US Patent 7,474,775
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
Disclosed is an automated method which can detect images containing red lesions. First, each image is preprocessed; next, candidate objects that may represent red-lesions are extracted; and in the final stage the probability for each candidate to represent a red-lesion is estimated using a classifier and a large set of specifically designed features.
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Abràmoff, Michael D; Van Ginneken, Bram; and Niemeijer, Meindert Automatic detection of red lesions in digital color fundus photographs. US Patent 7,474,775 filed March 29, 2006 and issued January 06, 2009. https://ir.uiowa.edu/patents/469