Image demosaicing method
US6625305B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1999 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Aug 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/134
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for operating a data processing system to generate a second image from a first image having partially sampled color values at each pixel. The first image includes a two-dimensional array of pixel values, each of the pixel values corresponding to the light intensity in one of a plurality of spectral bands at a location in the first image. The second image includes a second two-dimensional array of color vectors. Each color vector has a light intensity value for each of the spectral bands. There is one such vector corresponding to each location having a pixel value in the first image. One component of the vector is equal to the pixel value in the first image at that location. The present invention computes the missing color components at each location. The method begins by providing an estimate for each component that is not equal to one of the pixel values from the first image for each vector. An updated estimate for each of the estimates is then generated by optimizing a weighted sum of first and second functions. The first function measures the degree of roughness of the second image, and the second function measures the degree to which the vectors change direction betwee…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.