Nice work Kurt! The detail you pulled out is excellent. I probably should have used deconvolution as well, but didn't get around to it. The background noise that you mention can be removed quite easily in Photoshop, by selecting background areas with the magic wand, feathering the edges, and then applying a median filter. I like your processed image. Cheers, Tyler -----Original Message----- From: utah-astronomy-bounces+tylerallred=earthlink.net@mailman.xmission.com [mailto:utah-astronomy-bounces+tylerallred=earthlink.net@mailman.xmission.co m] On Behalf Of Canopus56 Sent: Wednesday, September 27, 2006 12:23 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] Re: Image processing, cont. --- Patrick Wiggins <paw@wirelessbeehive.com> wrote:
The ZIP file is temporally located at http://utahastro.info/temp/7331RAW.ZIP . It's about 9 megs.
Patrick graciously distributed his calibrated fits images. As a learning challenge on how to handle the bright core and faint disk, I tried processing Patrick's images to see how close I could get to Tyler's work. The results are in gallery folder: http://www.utahastronomy.com/view_album.php?set_albumName=KafAIP4WIN My folder is on the last page (page 4) of the Utah Astro Gallery. Look for the AIP4WIN study folder. Image 1 in the folder was my best result - http://www.utahastronomy.com/view_photo.php?set_albumName=album44&id=Image9D econvolvedLucyRichardson Not as good as Tyler's result at: http://www.trilobyte.net/paw/slas/patrickw/PATRICKW1013.JPG in Patrick's web page at- http://www.trilobyte.net/paw/slas/patrickw/PATRICKW04.HTML - but still passable. Over the past few months, there have been a series of posts on the listserv asking about basic imaging processing. In my AIP4WIN study folder, I have posted a series of 16 images and screen shots that are my beginner notes on how I processed the image. That may be of interest to other image processing newbies here. I realize that probably none of you are using AIP4WIN, but the general processing techniques are the same in most software. For example, many of the same steps shown in the study folder can be replicated using the Meade AutoStar software. The purpose of the slides is to study general imaging principles. Then learn how those principles are applied in your software of choice. Criticisms and suggestions for improving the technique that I used are welcome. It's the only way to learn. For example, there is a k-sigmoid noise removal tool in AIP4WIN, that should take out the noise put into the image by sum stacking. It worked, but it thrashed the rest of the image. So, I could not pull out the sky background noise added by the sum stacking operation. Clear Skies - Kurt __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.utahastronomy.com