[X] My Assistant

[Zelenyikot]

Little veins in Shaler on Sol 322

Attached thumbnail(s)

 

[SFJCody]

http://astrogeology.usgs.gov/news?id=news/...nhoff-road-trip

We have started the long traverse to the base of Mt. Sharp (Aeolis Mons), the long-term goal of the mission! It may take a year to get there, depending on how many interesting features we find along the way. The challenge for the science team will be to identify the most important targets along the way, and to study them without delaying drive progress too much. Today we are planning targeted observations, followed by another drive over the weekend.

Here we go then! Mountain bound! Looks like a new thread may be in order, too.

[Gerald]

Trying to "dust de-coat" a sol 336 MARDI image:

Link to gif before/after "de-coating".

"De-coated" image:


The image has been "de-coated" in the following way:
Retrieve the color of one of the darkest spots of the wheel, assumed as black;
fill an image uniformly with that color, darken it a little bit (5-10%);
subtract the the resulting uniformly colored image from the original image;
brighten the resulting difference image by duplicating the pixel values.

Some more improvement may be possible by additional de-vignetting.

[mcaplinger]

Some more improvement may be possible by additional de-vignetting.

Subtracting a constant color is just equivalent to a stretch and color correction. It might be that the dust scattering varies across the field, but it doesn't look like it to me, at least not strongly.

I've gotten OK results by just auto-white-balancing the image and then stretching it a little, since all the dust is doing to first order is tinting the image and reducing contrast. It's a little out-of-focus because MARDI is focused at infinity, and a light high-pass might help that if you like that sort of thing (I avoid high-pass whenever possible because it boosts noise, compression artifacts, etc., but that's mostly a matter of taste.)