Image processing apparatus, image processing method, and program
US7876369B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 2007 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Mar 18, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/68
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an image processing apparatus, a defect detection unit detects a defective pixel and a defect level thereof by comparing a maximum pixel value detected at each pixel position of a plurality of images captured via an image taking operation performed a plurality of times by an image sensor with a threshold value for detecting white defective pixels, and/or by comparing a minimum pixel value detected at each pixel position of the plurality of images with a threshold value for detecting black defective pixels. A defective pixel selection unit selects a predetermined plurality of defective pixels with high defect degrees, and registers defect data associated with the predetermined plurality of selected defective pixels in the defect data table. A defect correction unit corrects pixel values of pixels of the image output from the image sensor, in accordance with the defect data registered in the defect data table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.