Sub-pixel accuracy and valid correlation signal detection by...

Details Sub-pixel accuracy and valid correlation signal detection by... Sub-pixel accuracy and valid correlation signal detection by...

2011-06-14

2011-06-14

Rahmjoo, Mike (Department: 2624)

Image analysis

Pattern recognition

Template matching

C382S216000, C382S218000, C382S219000, C382S220000, C382S107000, C382S124000, C382S141000, C382S278000, C382S302000, C340S005830

Reexamination Certificate

active

07961954

ABSTRACT:
Improved correlation techniques employ data from forward (template-to-reference) and reverse (reference-to-template) correlation to identify valid correlation peaks, enforce symmetry in correlation peaks, and/or combine forward and reverse correlation data. In embodiments, these techniques eliminate or reduce rms noise in a recovered signal peak location by enforcing correlation peak symmetry. The forward and reverse correlation methods described herein may be used for validation of correlation peaks, detection of outlier data points and improved interpolation, such as for higher accuracy localization of a peak center with sub-pixel resolution.

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