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Flatfield Image Generation
antonio19812
post Jul 6 2016, 07:02 PM
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Anyone can help me suggesting me how to process the raw images from the VMC of Mars Express? I am working with them in Python, and I managed to get both the raw unfiltered and the RGB images, but only in the raw version. I am doing it without using the exsisting tools. I have not a deep knowledge about this topic and I would like to have some hints about it. Anyone has some interesting link or can suggest some person that could help me?
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Gerald
post Jul 11 2016, 04:20 PM
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Are you talking about a flat field image or a flat-fielded image?
Once you have a flat-field, devide the raw image by the flat-field (requires floating point arithmetics, with a subsequent stretch over the available brightness range).
If you don't have a flat-field, in some cases sky images are available. Average over some of them, and use this average as a flat-field.
If no sky images or laboratory flat fields are available, things get more complicated. You could then try to infer a flat-field from overlapping images, but that's beyond what I can tell out-of-the-hip.
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Posts in this topic
- antonio19812   Flatfield Image Generation   Jul 6 2016, 07:02 PM
- - antonio19812   Could anyone help me suggesting an algorithm or a ...   Jul 11 2016, 03:06 PM
- - Gerald   Are you talking about a flat field image or a flat...   Jul 11 2016, 04:20 PM
|- - antonio19812   QUOTE (Gerald @ Jul 11 2016, 06:20 PM) Ar...   Jul 15 2016, 07:34 PM
- - JohnVV   the easiest way would to use ISIS3 and the tools f...   Jul 11 2016, 07:57 PM
- - JohnVV   why not start with the calibrated data http://pds...   Jul 11 2016, 08:01 PM
- - nprev   MOD NOTE: The second thread began by this user has...   Jul 12 2016, 01:11 AM
- - JohnVV   there is a already made flat image http://blogs.es...   Jul 15 2016, 08:44 PM
|- - antonio19812   QUOTE (JohnVV @ Jul 15 2016, 10:44 PM) th...   Jul 15 2016, 10:11 PM
- - JohnVV   i have a feeling we are talking about two differen...   Jul 17 2016, 03:52 AM
- - Herobrine   IANAE I've experimented with generating a ...   Jul 26 2016, 05:20 PM

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