[extropy-chat] Frozen water ice found by ESA Mars Express on Mars.

[Bret Kulakovich]

Additionally: (having gone back to review the image)

It is not unusual in space science to take your 'flat' color photos  
in the visible spectrum, and use them to texture a three dimensional  
model made from the topographic data made at a non-visible frequency.  
So bouncing radar off the surface creates the 3d, then the image is  
thrown over that model like a tablecloth.

What they are indicating about the image is that they took the 3d  
data and 'stretched' it a tiny bit in the up-down axis, to make it  
more dynamic. They may have then used it to 'tilt' the model to add  
the perspective shown in their imagery.


]3



On Jul 30, 2005, at 3:58 AM, Jeff Davis wrote:

> --- Bret Kulakovich <bret at bonfireproductions.com>
> wrote:
>
>
>>
>>
>> Beautiful. It's just beautiful.
>>
>>
>> Enjoy the frosty Hi-rez goodness.
>>
>>
> Stunning, absolutely.
>
> Just a little question.
>
> The data was collected with the High Resolution Stereo
> Camera (HRSC), or so the text states, which I'm
> guessing makes three dimensional measurements (ie
> surface contour measurements) possible.
>
> The text says:
>
> "The colours are very close to natural, but the
> vertical relief is exaggerated three times."
>
> So it's not really a photograph in the usual sense,
> but rather a computer "revised" image" where the
> "apparent" relief has been made to seem three times
> what it really is, right?
>
> Beautiful, nearly the right colors, but not what you
> would see if you were looking at it, ya?  Not reality,
> but sort of reality? Partly not real?  In an orderly,
> intending-to-enhance sort of way?
>
> Best, Jeff Davis
>
>    "Everything's hard till you know how to do it."
>                            Ray Charles
>
>
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