×

Scene enhancements in off-center peripheral regions for nonlinear lens geometries

  • US 8,947,501 B2
  • Filed: 03/31/2011
  • Issued: 02/03/2015
  • Est. Priority Date: 03/31/2011
  • Status: Active Grant
First Claim
Patent Images

1. Within an image acquisition system comprising a non-linear, wide-angled lens and an imaging sensor, a method of enhancing a scene containing one or more off-center peripheral regions, the method comprising:

  • acquiring, using a nonlinear, wide-angled lens and an imaging sensor, an initial distorted image with a large field of view;

    generating a reconstructed image from the initial distorted image, wherein the reconstructed image includes a plurality of reconstructed regions;

    wherein each reconstructed region of the plurality of reconstructed regions has a corresponding region quality;

    wherein the region quality of each reconstructed region of the plurality of reconstructed regions is based on reconstruction factors of reconstructed pixels within the reconstructed region;

    wherein the reconstruction factor for a reconstructed pixel reflects how much data, from the image sensor, the reconstructed pixel was extrapolated based on;

    based on the region qualities of said plurality of reconstructed regions, determining one or more reduced quality regions within said plurality of reconstructed regions;

    determining whether any undetected faces below a size threshold are likely to exist in the one or more reduced quality regions; and

    in response to determining that any undetected faces below the size threshold are likely to exist in the one or more reduced quality regions, performing the steps of;

    generating one or more enhanced regions of interest that correspond to the one or more reduced quality regions; and

    applying face detecting or tracking, or both, to the one or more enhanced regions of interest to confirm presence of a face below the size threshold.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×