Patents by Inventor Michael J. Zelman

Michael J. Zelman 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).

  • Automatic flicker frequency detection device and method
    Patent number: 7750949
    Abstract: An image device, such as a digital camera, detects specific repeating patterns of signal variations by processing columnar information from the device's two-dimensional sensor array used to generate images. In one embodiment, the columnar information is derived from calculating row averages for two image frames, with each row average being a computed average of the multiple signal intensities generated from some or all of the sensors within a particular row. After the columnar information is determined for each of the two frames, a difference signal is generated as a sequence of the differences between the row averages for the first frame and the row averages for the second frame. This row averaging and frame differencing removes a large percentage of the signal energy that is not a result of the artifact of interest, such as the flicker generated by illumination having intensity fluctuations at 100 Hz or at 120 Hz.
    Type: Grant
    Filed: January 13, 2007
    Date of Patent: July 6, 2010
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Dwight Poplin, Michael J. Zelman, Airell R. Clark, II, Todd S. Sachs
  • Automatic flicker frequency detection device and method
    Patent number: 7187405
    Abstract: An image device, such as a digital camera, detects specific repeating patterns of signal variations by processing columnar information from the device's two-dimensional sensor array used to generate images. In one embodiment, the columnar information is derived from calculating row averages for two image frames, with each row average being a computed average of the multiple signal intensities generated from some or all of the sensors within a particular row. After the columnar information is determined for each of the two frames, a difference signal is generated as a sequence of the differences between the row averages for the first frame and the row averages for the second frame. This row averaging and frame differencing removes a large percentage of the signal energy that is not a result of the artifact of interest, such as the flicker generated by illumination having intensity fluctuations at 100 Hz or at 120 Hz.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: March 6, 2007
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Dwight Poplin, Michael J. Zelman, Airell R. Clark, II, Todd S. Sachs
  • Automatic flicker frequency detection device and method
    Publication number: 20040201729
    Abstract: An image device, such as a digital camera, detects specific repeating patterns of signal variations by processing columnar information from the device's two-dimensional sensor array used to generate images. In one embodiment, the columnar information is derived from calculating row averages for two image frames, with each row average being a computed average of the multiple signal intensities generated from some or all of the sensors within a particular row. After the columnar information is determined for each of the two frames, a difference signal is generated as a sequence of the differences between the row averages for the first frame and the row averages for the second frame. This row averaging and frame differencing removes a large percentage of the signal energy that is not a result of the artifact of interest, such as the flicker generated by illumination having intensity fluctuations at 100 Hz or at 120 Hz.
    Type: Application
    Filed: October 2, 2001
    Publication date: October 14, 2004
    Inventors: Dwight Poplin, Michael J. Zelman, Airell R. Clark, Todd S. Sachs