Could have warned us before hand ....


- Bob

I haven't seen yet any stiching of sol 747 MIs.
So here is what I get from http://qt.exploratorium.edu/mars/spirit/mi...ger/2006-02-08/:


(size reduced to 70%)

and


(full size)

That top image has some optical issues. I wonder if they are setting up a stereo sequence and you inadvertantly stitched some right and left frames together.

The highlighted (boxed) area is is the only example of non-planar layering I see in the HP photos so far. Does anyone see any other examples? Are my eyes/shadows playing tricks on me and these layers are in fact planar?

Phillip

Here's a quick observation: The dark basal unit at Home Plate may not be a true stratigraphic unit. If you follow the dark colouration from left to right in the above panorama you'll notice that it becomes less intense, more diffuse and eventually disappears. This may be an alteration product related to previous burial of the outcrop, as it seems the dark colour is most intense where the soil covering is greatest.

Another point I wanted to make was that the dark coloured, rough textured zone associated with the contact between the Upper and Middle units at Burns Cliff was similarly overprinted on the stratigraphy in a somewhat discontinuous fashion. The Burns Cliff dark coloured zone was interpretted to represent the top of the former water table, where water was drawn up through capillary action, creating a secondary porosity and mineral recrystallization.

But, again, as far as Home Plate goes, it's all guess work without any mineralogical data.

Burns Cliff:
http://www.lyle.org/~markoff/pds/257/1P153...P2270L257C1.JPG
http://www.lyle.org/~markoff/pds/257/1P153...P2444L257C1.JPG
http://www.lyle.org/~markoff/pds/257/1P154...P2275L257C1.JPG

Thank-you! Very nice! I appreciate the anaglyph.

Here there is the 3rd dimension!

Did you see that for MI there are 4 images for each feature? One of them is the right channel for stereo view, but the other 3 are interesting. It seems that they took the 3 images at different distances.
I have a supposition about. I know that there is an algorithm that allows to reconstruct the 3rd dimension from computing images of the same thing from different distances. Someone knows something more about this algorithm? I'm really interested in 3D from 2D algorithms! I used "shape from shading" with (partial) success on oppy outcrops.
My post

Probably yes. I just put all MI pics on autostitch (excluding those out of focus) and Stitch->Start.

You may be referring to the ImageJ application's Extended Depth of Field extension, available here:

http://bigwww.epfl.ch/demo/edf/index.html


Additional:

I stumbled upon a product called Helicon Focus which does a really good job of combining a stack of variably focused images into a single image in good focus:

http://www.heliconfocus.com/pages/index.php?focus_overview

Unfortunately it doesn't seem to provide a 3D reconstruction.

I encountered one or two other applications which claimed to provide a 3D reconstruction from focus information, but they were all medical related and didn't provide downloadable demos (and can also be expected to be ludicrously overpriced).

I tried using it on some MI's about a year ago, without success. I think the distance between images (depth) is too great for it.

Hmmm...I'd like to see Spirit run over that a few times to see if it's in one or two pieces.

Looking in stereo I would say they're planar, the exposed part in the boxed area is bulged -eroded on all sides.

Nico

We've just begun stepping out into the Universe and already we're planning on vandalizing it.

Cool links. This clearly would have application with clearing up the focus in some of the rover MI images.


- Bob

Whoops! Hey, That's what I call service with a smile:
http://qt.exploratorium.edu/mars/spirit/fo...55P1214R0M1.JPG
Thanks, JPL. Now if you'll just back off so we can look at the rock. Guys...?

Here is a preview of "Gibson" panorama.

(349k)