Compression of thermographic images in welding engineering: a comparative study

Author

Strutz, Tilo ; Specht, Olaf ; Muller, Erika ; Wild, Walter

Author_Institution

Inst. of Telecommun. & Inf. Electron., Rostock Univ., Germany

fYear

2000

fDate

2000

Firstpage

233

Lastpage

238

Abstract

This contribution investigates different coding methods in application to the compression of thermographic images which were captured on-line for an off-line inspection of welding joints. On-line recording of images enables a complete quality checking. The standard coding algorithm JPEG (Joint Photographic Experts Group), a wavelet-based coding scheme and a DPCM-based (differential pulse code modulation) algorithm are compared with regard to the requirements of real-time applications and minimal loss of information

Keywords

automatic optical inspection; data compression; differential pulse code modulation; entropy codes; image coding; infrared imaging; quantisation (signal); wavelet transforms; welding; DPCM-based algorithm; JPEG standard coding algorithm; coding methods; complete quality checking; entropy coding; minimal loss of information; off-line inspection; quantization; real-time applications; reconstruction error; thermographic images compression; wavelet-based coding scheme; welding engineering; welding joints; Cooling; Image coding; Image reconstruction; Image storage; Inspection; Pulse modulation; Quantization; Transform coding; Wavelet transforms; Welding;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Instrument Engineering Proceedings, 2000. APEIE-2000. Volume 1. 2000 5th International Conference on Actual Problems of

Conference_Location

Novosibirsk

Print_ISBN

0-7803-5903-8

Type

conf

DOI

10.1109/APEIE.2000.913130

Filename

913130