Title :
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
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;
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
DOI :
10.1109/APEIE.2000.913130
