Title :
A hybrid lossless compression scheme using region-based predictive coding and integer wavelet transform
Author :
Lin, X.Y. ; Shark, L.K. ; Varley, M.R. ; Matuszewski, B.J.
Author_Institution :
Dept. of Eng. & Product Design, Univ. of Central Lancashire, Preston, UK
fDate :
6/23/1905 12:00:00 AM
Abstract :
This paper presents a hybrid scheme for lossless compression of the X-ray non-destructive testing (NDT) images of aircraft components. The method combines predictive coding and integer wavelet transform (IWT). Furthermore, with the aid of component CAD models to divide the X-ray images of aircraft components into different regions based on the material structures, the design of the predictors and the choice of the IWT are optimised according to the specific image features contained in each region having the same material structure. Using a real X-ray image of a practical aircraft component, the proposed hybrid scheme is presented and shown to offer a significantly higher compression ratio than other lossless compression schemes
Keywords :
X-ray imaging; data compression; entropy codes; image coding; linear predictive coding; nondestructive testing; transform coding; wavelet transforms; Entropy encoding; NDT; X-ray nondestructive testing; aircraft components; component CAD models; hybrid lossless compression scheme; image features; integer wavelet transform; predictive coding; Aerospace materials; Aircraft manufacture; Design automation; Design optimization; Image coding; Nondestructive testing; Predictive coding; Predictive models; Wavelet transforms; X-ray imaging;
Conference_Titel :
Image Processing, 2001. Proceedings. 2001 International Conference on
Conference_Location :
Thessaloniki
Print_ISBN :
0-7803-6725-1
DOI :
10.1109/ICIP.2001.958157
