MSL Images & Cameras, technical discussions of images, image processing and cameras |
MSL Images & Cameras, technical discussions of images, image processing and cameras |
Aug 16 2012, 11:05 PM
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Senior Member Group: Members Posts: 2228 Joined: 1-December 04 From: Marble Falls, Texas, USA Member No.: 116 |
I'm still trying to figure out a number of things about the new images we are trying to work with. Assuming others are likewise trying to learn, I thought I would open this thread to create a place for such discussions.
I'd like to start out with a comment about raw image contrast. There have been several postings in the main threads about whether or not the MSL raw images have been stretched like those from the MER missions. I am certainly no expert on this, but it looks to me as if the MSL images have not been stretched at all. I haven't tried to analyze all of the image types, but the hazcams and navcams have pixel brightness histograms that are very different from their MER counterparts. This attached image compares MER and MSL navcams along with their luminosity histograms. The MSL images clearly are not using the entire, available range of brightness values, whereas the MER raws do. For this reason, the MSL raw images can usually be nicely enhanced by simply stretching the distribution of brightness across the full 256 value range. -------------------- ...Tom
I'm not a Space Fan, I'm a Space Exploration Enthusiast. |
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Sep 10 2012, 05:23 AM
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Member Group: Members Posts: 222 Joined: 7-August 12 From: Garberville, CA Member No.: 6500 |
Here's a HUMONGOUS ANAGLYPH for anyone so inclined to peruse the Mt. Sharp foothills in a reasonably perceptible quantum of 3D... and surprisingly, there's some depth there!
After testing a few stitched frames out to see whether the 12 meters or so parallax difference between Sol 19 and Sol 23's color panos allowed for any 3D depth to be seen at the Mt. Sharp foothills or not I decided it warranted a BIG anaglyph just to check. Sol 19's pano has all the pictures down but unfortunately there's still 4 or 5 that have never arrived yet from from Sol 23 so there's a few missing frames in this version (the reddish areas). Now at first glance there doesn't seem to be much depth to perceive at the foothills, but zoom in a bit, and slowly pan around and sure enough... it's there alright. Seems the more you zoom in (better in the FULL version), the more evident it becomes. Sol 23 was used as left eye and Sol 19 as right. Sweet. Here's a medium sized version (6500px x 922px): ...and here's THE FULL VERSION (19738px x 2100px): http://www.edtruthan.com/mars/Sol19-and-23...-19738x2100.jpg EDIT: This image has been updated! (missing frames are down). See this post. -------------------- "We shall not cease from exploration, and the end of all our exploring will be to arrive where we started and know the place for the first time." -T.S. Eliot
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