Tonal balancing of multiple images
US7236646B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 2003 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Aug 2, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30181
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods are disclosed for tonally balancing multiple images. In one embodiment, the method comprises using a subset of corresponding points in each of a plurality of image overlap regions to solve a set of minimization equations for gains and biases for each spectral band of each image, the corresponding points being points from different images having locations that correspond to each other, the subset of corresponding points consisting of corresponding points whose intensities differ less than a threshold, applying the gains and biases to the images, and iterating said using and applying actions for a predetermined number of iterations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.