Hi Robert,

After talking to some more people about the GREYCstoration algorithm, the installation procedure has been concluded to be a rather tedious and complex process. To remedy this, an installation guide for GREYCstoration has been written up. You can find the guide at http://www.cfa.harvard.edu/~ebresser/install_greyc/ which elucidates what is required to install the program and how to setup GREYCstoration to run nicely on your system. At the moment, the guide only applies to Mac OS X, but will expand to other operating systems in the future. The guide is open to anyone who wants to install GREYCstoration on the Mac. When more are images processed through GREYCstoration, we will definitely post them.

Hope this this helps!

~Eli



--- In astro-viz@yahoogroups.com, Robert Hurt <hurt@...> wrote:
>
> Eli,
>
> Wow, that's a pretty intriguing algorithm, and the results with
> Chandra data are really impressive! Thanks for the heads-up!
>
> I'm itching to try it on some noisy examples of data I'm working
> with, but alas the typical tedious unix install process has left me
> with nothing runnable after an hour of mucking about (can't seem to
> get ImageMagick, which is a dependancy, properly installed... sigh...
> this is why I prefer non-sourcecode-easy-install Mac apps).
>
> Of course if this ever got rolled into a Photoshop plugin... that
> could really do some amazing things for workflow and image quality!
>
> Make sure to post more on this if you continue experimenting with
> this in your Chandra imaging.
>
> Cheers,
> Robert
>
> On Mar 15, 2007, at 9:20 PM, ebressert wrote:
>
> > 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
> > ----------------------------------------------------------
> >
>
> ______________
> /
> / "It makes little difference whether or not you destroy this planet.
> It is a classic type 13 planet which typically destroys itself about
> this stage in its development... sometimes through war, often through
> environmental catastrophe, but more commonly a type 13 planet is
> unintentionally collapsed into a pea-sized object by scientists
> trying to determine the mass of the Higgs Boson particle.
>
> -790, Lexx
>