Io Blog |
Io Blog |
Feb 26 2008, 08:50 AM
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Just let you all know about a new blog I've started called The Gish Bar Times located at http://gishbar.blogspot.com/ . I intend to use the blog to cover Io-related news like new papers or abstracts, developments with the flagship mission selection process, newly processed images, volcano news, or pretty photos taken of Io and Jupiter. I hope you all enjoy!
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Aug 19 2010, 08:26 PM
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Would correcting my images using your code be affected by the fact that I've already corrected for the sun's varying flux at different wavelengths? The pixel values are derived from the calibrated I/F values, with each filter being stretched to 8-bit 0 (black sky) to 255 (brightest 'valid' point in the red filter image).
The visual spectra are located at http://web.archive.org/web/20031209213618/....edu/index.html . The data is under Images and Spectra, and there are tables for the leading and trailing hemisphere. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Aug 19 2010, 10:22 PM
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Would correcting my images using your code be affected by the fact that I've already corrected for the sun's varying flux at different wavelengths? No, in fact it assumes I/F data. It needs to be I/F if you want icy bodies turning out white in sRGB which is the way I prefer. QUOTE The visual spectra are located at http://web.archive.org/web/20031209213618/....edu/index.html . The data is under Images and Spectra, and there are tables for the leading and trailing hemisphere. Thanks. Here's what that gives for Io's leading hemisphere. Left is gamma correct, right is everyone's preferred look. I make no claims on accuracy or correctness of my code. FWIW, the other 3 moons' hue looks similarly yellowish with Europa being most pale yellow (leading hemisphere at least). I would also add that since these are very low phase spectra by nature (ground obs), the colors will always look subtler than typical for spacecraft which can get much higher phase imagery. That can be seen in that Galileo mosaic as well - compare to the other, higher phase version of your composite I posted in the Galileo Imagery thread. -------------------- |
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