The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 2000
Filed:
Apr. 16, 1998
Rainer Breiter, Heilbronn, DE;
Wolfgang Cabanski, Heilbronn, DE;
AEG Infrarot-Module GmbH, Heilbronn, DE;
Abstract
The invention concerns a process to correct the intensity of images from a digital infrared camera with a two-dimensional detector. First a stationary correction is made at a reference source to determine correction coefficients. For the stationary correction, an average intensity characteristic curve U.sub.av (T) is determined for the detector and compared with the intensity characteristic curve U.sub.j (T) for each image point j of the two-dimensional detector to determine correction coefficients for each image point j. A non-linear formulation is used to adapt the intensity characteristic curve U.sub.j (T) of each image point to the average intensity characteristic curve U.sub.av (T). Correction coefficients are stored in a memory to correct the individual intensity U.sub.j of each image point j during operation. During operation, the correction coefficients are improved dynamically. The intensity Uj of an image is recorded and the intensity Uj of the image is filtered by a locally acting adaptive filter. Then the remaining imaging error is determined using intensity Uj of the unfiltered image and intensity F(Uj) of the filtered image and the correction coefficients are improved using the ascertained remaining imaging error.