Recently, a new algorithm based on anisotropic PDE's has been
released. The algorithm is written in C++ and is open source. You can
find the program, GREYCstoration, at
http://www.greyc.ensicaen.fr/~dtschump/greycstoration/ .

The algorithm does quite well with denoising images while keeping the
structure of an object intact. The results are comparable to wavelet
smoothing processes that are found in other applications like MATLAB.

In addition, the program utilizes the algorithm to process a function
called 'inpainting' to erase observational artifacts. This can
significantly ease the process of cleaning up an image.

The third function of the GREYCstoration program is resizing. The
program appears to resize images comparable and sometimes better than
cubic functions. For examples of its abilities visit
http://www.greyc.ensicaen.fr/~dtschump/greycstoration/demonstration.html
. If you would like to see some astronomy examples visit
http://hea-www.harvard.edu/~ascpub/greyc/ . All the images have the
originals placed on the left hand side and the processed images on the
right.

We'd like to start some discussion on this, send any feedback, or
ideas on this algorithm.


~Eli




--------------------- Chandra X-ray Center ----------------------
Eli Bressert, Science Imager
http://chandra.harvard.edu

Harvard-Smithsonian Center for Astrophysics
60 Garden St. MS-67, Cambridge, MA 02138
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