The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 06, 2019
Filed:
May. 05, 2017
Digimarc Corporation, Beaverton, OR (US);
Vojtech Holub, Portland, OR (US);
Tomas Filler, Beaverton, OR (US);
Brett A. Bradley, Portland, OR (US);
Digimarc Corporation, Beaverton, OR (US);
Abstract
An image processing method determines a geometric transform of a suspect image by efficiently evaluating a large number of geometric transform candidates in environments with limited processing resources. Processing resources are conserved by using configurations of dot product operations to produce both least squares mappings for each candidate and an error metric. Geometric transform candidates are rapidly winnowed to a smaller number of promising candidates based on the error metric and the promising candidates are refined further in subsequent iterations. An optimized method for determining updated coordinates for potential reference signal components in the suspect image evaluates a suspect image block at plural neighborhoods and builds a look up table that provides updated coordinates for each of the neighborhoods.