Patent ID: 9235882
Filing Date: 2016-01-12
CPC Classification: G06T,H04N

Claim Text:
1. A method for detecting a dust spot in a digital image having a plurality of pixels, the method comprising the steps of: determining an expected dust spot configuration of the dust spot in the image; applying a statistic order filter to a color space channel for each of the plurality of pixels in the digital image to generate a filtered value for each of the plurality of pixels, the filtered value being an nth lowest actual color space within a filter window that encircles the expected dust spot configuration, wherein n is a parameter of the statistic order filter that is based on the number of pixels in the expected dust spot configuration so that the filtered value is based at least partially upon the expected dust spot configuration; and comparing the filtered value to an actual color space value of each of the plurality of pixels to generate a binary image of the digital image.