Clouds, Clouds over Victoria |
Clouds, Clouds over Victoria |
Oct 9 2006, 11:46 AM
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#1
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Senior Member Group: Members Posts: 2823 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
With the images of clouds coming down, it is time for a new thread.
Here is just part of a panorama. Autostitch was not able to stitch more than those 2 images of 4 images. I think because there are not enough matching points. Maybe one of the other programms can do it better? Taken with the L0 navcam on Sol 962. jvandriel EDIT. I have done my math again and the Sol is not Sol 962 but Sol 950. I know there is a little program for finding the right Sol but i can't find it. jvandriel |
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Oct 27 2006, 02:06 PM
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#2
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
That's a very early morning image, with the sun off to the right, and the image has been stretched quite a bit to get the detail of the ground to show well, so the sky has been saturated.
Some superb results from the PDS released Viking camera data - http://www.astrosurf.com/nunes/explor/explor_vik.htm Particularly - http://www.astrosurf.com/nunes/explor/viki...03calstrech.jpg Doug |
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Oct 28 2006, 03:49 PM
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#3
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Member Group: Members Posts: 378 Joined: 21-April 05 From: Portugal Member No.: 347 |
Some superb results from the PDS released Viking camera data - http://www.astrosurf.com/nunes/explor/explor_vik.htm Doug Hi, I processed those images, based on the gain settings on the Viking cameras and the color filter wavelenghts. The MER images here: http://www.lyle.org/~markoff/ provide a good idea of the general brightness and color tone of Mars. They are, as best as I know, the only proper calibrated Martian images, because they were based on a large number of filters, that cover all the visible spectrum (MER images generated by using the 6 filters with gamma correction). The important thing is that, after applying my processing protocol, all Viking images look consistent with the MER and Pathfinder results. Even sunsets and sunrises. One thing that I couldn't correct was the camera gradient in the upper part if the image. So the sky still looks as if it darkens a lot above the horizon... -------------------- _______________________
www.astrosurf.com/nunes |
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Oct 28 2006, 03:58 PM
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#4
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
I believe there is some kind of obstruction that causes the darkening. Another problem with Viking color, which I am sure you have encountered, is that since the images were 8-bit selectively cut down to 6-bit for transmission, there are a lot of washed-out skies.
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Oct 28 2006, 04:12 PM
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#5
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Member Group: Members Posts: 378 Joined: 21-April 05 From: Portugal Member No.: 347 |
... since the images were 8-bit selectively cut down to 6-bit for transmission, there are a lot of washed-out skies. Yes... that's apparent when I corrected the images for gain. See this one for example: http://www.astrosurf.com/nunes/explor/explor_vik.htm I didn't try to change the original look of the data much, but in some cases I Just filled the sky with a uniform "general Mars Sky color". -------------------- _______________________
www.astrosurf.com/nunes |
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Oct 28 2006, 08:49 PM
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#6
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
That is what I was referring to...I have done the same. But my work has always been focused more on super-resolution...which is why I was thrilled when you draped your color data over some of my black and white images.
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Oct 28 2006, 09:13 PM
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#7
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Member Group: Members Posts: 378 Joined: 21-April 05 From: Portugal Member No.: 347 |
http://www.astrosurf.com/nunes/explor/viking/21i093_cal.jpg
Sorry, I wanted to include a direct link to this image. -------------------- _______________________
www.astrosurf.com/nunes |
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Oct 28 2006, 11:11 PM
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#8
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
When I worked with that image, I didn't even try to mosaic it wit that very overexposed set. In this version, I did some color cloning near the left side of the image to get rid of color noise caused by "salt and pepper" in the raw data.
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