Method and arrangement for FPN correction in an image signal from an image sensor

US7224848B2 · kind B2 · utility

Assignee

• Institut für Mikroelektronik Stuttgart · DE

Inventors

• Bernd Hofflinger · Sindelfingen, DE
• Markus Strobel · Hersbruck, DE

Key dates

• Filing date: Oct 5, 2004
• Grant date: May 29, 2007
• Expiry date: May 31, 2025

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N25/67
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

In order to correct for fixed pattern noise in the signals of an image sensor, image signal values are read out from the pixels of the sensor. Individual correction values are added as analogue quantities to the image signal values via a signal path having a defined transfer function. Parameters which are characteristic of the defined transfer function are provided in a memory and the individual correction values are calculated in a correction value calculating unit using the parameters provided.