×

Adaptive noise filter

  • US 9,747,676 B2
  • Filed: 03/21/2016
  • Issued: 08/29/2017
  • Est. Priority Date: 07/26/2013
  • Status: Active Grant
First Claim
Patent Images

1. A method for selecting a representative region of interest for an input image, the method comprising:

  • receiving an input image;

    dividing the input image into a plurality of regions;

    identifying one or more of the plurality of regions on which to perform a local analysis;

    performing the local analysis on each of the one or more identified regions; and

    selecting one of the one or more identified regions as a representative region based on results of the local analysis;

    wherein the selecting one of the one or more identified regions as the representative region comprises;

    for each of the one or more identified regions;

    fitting a Gaussian curve to a histogram of pixel intensity values of the region,determining whether a first percentage of all of the pixel intensity values in the region is accounted for in the histogram,determining whether a second percentage of all of the pixel intensity values in the region is below or within the Gaussian curve in the histogram,determining whether a third percentage of all of the pixel intensity values in the region is outside the Gaussian curve in the histogram;

    assigning a quality score to each of the one or more identified regions; and

    selecting one region as the representative region based on the quality scores.

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