Patent · US Expired

Feature-free registration of dissimilar images using a robust similarity metric

US6268611A · kind A · utility

189Cited by

5References

25Claims

0Family size

Assignee

CellaVision AB · SE

Inventors

Magnus Pettersson · Gately Drive, SE
Anders Rosenqvist · Lund, SE
Anders Heyden · Dalby, SE
Martin Almers · Lund, SE

Key dates

Filing date	Dec 16, 1998
Grant date	Jul 31, 2001
Priority date	—
Expiry date	Dec 16, 2018

Classification

Technology area (CPC G)Physics
CPC primaryG06T3/403
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An image registration (alignment) system which achieves alignment by determining an optimal focus for a composite image produced from the combination of misregistered images. The system also uses optimal or nearly optimal linear filters for filtering the combined image to emphasize (enhance) alignment information in the combined image and to de-emphasize (damp) noise. One set of the nearly optimal linear filters are modified second order difference filters in which the number of internal zeros are modified to tune the filter to the particular equipment.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.