Maryland's Defense Patent Database

The defense community in Maryland is an R&D powerhouse.

Use this database to see the innovative patents that are poised for commercialization.

System and method for estimating velocity from image sequence with first order continuity

Patent image
NRL

A computer based method for estimating surface velocity based on a time series of at least two images of a same portion of the ocean surface by solving a heat equation having unknown parameters of heat source s and surface velocity components u and v. The images can be infrared or thermal images from the AVHRR or other images. Assign a pattern of sub-arrays with number of pixels in each sub-array sufficient to overdetermine the heat equation without the need to apply divergence and vorticity constraints. Define the heat equation for each interior pixel using bilinear interpolation at each interior based on solutions at the corner pixels. Use linear regression to solve for the unknown parameters u, v, and s for each corner pixel by minimizing total error of the heat equation in finite difference form at all pixels, and find the parameters at each remaining point with bilinear interpolation.

Inventors: 
Chen, Wei
Patent Number: 
Technical domain: 
Sensors and Measurement
FIle Date: 
2010-09-28
Grant Date: 
2013-08-13
Grant time: 
1,050 days
Grant time percentile rank: 
19
Claim count percentile rank: 
8
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY