Where is New Horizons now |
Where is New Horizons now |
Mar 29 2006, 02:58 PM
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#101
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Junior Member Group: Members Posts: 22 Joined: 2-March 06 Member No.: 691 |
i found this web site
http://www.heavens-above.com/solar-escape.asp it show where NH is compared to voy1, 2/pioneer any one else have a fav web page that shows NH loc? I think this one is updated onece a day |
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Aug 14 2010, 12:02 PM
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#102
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Newbie Group: Members Posts: 16 Joined: 30-March 08 Member No.: 4078 |
Thank-you john_s, I didn't realise that the smear was quite so bad! Do you just use a naive subtraction or deconvolution type approach (or something a bit more advanced)? Looks like some sort of denoising approach might be necessary to help get rid of the smear removal artefacts. Might be an interesting project to play around with in my spare time
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Aug 17 2010, 03:52 AM
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#103
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Member Group: Members Posts: 701 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
Thank-you john_s, I didn't realise that the smear was quite so bad! Do you just use a naive subtraction or deconvolution type approach (or something a bit more advanced)? Looks like some sort of denoising approach might be necessary to help get rid of the smear removal artefacts. Might be an interesting project to play around with in my spare time Readout smear isn't bad at all at Pluto, because the "real" images have much longer exposures than the superposed "readout smear image", and the algorithm that's used to remove the smeared part of the image is accurate if no part of the image is saturated (though I can't tell you the actual algorithm offhand), and leaves behind no artifacts except a little additional random noise. If part of the image is saturated we have to resort to cruder subtraction methods, using regions of dark sky in the image to determine the smear contribution. John |
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