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Rosetta Mars
elakdawalla
post Jan 24 2012, 01:37 AM
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QUOTE (Bjorn Jonsson @ Jan 23 2012, 05:25 PM) *
I need to upgrade IMG2PNG to 'know' the Osiris data. I may do it this weekend or possibly earlier.

Now you tell me rolleyes.gif I noticed the varying color values when attempting to assemble the 4-frame mosaic. I was hoping to make one with Phobos appearing four times across the disk, but had to give up partway through; it just wasn't working.

In the meantime, here's one with Mars limb and Phobos. Pseudocolor, made of Red and UV frames only (the reason for the bizarre violet color at the limb). I had to brighten Phobos a lot to make it visible at lower resolution -- it's a very dark moon!

For those of you attempting color processing, please note that the "Red" filter is actually pretty far red, out at 744 nm. For RGB purposes it's best to use the "orange" filter at 650 nm. So you want images whose filenames end in 82, 83, and 84 (orange, green, and blue filters in combination with a neutral density clear filter) or 22, 23, and 24 (orange, green, and blue filters in combination with a regular clear filter).
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ugordan
post Jan 24 2012, 06:25 PM
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QUOTE (elakdawalla @ Jan 24 2012, 02:37 AM) *
In the meantime, here's one with Mars limb and Phobos. Pseudocolor, made of Red and UV frames only

Why didn't you use the regular OGB filter set?


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elakdawalla
post Jan 24 2012, 11:56 PM
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Because it was getting late, and somehow I missed that they were there. Ooops.


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Bjorn Jonsson
post Jan 25 2012, 12:36 AM
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I have uploaded a new version of IMG2PNG. It has a new command line parameter "-fstretch" which is used to specify how to map the floating point data to 2 byte integers in cases where IMG2PNG doesn't 'know' which parameters are applicable (in these cases it has always used the actual range of the data as described earlier).

For example:

img2png *.img -fstretch0,0.1

This is useful for forcing IMG2PNG to use the same parameters for many images which is necessary when doing color composites. To get a rough idea of which fstretch values might be good first run IMG2PNG without -fstretch and notice a line in the output that looks like this:

Floating point to 16 bit integer conversion: [-0.000023,0.059897] -> [0,65535]

This suggests that -fstretch0,0.06 might be good - or maybe -fstretch0,0.1 to avoid getting saturated areas for images where different and 'brighter' filters might have been used.

The new version is available here.

(By the way, when you run this new version of IMG2PNG the first line you see should read "IMG2PNG v2.02 20120125" - otherwise you have an old version. There were some weird problems a few days ago when uploading and/or downloading IMG2PNG so you should check this just in case).
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elakdawalla
post Jan 25 2012, 12:56 AM
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Bjorn, I just want to say here publicly how grateful I am for your continuous support of IMG2PNG. I know that you use the software yourself, which may be why you update it so regularly, but by making it available and useable by the public and maintaining it so up-to-date you are doing an immesurable service to our community. Thank you!


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ugordan
post Jan 25 2012, 08:29 AM
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QUOTE (elakdawalla @ Jan 25 2012, 12:56 AM) *
Because it was getting late, and somehow I missed that they were there. Ooops.

I had a feeling that might have been the case. Also happens to me sometimes.


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machi
post Jan 25 2012, 10:19 AM
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QUOTE (elakdawalla @ Jan 25 2012, 01:56 AM) *
Bjorn, I just want to say here publicly how grateful I am for your continuous support of IMG2PNG...


The same is true for me. Different ways how open raw pds images exists (they can be opened simply as raw file in appropriate editor), but these batch converting capabilities of IMG2PNG are unbeatable. Thank you!



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Phil Stooke
post Jan 25 2012, 05:33 PM
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This is the result of enlarging (x4) and merging twelve of the Phobos occultation frames. The noise partly cancels out leaving a clearer view of Phobos itself.

Phil

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Bjorn Jonsson
post Jan 26 2012, 12:38 AM
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QUOTE (machi @ Jan 25 2012, 10:19 AM) *
QUOTE (elakdawalla @ Jan 25 2012, 12:56 AM) *

Bjorn, I just want to say here publicly how grateful I am for your continuous support of IMG2PNG.

The same is true for me. Different ways how open raw pds images exists (they can be opened simply as raw file in appropriate editor), but these batch converting capabilities of IMG2PNG are unbeatable. Thank you!


Thanks. In a sense this is a positive feedback loop: The better IMG2PNG gets the more planetary images I get to see - which is a good thing smile.gif.
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Paolo
post Oct 1 2012, 11:27 AM
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many years later... ESA has released one Rosetta Mars image as its image of the week
Crescent Mars


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ugordan
post Oct 1 2012, 12:16 PM
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And it's Emily's composite at that.


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TheAnt
post Oct 1 2012, 02:47 PM
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QUOTE (ugordan @ Oct 1 2012, 02:16 PM) *
And it's Emily's composite at that.


Yep, last in the credit E. Lakdawalla - small world this. smile.gif
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bobik
post Feb 1 2013, 01:49 PM
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In her recent blog post, Emily Lakdawalla reminds us of the famous Rosetta/Philae Mars flyby photo. But the caption is erroneous. The view is not centered near Syrtis Major. The photo shows the border between Acidalia Planitia and Arabia Terra. On the left side is visible the southern part of Cydonia Mensae, and on the right side is visible Mawrth Vallis and the Oyama crater.
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Phil Stooke
post Feb 1 2013, 04:44 PM
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Here's a comparison to show that is correct.

Phil

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machi
post Feb 1 2013, 05:42 PM
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Quick comparison with map:
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