion that occurred for each line of the frame.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: January 12, 2021
    Assignee: PELCO, INC.
    Inventor: Gregory V. Hofer
  • Publication number: 20200366824
    Abstract: A method and system are provided to perform electronic image stabilization of images captured by an image sensor on a camera device. In the method and system, non-linear motion of a camera device is measured with a motion sensor during an exposure time for each line of a frame captured by the image sensor of the camera device. A first line of the frame has a first exposure time, and subsequent lines of the frame have an exposure time that is later than a previous line of the frame, each line of the frame having an associated position in the frame. The position of each line of the frame is adjusted based, at least in part, on the measured non-linear motion to create a modified frame that corrects for non-linear motion that occurred for each line of the frame.
    Type: Application
    Filed: May 16, 2019
    Publication date: November 19, 2020
    Applicant: PELCO, Inc.
    Inventor: Gregory V. HOFER
  • 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: 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
  • Patent number: 7667765
    Abstract: The shutter of a digital imaging device may be calibrated by comparing a characteristic of two separate exposures obtained from a single field of the device's imaging sensor during a single exposure cycle. Calibrating the shutter in this manner facilitates the accuracy of even very short exposure times.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: February 23, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Richard Turley, Dan L. Dalton, Daniel M. Bloom, Gregory V. Hofer, Casey L. Miller, Scott A. Woods
  • Patent number: 7620304
    Abstract: A digital imaging device, such as a digital camera, minimizes shutter lag by determining some capture parameters, such as focus and exposure settings, before a user of the device has indicated that a photograph is to be taken. The parameters are updated when the device becomes substantially still before the indication that a photograph is to be taken.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: November 17, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Joel B. Larner, Gregory V. Hofer
  • Patent number: 7538794
    Abstract: A digital imaging device having a CCD sensor array with one or more fields captures both short and long exposures of a particular field during the capture of a single image frame. The short-exposure image data and the long-exposure image data from the particular field may be correlated to estimate motion within the image frame.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: May 26, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Richard Turley, Dan Dalton, Daniel Bloom, Gregory V. Hofer, Casey L. Miller, Scott Woods
  • Patent number: 7496291
    Abstract: A digital camera takes interleaved photographs of two different kinds. In one example embodiment, the first kind of photograph is taken using a first set of pixels of the camera's electronic array light sensor and has a short exposure time. The second kind of photograph is taken using a second set of pixels and has a long exposure time. More than one of the short-exposure-time photographs is taken while each long-exposure-time photograph is exposed. The two kinds of photographs are used for different purposes. For example, one kind may be used for performing automatic focusing while the other kind is used for displaying in a live view display. In this way, live view may continue while automatic focusing is performed. In another embodiment, one kind of photograph is used for providing a live view display, and the other is used in selecting exposure settings for a final photograph.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: February 24, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Daniel M. Bloom, Gregory V. Hofer, Jennifer J. Thayer, Mark John Bianchi, Jason E. Yost, Scott A. Woods, Oscar R Herrera E.
  • Patent number: 7466356
    Abstract: A digital imaging system that allows the user to select and mark objects with markers is disclosed. The digital imaging device tracks the position of the marked objects even when the marked objects are not in the field of view of the digital imaging system.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: December 16, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Gregory V. Hofer
  • Patent number: 7343047
    Abstract: A method comprises detecting edges in at least a region of a captured focus image, using adjacent pixels of the region to obtain first edge detection results and filtering the first edge detection results. The first filtering comprises comparing differences in pixel contrast in the first edge detection results with a first threshold value and removing the differences in pixel contrast that are less than the first threshold value from the first edge detection results. The method further comprises detecting edges in at least the region, using non-adjacent pixels of the region to obtain second edge detection results and filtering the second edge detection results. The second filtering comprising comparing differences in pixel contrast in the second edge detection results with a second threshold value and removing the differences in pixel contrast that are less than the second threshold value from the second edge detection results.
    Type: Grant
    Filed: September 22, 2004
    Date of Patent: March 11, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Eric F. Aas, Gregory V. Hofer, Casey L. Miller
  • Publication number: 20080044170
    Abstract: An image capturing system capable of providing an optimal exposure setting and method of operating the same are disclosed. The image capturing system includes a CMOS image sensor having photosensitive cells; a lens module having a mechanical shutter; a memory having a program for exposure analysis and a program for detecting motion stored therein; and a controller having a processor. The processor is configured to execute the program for exposure analysis and the program for detecting motion. The exposure analysis includes determining the exposure time for capturing an image of a scene based on the brightness of the scene and comparing the exposure time with the closing time of the mechanical shutter. The controller is operable to set the image capturing system to either a “Global-Reset mode” or an “Electronic-Rolling-Shutter” (ERS) mode based on the output of the exposure analysis and motion detection.
    Type: Application
    Filed: August 16, 2006
    Publication date: February 21, 2008
    Inventors: Choon Hwee Yap, Gregory V. Hofer
  • Patent number: 7304681
    Abstract: A digital imaging device performs automatic focus and exposure adjustments based on high-resolution frames when a scene change has been detected based on the analysis of low-resolution frames. The digital imaging device reduces battery power consumption while simultaneously shortening shutter lag.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: December 4, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Joel B. Larner, Gregory V. Hofer
  • 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: 7289151
    Abstract: In one embodiment there is shown a method for capturing data, the method comprising sensing a first signal, capturing an auto exposure (AE) image in response to a sensed first signal, the auto exposure image captured with settings based upon preestablished criterion, and upon the AE image being captured, determining if a second signal has been sensed, and if the second signal has been sensed, capturing a speculative full exposure image, and if the captured speculative full exposure is determined to be acceptable, reading the remainder of the captured speculative image.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: October 30, 2007
    Assignee: Hewlett-Packard Develoment Company, L.P.
    Inventors: Donald J. Stavely, James H. Anderson, Gregory V. Hofer, Scott A. Woods, James S. Voss
  • Patent number: 7116364
    Abstract: A digital camera maintains a consistent effective focal length upon switching from a first focus mode to a second focus mode, the focus modes having different maximum focal lengths. Maintaining a consistent effective focal length across focus mode changes obviates the need for a user to reframe a scene upon changing focus modes.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: October 3, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Amy E. Battles, Jason E. Yost, Gregory V. Hofer
  • Patent number: 7027728
    Abstract: A camera includes software to compute a measure of focus at a plurality of focal distances. The camera includes an indicator of the measure of focus as a function of focal distance. The camera may also include an indication of present focal position. The camera may also include an indication of present depth of field.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: April 11, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Andrew C. Goris, Jason E. Yost, Gregory V. Hofer
  • 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