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:
Sep. 23, 2014
Filed:
Oct. 26, 2010
Mark Robertson, Cupertino, CA (US);
Ming-chang Liu, San Jose, CA (US);
Yoshihiro Murakami, Atsugi, JP;
Toru Kurata, Ageo, JP;
Yutaka Yoneda, Yokohama, JP;
Mark Robertson, Cupertino, CA (US);
Ming-Chang Liu, San Jose, CA (US);
Yoshihiro Murakami, Atsugi, JP;
Toru Kurata, Ageo, JP;
Yutaka Yoneda, Yokohama, JP;
Sony Corporation, Tokyo, JP;
Abstract
Phase correlation is an established method for computing motion which relies on the ability to find peaks in a computed phase correlation surface. Two methods to improve the ability to detect peaks in the phase correlation surface are described herein. The first method applies a theoretically-derived and spatially-varying gain to the phase correlation surface. The gain compensates for peaks whose amplitudes have been decreased due to windowing effects; such effects are unavoidable in phase correlation. The second method uses concepts from matched filters to improve detection of peaks whose amplitudes are diminished due to a spreading of the peak energy into surrounding positions in the phase correlation surface. Peak detection filters allow such low-amplitude peaks to be properly detected. It is possible to use only the first method, or only the second method or both methods combined.