Combined forward and reverse correlation

Details Combined forward and reverse correlation Combined forward and reverse correlation

2006-06-01

2009-10-20

Bella, Matthew C (Department: 2624)

Image analysis

Pattern recognition

Template matching

C382S219000, C382S220000, C382S218000, C382S216000

Reexamination Certificate

active

07606424

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.

REFERENCES:
patent: 5537494 (1996-07-01), Toh
patent: 5734743 (1998-03-01), Matsugu et al.
patent: 6094501 (2000-07-01), Beatty
patent: 6301370 (2001-10-01), Steffens et al.
patent: 6784427 (2004-08-01), Grunewald et al.
patent: 6785427 (2004-08-01), Zhou
Rohaly, Janos et al., “Reverse Hierarchial PIV Processing”,Measurement Science and Technology13(7), (2002),984-996.
Davis, Quentin et al., “Statistics of subpixel registration algorithms based on spatiotemporal gradients or block matching”,Optical Engineering37(4), (Apr. 1998),1290-1298.
Westerweel, “Fundamentals of digital particle image velocimetry”,Measurement Science and Technology8, (1997),1379-1392.
Roesgen, T. “Optimal subpixel interpolation in particle image velocimetry”,Experiments in Fluids35(3), (Jun. 26, 2003),252-256.

Affiliated with

Also associated with

Rating

Combined forward and reverse correlation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Combined forward and reverse correlation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combined forward and reverse correlation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4141979