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YAWICA stands for Yet Another Wavelet based
Image Compression Algorithm, it
is the result of my diploma thesis.
This source code is for educational
purposes only and not for any commercial application. So it is neither
optimized for speed nor does it accept other image material than PGM images
with 256 grey levels. It is intended for photo realistic images and will
give a poor performance on bilevel ones. Here some PSNR-values in dB for
different images transformed with the 9/7-wavelet with 0.5 bpp in comparsion
to SPIHT and
EBCOT.
| picture | resolution | SPIHT | EBCOT | YAWICA |
|---|
| lena.pgm | 512x512 | 37.25 dB | 37.32 dB | 37.68 dB |
| barbara.pgm | 512x512 | 31.40 dB | 32.31 dB | 32.25 dB |
| goldhill.pgm | 512x512 | 33.13 dB | 33.24 dB | 33.49 dB |
| mandrill.pgm | 512x512 | 25.65 dB | 25.58 dB | 25.82 dB |
| bike.pgm | 2048x2560 | 33.01 dB | 33.55 dB | 33.66 dB |
| cafe.pgm | 2048x2560 | 26.49 dB | 26.84 dB | 27.24 dB |
| woman.pgm | 2048x2560 | 33.59 dB | 33.65 dB | 33.95 dB |
The README included in the
yawica tarball contains more
information.
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downloads
links
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