Method for interpolating a full color image from a single sensor using multiple threshold-based gradients
US6421084B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1998 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Mar 2, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/134
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital imaging system is provided for interpolating a full color image from a camera having an array of single color sensors. Measured color values are stored as an array of data elements in a memory of the system. Each data element corresponds to the measured color value from one sensor. A set of gradient values is determined for each data element at a specific location in the array. The gradient values correspond to color value differences in a plurality of directions from the data element. From the set of gradient values, a threshold value is determined. Using the threshold value, a subset of gradient values is selected so that the members of the subset have gradient values less than the threshold. Additional color values for each data element are interpolated according to the subset of gradient values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.