Reversible compression of industrial radiographs using multiresolution decorrelation
Keshi Chen, Tenkasi V. Ramabadran · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1991
An improved method for the reversible compression of industrial radiographs is described. The method uses one of the multiresolution decorrelation techniques, viz., hierarchical interpolation (HINT), to decorrelate a given image. However, instead of encoding the decorrelated image pixels at each resolution level using a memoryless source as in the traditional HINT method, a statistical source model with multiple contexts is employed and the pixels are encoded using the appropriate contextual statistics. Experiments on industrial x-ray images show that the improved method achieves about 19% more compression on the average than the traditional method.