My Assistant
| Posted on: Aug 23 2012, 08:35 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Which makes me wonder what the data release timeline is. I couldn't find the answer with a variety of searches. Anybody know? Six months, assuming that the usual MEP PDS policy applies. http://pds-geosciences.wustl.edu/missions/mep/mepdmp.pdf |
| Forum: MSL · Post Preview: #189622 · Replies: 370 · Views: 290187 |
| Posted on: Aug 23 2012, 08:30 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
The jpeg compression on the ground introduced the "matrix" noise which shouldn't be visible with uncompressed data. I'm not so sure, this looks like residual smear artifact to me. Maybe the JPEGed "raw" frames are not so different from the original images after all. |
| Forum: MSL · Post Preview: #189621 · Replies: 370 · Views: 290187 |
| Posted on: Aug 23 2012, 08:28 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
There are a few that look grayscale/checkerboarded, which must mean we're looking at photos that have not been de-Bayered, right? Yes, these were sent losslessly compressed, and then apparently JPEGed for release, which is kinda gross IMHO. Because of compression artifacts I wouldn't bother trying to do much with these, though maybe you guys will surprise me. |
| Forum: MSL · Post Preview: #189620 · Replies: 370 · Views: 290187 |
| Posted on: Aug 23 2012, 05:53 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
FWIW and just to get on the record here, it's an "it" and its name is MSL. Call me a soulless engineer if you wish. Apostrophe error there, Doug, I recommend reading "Eats, Shoots, and Leaves": http://www.amazon.com/Eats-Shoots-Leaves-T...n/dp/1592400876 |
| Forum: Chit Chat · Post Preview: #189596 · Replies: 28 · Views: 26883 |
| Posted on: Aug 23 2012, 04:50 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
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| Forum: MSL · Post Preview: #189586 · Replies: 1152 · Views: 962313 |
| Posted on: Aug 23 2012, 01:28 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
I know the mastcams can focus, and have autofocus. I've looked, but I can't find any information about how the focus is controlled. Section 7.2, Focus, in http://rd.springer.com/article/10.1007/s11214-012-9910-4 QUOTE Do we get an out of focus image because the camera is commanded to take a picture but the autofocus is turned off? If the manual focus is set incorrectly, yes. |
| Forum: MSL · Post Preview: #189559 · Replies: 307 · Views: 455647 |
| Posted on: Aug 22 2012, 03:28 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
By the way, if anyone hasn't read Dan Limonadi's guest blog on the Planetary Society website, he gives a very clear and detailed description of how the sampling system works on MSL. Definitely worth a read, Dan did an outstanding job. http://www.planetary.org/blogs/guest-blogs...rs-1-tools.html is the first part. |
| Forum: MSL · Post Preview: #189404 · Replies: 307 · Views: 455647 |
| Posted on: Aug 21 2012, 06:57 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
So they might have to schedule in multiple readings each day with different mast rotations to nail down the direction, but will still be able to get accurate readings. REMS is on the part of the mast that doesn't rotate (below the azimuth actuator.) So this isn't possible. http://msl-scicorner.jpl.nasa.gov/Instruments/REMS/ |
| Forum: MSL · Post Preview: #189371 · Replies: 307 · Views: 455647 |
| Posted on: Aug 21 2012, 05:57 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
My real question for the future is whether this discovery selection going to Mars means the Mars budget will shrink more. Ostensibly, no. For some past Discovery AOs Mars has been explicitly excluded from consideration (when there was a Mars Scout program you proposed Discovery-class missions to that) but that wasn't the case with this AO, and my understanding is that Discovery, regardless of target, is independent of the Mars program. Of course how this really plays out, no one can say. Certainly the part of the planetary science community interested in targets other than Mars has little reason to be happy about this selection. |
| Forum: Exploration Strategy · Post Preview: #189367 · Replies: 56 · Views: 63958 |
| Posted on: Aug 21 2012, 03:10 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Here's an anaglyph of the IDD FWIW, on MSL it's not called the IDD. I used to think it was called the SA/SPaH but technically that's not the name for the whole thing. We just call the thing in your anaglyph the turret, and we call the robotic arm (RA?) the arm. It's worth remembering that when MSL was first described in the AO it had two arms, one for sampling and one for contact sensing, but those were merged. |
| Forum: MSL · Post Preview: #189343 · Replies: 307 · Views: 455647 |
| Posted on: Aug 21 2012, 04:40 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
MMM uses plain vanilla JPEG with either 4:4:4 or 4:2:2 chroma subsampling (and grayscale luminance only for the narrowband filters.) The dimensional limits referred to only apply to constraints of image size set by the hardware compressor (and only apply if you want the thumbnail to be exactly 8x smaller with no dropped pixels.) The main advantage that we have for "true color" is that the Bayer color responses are similar to the eye's, rather than being the square narrowband RGB filters used on MER. In my experience with sunlight illumination you really don't have to do any white balancing and the out-of-camera JPEG color is pretty accurate. See http://www.msss.com/images/science/mastcam...nyona19i_cc.jpg, which was brightened very slightly but looks fairly accurate without any processing. |
| Forum: Image Processing Techniques · Post Preview: #189279 · Replies: 38 · Views: 60528 |
| Posted on: Aug 21 2012, 12:41 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
My only wish is for color cameras... MSSS could provide a range of color cameras for very low mass. http://www.msss.com/space-cameras/ More information on request. |
| Forum: Exploration Strategy · Post Preview: #189265 · Replies: 56 · Views: 63958 |
| Posted on: Aug 20 2012, 03:32 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Is this a MARDI processing effect? Are there non-lossy images in the pipeline for the future? It's an interline smear effect. I've posted about that a few times now. There are ways to remove it cosmetically from the JPEG images. I don't know if we'll end up sending back all of the frames lossless. It would take quite a while to do so, especially in competition with other science data. And the smear artifacts would still be there to some degree. If we only ever have these JPEGs, I'd be about 95% satisfied personally. I started working on descent imaging in 1995 for MPL and it's been a long road. (The MPL MARDI would have gotten about a dozen grayscale frames.) |
| Forum: MSL · Post Preview: #189161 · Replies: 370 · Views: 290187 |
| Posted on: Aug 20 2012, 12:09 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
I'd be interesting in working on this project if someone knows enough to suggest a method. Stereo Photo Maker ( http://stereo.jpn.org/eng/stphmkr/ ) can save a stereo pair out in MPO format, which is a Fuji format for putting two views in a single image file. LG 3D televisions can display these files in 3D directly by just putting them on a USB drive and plugging them into the TV. I'm not sure if the Panasonic supports this format but it would be worth looking into. |
| Forum: Image Processing Techniques · Post Preview: #189146 · Replies: 21 · Views: 28432 |
| Posted on: Aug 19 2012, 05:55 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Possible uses could be to characterize the soil under the rover, slip detection during drive, etc. Read the last paragraph of http://www.planetary.org/blogs/emily-lakda.../msl-mardi.html |
| Forum: MSL · Post Preview: #189122 · Replies: 370 · Views: 290187 |
| Posted on: Aug 19 2012, 03:05 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Should it be possible to have the intrinsic parameters of the camera to allow our own image rectification... CAHVOR model in ftp://naif.jpl.nasa.gov/pub/naif/MSL/kern...20120731_c02.ti http://www.msss.com/science/msl-mardi-pre-launch-images.php have some straight lines that could be used for rough geometric removal. |
| Forum: MSL · Post Preview: #189100 · Replies: 370 · Views: 290187 |
| Posted on: Aug 19 2012, 12:00 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
I had a stab at doing an MSSS like re-projection and rotation. Net result of all 600ish frames online so far... Very nice. Barring some kind of frame in-betweening I don't know if it'll get a lot better than this. I wasn't expecting the actual touchdown to be so dark (the exposure time had to be constant all the way through). Aesthetically I think I might leave the lens distortion in because the curvy edges are distracting -- we're all used to looking at GoPro video lots more distorted than this |
| Forum: MSL · Post Preview: #189057 · Replies: 370 · Views: 290187 |
| Posted on: Aug 18 2012, 11:48 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
I suppose that sort of makes sense. It makes the photographer in me cringe, and explains the sub-par demosaicing, but I understand the logic behind it. Gee, thanks for the ringing endorsement. We can return uninterpolated frames if we want to pay the downlink volume penalty. I haven't verified this but I suspect that the web release images are going through a decompress/recompress cycle. |
| Forum: MSL · Post Preview: #189055 · Replies: 529 · Views: 461044 |
| Posted on: Aug 18 2012, 12:15 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
The sun is in the south a lot... We're in the southern hemisphere, so the sun is in the north a lot. Maybe that's what you meant? Playing with Mars24 is instructive. AFAIK sun avoidance shouldn't be a huge factor in imaging the summit, though it does have to be checked. Some of us would appreciate it if you said "MSSS will sort it all out" instead of ascribing the entire operation of the instrument to one person |
| Forum: MSL · Post Preview: #188961 · Replies: 307 · Views: 455647 |
| Posted on: Aug 17 2012, 09:48 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
1. Does anyone know of such a program that is simple and effective. Free. http://stereo.jpn.org/eng/stphmkr/ |
| Forum: Image Processing Techniques · Post Preview: #188935 · Replies: 9 · Views: 19120 |
| Posted on: Aug 17 2012, 07:46 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Can the ChemCam wear out? From http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1500.pdf -- "However, the instrument was limited to 30 analyses per sol, realistic for its expected laser lifetime of ~20,000 analyses." I'm not sure this applies to the flight unit but I would expect the laser to have some finite lifetime. |
| Forum: MSL · Post Preview: #188923 · Replies: 307 · Views: 455647 |
| Posted on: Aug 17 2012, 03:21 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
The Mars landscape comes to life in 3D, and with MSL we have many different 3D image sources. Thank you again MSSS! We appreciate the thanks but we didn't build the engineering cameras. 3D with Mastcam will be tough because of the different focal lengths. The best 3D source will likely be from MAHLI, since we can move the viewpoint around with the arm. I've been using StereoPhoto Maker to output images in MPO format for display on an LG 3D television. This is definitely a nice technology that didn't exist back on MER. |
| Forum: MSL · Post Preview: #188893 · Replies: 373 · Views: 260807 |
| Posted on: Aug 16 2012, 11:54 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Cool -- so if one were particularly keen, one could partially reconstruct the relative motion of the heatshield (through the frame) between frames? In theory I guess there's some information there, though it would require an understanding of how smear is formed (and since the scene is moving pretty slowly in this sequence, there's probably not much if anything that normal interpolation/tracking between frames couldn't tell you.) |
| Forum: MSL · Post Preview: #188846 · Replies: 370 · Views: 290187 |
| Posted on: Aug 16 2012, 04:09 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Hopefully mcaplinger can tell us. Why ask me when you've got Mike Malin? google for "interline smear": http://www.truesenseimaging.com/support/re...ge-sensor-smear The smear moves since the image is moving as the CCD is being read out. |
| Forum: MSL · Post Preview: #188794 · Replies: 370 · Views: 290187 |
| Posted on: Aug 15 2012, 07:48 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
MSL sundial / calibration target is spare piece of flight hw from MER project...this article Interesting article. One note: even though the artwork shows "Mars 2012" the actual cal target still said "Mars 2010" at the top the last time I saw it in early 2010 (it wasn't updated after the launch slip.) You can't see this in the Mastcam image because the gnomen occludes it. Maybe it got revised at JPL but I doubt it. |
| Forum: MSL · Post Preview: #188712 · Replies: 1152 · Views: 962313 |
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