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Processing raw images, Tips, tricks, flatfields, unrelated to a specific rev
Juramike
post Aug 22 2010, 08:51 PM
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Here is a "dark frame" for Cassini raw images as of August 21, 2010.



Yesterday the spacecraft took four shots of a star field in Leo, to the W of Regulus. Here is the stacked view of the starfield images. The Astrometry flickr group provided the coordinates of the star field. There is a link in the comments section to the World Wide Telescope view.

Using the starfield image to which are real stars, I recoordinated on the non-stellar regularly appearing blips and bloops, restacked the images, and clone stamped out the stars (which appeared in a parrelelogram pattern in the final image.


[EDIT: Restacked using "Multiply" blend mode, then contrast-enhanced. Only the consistent blips and bloops show up as white pixels now.]

New version:
Attached Image


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Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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- Juramike   Processing raw images   Aug 22 2010, 08:51 PM

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