Background thermal compensation by filtering (BTCF) for infrared thermography evaluation

Author

Restrepo-Giron, Andres D. ; Loaiza-Correa, Humberto

Author_Institution

Escuela de Ing. Electr. y Electron. (EIEE), Univ. del Valle Cali, Cali, Colombia

fYear

2014

fDate

17-19 Sept. 2014

Firstpage

1

Lastpage

5

Abstract

A new contrast enhancement technique is presented for application in active thermography inspection, based on a decimated version of median filtering to decouple the background thermal information from defective areas, without depending on any heat propagation model or the a priori selection of a healthy region. Results over inspected carbon fiber reinforced plastic (CFRP) slabs show that BTCF can reduce in 70% the residuary non-uniformity heating, and after truncation of negative contrast values, it can be obtained an improvement up to 11dB in SNR with respect to original sequences.

Keywords

carbon fibre reinforced plastics; compensation; infrared imaging; inspection; median filters; BTCF; CFRP; background thermal compensation by filtering; background thermal information; carbon fiber reinforced plastic; contrast enhancement technique; heat propagation model; infrared thermography evaluation; median filtering; negative contrast value; residuary nonuniformity heating; slab; thermography inspection; Filtering; Heating; Inspection; Kernel; Materials; Signal to noise ratio; Slabs; Infrared thermography; median filtering; nonuniform heating; thermal contrast; un-sharp masking;

fLanguage

English

Publisher

ieee

Conference_Titel

Image, Signal Processing and Artificial Vision (STSIVA), 2014 XIX Symposium on

Conference_Location

Armenia

Type

conf

DOI

10.1109/STSIVA.2014.7010162

Filename

7010162