| Conference |
| Type of Publication |
| Empirical Evaluation of Boundary Policies for
Wavelet-based Image Coding |
| Title |
|
| Authors |
| Proc. Second International Conference on Wavelet
Analysis and Its Applications, pp.
4-15, Hong Kong, China, December 2001 |
| Published in |
| The wavelet transform has become the most
interesting new algorithm for still image compression. Yet there
are many parameters within a wavelet analysis and synthesis which
govern the quality of a decoded image. In this paper, we discuss
different image boundary policies and their implications for the
decoded image. A pool of gray-scale images has been
wavelet-transformed at different settings of the wavelet filter
bank and quantization threshold and with three possible boundary
policies. Our empirical evaluation is based on three benchmarks:
a first judgment regards the perceived quality of the decoded
image. The compression rate is a second crucial factor. Finally,
the best parameter settings with regard to these two factors is
weighted with the cost of implementation. Contrary to the
JPEG2000 standard, where mirror padding is implemented, our
investigation proposes circular convolution as the boundary
treatment. |
| Abstract |
Wavelet Analysis, Boundary Policies, Empirical
Evaluation |
| Keywords |
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