Method for correcting the intensity of an image

US6215911A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Georg Goertler · Baiersdorf, DE
• Guenter Schnur · Hemhofen, DE

Key dates

• Filing date: Dec 12, 1997
• Grant date: Apr 10, 2001
• Expiry date: Dec 12, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/20056
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In an image acquisition method in which there is a sensitivity characteristic over the image space that is non-uniform but that changes only slowly, this characteristic is determined according to the steps of, in the original image, intensity changes are limited to a predetermined maximum value, a low-pass filtering is applied to the auxiliary image acquired in this way, and the sensitivity characteristic of the image acquisition method over the image space is acquired from the low-pass-filtered auxiliary image.