High order bit reconstruction Options

[Malmer]

I have noticed that Cassini sometimes sends back images as 8bit by dropping the high order values in the 16 bit data. (edit: correction, the 12bit original data)

I wrote some code that follows the gradients in the images and tries to guess the most likely high order bits. Then i use manual methods to fix the areas where my code got it wrong...

Am I reinventing the wheel here? Is there any official method for dealing with these kinds of images?

[Ian R]

I *think* this problem may have been addressed recently:

http://photojournal.jpl.nasa.gov/catalog/PIA18411

[ugordan]

That's a very nice reconstruction. Back when I was playing around with Phoebe encounter data, I contemplated doing the same thing, but never got around to actually implementing it for what appeared to be a remarkably grey body anyway. I'm not aware of any official method for reconstructing the dynamic range, but who knows what kind of plugins exist for Isis 3 nowadays...

I will say that I'm glad they employ this encoding very rarely.

[4throck]

I think that type of reconstruction can be used on other images.
For example, here's a CIVA image just after Philae's release from Rosetta:



http://blogs.esa.int/rosetta/2014/11/12/farewell-rosetta/

[Malmer]

I think that type of reconstruction can be used on other images.
For example, here's a CIVA image just after Philae's release from Rosetta:

Since it is a .jpg image it might not work as intended. A .png would have been nice.