Back to results
US 9,002,112 B2Granted
Video alignment system
AssigneeTrimble Navigation Limited
InventorPeter G France
Life of this patent
Estimating the term…
Abstract
A video alignment system is described in which the location of a modulated spot in a video scene is estimated with correlation techniques including tracking multiple camera phase shift candidates and normalizing correlation sums with a voting system.
Claims20
A video alignment system comprising:
- a light source for illuminating a spot in a scene, the light source being modulated according to a pseudorandom noise code having a corresponding correlator function;
- a video camera that captures digital images of the scene;
- and,
- a processor that:
- receives digital image data from the video camera, correlates image pixel intensities with the correlator function, normalizes correlation results with a voting system, and identifies a pixel in the digital images as a location of the spot on the basis of pixel vote totals.
2 more elements
A video alignment method comprising:
- illuminating a spot in a scene with a light source, the light source being modulated according to a pseudorandom noise code having a corresponding correlator function;
- capturing digital images of the scene with a video camera;
- a processor receiving digital image data from the video camera;
- and,
- the processor:
- tracking correlation sums that are sums of products of video pixel intensities and correlator function values, normalizing the correlation sums to +1 vote for positive sums and −1 vote for negative sums, and identifying a pixel in the digital images as a location of the spot on the basis of pixel vote totals.
3 more elements
Dependencies are inferred from the claim text.