29-30 August 2007 Icy Satellites (rev 49), Last stop on the road to Iapetus |
29-30 August 2007 Icy Satellites (rev 49), Last stop on the road to Iapetus |
Aug 9 2007, 10:40 PM
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SewingMachine Group: Members Posts: 316 Joined: 27-September 05 From: Seattle Member No.: 510 |
CICLOPS' Rev 49 Looking Ahead page is up. Highlights include a fourth monthy Voyager-class encounter with Tethys with 500m resolution over Odysseus (finally!)
Detailed mosaics of Rhea's prominent ray crater and points west are on tap for Old Scabby's second closeup. This should be a really cool periapsis passage to tide us over until the 10th of September. -------------------- ...if you don't like my melody, i'll sing it in a major key, i'll sing it very happily. heavens! everybody's all aboard? let's take it back to that minor chord...
Exploitcorporations on Flickr (in progress) : https://www.flickr.com/photos/135024395@N07/ |
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Sep 4 2007, 06:22 PM
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
OK, I've now done a side-by-side comparison of three methods of removing the every-other-line truncation: de-interlacing, taking the maximum of two layers, and my laborious method described above. De-interlacing seems to do the best job of the three because of the interpolation step. And you can even get away with applying it to the whole image (which effectively throws out half of the image's original pixels, replacing them with pixels interpolated between the remaining pixels) without very much loss of detail, even for these Rhea-crescent pictures, which are full of detail. It's better to select the area with the truncated lines and just apply the filter to that, but if you want to do a quick-and-dirty job the quality doesn't suffer much if you batch process a whole folder's worth of pictures.
The three strips below were produced from N00090982.jpg, with the Maximum, De-Interlace, and my methods applied to the corner that had the truncated lines. --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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