Method for detecting and correcting defective pixels in a digital image sensor
US7283164B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2002 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Nov 11, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A bad pixel correction (BPC) algorithm that can be implemented on the image sensor chip is provided for detecting and correcting defective pixels in a digital color image sensor. Gradients of neighboring pixels in at least one other color plane than the color plane of a current pixel and a range of sensor values from neighboring pixels in the same color plane as the current pixel are determined. If the sensor value of the current pixel is outside of the range by a threshold amount that is calculated using one or more of the gradients, the current pixel is determined to be a defective pixel, and replaced using the sensor values of the neighboring pixels in the same color plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.