Tonal balancing of multiple images
US7317844B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2007 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | May 24, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30181
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method for tonally balancing a image mosaic includes supplying the image mosaic which has multiple overlap regions; identifying in the overlap regions a set of corresponding points that correspond to a single location and are indicative of a tonal variation; establishing a tonal variation threshold; eliminating from the overlap regions a subset of corresponding points, the subset having tonal variation deviating from the tonal variation threshold; repeating the eliminating until substantially all subsets have been eliminated, producing adjusted overlap regions that include a set of remaining corresponding points; obtaining gains and biases for each spectral band in the adjusted overlap regions; applying the gains and biases to transform intensities of the set of remaining corresponding points, producing transformed corresponding points; and producing a tonally balanced image mosaic using the transformed corresponding points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.