METHOD FOR DETECTING DEFECTIVE PIXEL VALUES

Abstract: a method for detecting defective pixel values determines an isotropic dispersion difference value by determining a ratio or difference between a pixel error and an isotropic dispersion, where the isotropic dispersion is a measure of how much pixel values in a set of neighbouring pixel values uniformly distributed around the pixel under consideration vary. the method compares the isotropic dispersion difference value to an isotropic threshold. a directional dispersion difference value is found by determining a ratio or difference between a pixel error and a directional dispersion, wherein the directional dispersion is a weighted measure of how much pixel values in a set of neighbouring pixel values around the pixel under consideration in a given direction vary. the directional dispersion difference value is compared to a directional threshold and it is determined that the pixel under consideration is defective based on at least one of the comparison results.

Inventor(s): Dumidu Sanjaya Talagala, David Hanwell, Nerhun Yildiz

CPC Classification: H04N25/68 (applied to defects)

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