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SYSTEM AND METHOD FOR FILTERING IMAGE NOISE

  • US 20070003158A1
  • Filed: 05/29/2006
  • Published: 01/04/2007
  • Est. Priority Date: 07/01/2005
  • Status: Active Grant
First Claim
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1. A system for filtering image noise, the system comprising:

  • an image acquiring module for acquiring an image;

    a gray-scale converter for converting gray-scale values of the image, and for sharpening the image;

    an intersecting point selecting module for defining axes perpendicular to image borders, for determining gray-scale values of axis points, for selecting intersecting points between the image borders and the axes, for creating an object points set, and for inputting the intersecting points into the object points set; and

    a noise filtering module for fitting a geometric character according to the object points set and defining a tolerance threshold value, for calculating a distance from each intersecting point in the object points set to the geometric character, for determining whether the distance is larger than the defined tolerance threshold value, and for marking the intersecting point as a noise and deleting the intersecting point if the distance is larger than the defined tolerance threshold value.

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