Michael E. Henderson
International Journal of Bifurcation and Chaos in Applied Sciences and Engineering
Transform coding at low bit rates introduces artifacts associated with the basis functions of the transform. For example, decompressed images based on the DCT (discrete cosine transform) - like JPEG - exhibit blocking artifacts at low bit rates. This paper proposes a post-processing scheme to enhance decompressed images that is potentially applicable in several situations. In particular, the method works remarkably well in `deblocking' of DCT compressed images. The method is non-linear, computationally efficient, and spatially adaptive - and has the distinct feature that it removes artifacts while yet retaining sharp features in the images. An important implication of this result is that images coded using the JPEG standard can be efficiently post-processed to give significantly improved visual quality in the images.
Michael E. Henderson
International Journal of Bifurcation and Chaos in Applied Sciences and Engineering
Martin C. Gutzwiller
Physica D: Nonlinear Phenomena
Zhihua Xiong, Yixin Xu, et al.
International Journal of Modelling, Identification and Control
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997