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Stereoscopic images of Titan's surface constructed

CozmsBrpng writes "If you can successfully view stereoscopic images then you can behold the surface of Titan in all its grainy 3D glory. And, in case you missed it, you can also listen to a human ear-friendly version of the descent radar and the winds in Titan's atmosphere courtesy of the DISR team at The University of Arizona."

36 of 152 comments (clear)

  1. Not Much use for Stereoscopic imaging by poopdeville · · Score: 5, Insightful

    Really, there wasn't enough relief in those pictures to be worth inducing several thousand splitting headaches across the globe.

    --
    After all, I am strangely colored.
    1. Re:Not Much use for Stereoscopic imaging by Eadwacer · · Score: 3, Informative

      Yea, but there's enough relief to see that the black "channels" don't follow it. On the first pic they look like some of them run cross-slope, and on the last pic it looks like they run on the ridgelines, as if we were looking at something bulging up from below.

    2. Re:Not Much use for Stereoscopic imaging by toxic666 · · Score: 2, Interesting

      I have used stereo enough that I don't need the painful little glasses anymore. The secret is knowing how to look at then while focusing at "infinity". Takes some practice. Learned it while studying geology, specifically geomorphology (the science of geology and landforms).

      Printed at full 8.5" x 11" size and they are fascinating. I was stunned by the dendritic erosion patterns and flat basins. And there is plenty of relief if you know how to look at them, it just takes a trained eye.

      But this ain't "geo"morphology. Hell, water is a rock-forming mineral thereabouts. I will enjoy looking them over, though. Wish I had the raw data from the probe available to go along with the pics.

    3. Re:Not Much use for Stereoscopic imaging by Bush+Pig · · Score: 2, Interesting

      I think he's talking about folding pocket stereoscopes, one brand of which was "Cassella". I used to use them, and larger deskbound equivalents, as well as precise stereoplotters, when I was an army cartographer. Cassellas were used by phot interpreters during WW2, if not even earlier.

      I was actually quite interested to find that I could see the stereo images without a viewer (as I'd never been able to before).

      --
      What a long, strange trip it's been.
    4. Re:Not Much use for Stereoscopic imaging by Spy+der+Mann · · Score: 2, Funny

      Well, i couldn't watch the Titan images. But the stereo images of the houses were easy.

      a) Copy the images in your clipboard
      b) Open them in Irfanview (if you use windows)
      c) Reduce them to 65% size.
      d) Grab an envelope and make sure each eye can only see one image (the envelope will also make sure you won't stay that close to the screen)
      e) Focus

      Now if you excuse me, i have to welk to the house i think i gott a tliele dizzy oops

  2. Looks like a sailboat by Anonymous Coward · · Score: 3, Funny

    If you can't see it, you know what you need? What you need is a fatty boom batty blunt. Then I guarantee you'll see an ocean, a sailboat and maybe some of them big-tittied mermaids doin' some of that lesbian stuff.

  3. AHH My eyes!! by NeoGeo64 · · Score: 4, Funny

    Don't try to view these pictures if your refresh rate is 60Hz. My vision blurred up for about three minutes and I started freaking out.

    1. Re:AHH My eyes!! by __aaclcg7560 · · Score: 3, Funny

      My vision blurred up for about three minutes and I started freaking out.

      That's nothing. I was at a party last night when someone turned on the fog machine without telling anyone. One-third thought there was a fire in the kitchen because it was smokey, one-third thought they needed glasses because their vision was blurry, and one-third thought they were inhaling some great stuff until they notice their brain chemistry was still inert. Half the party ended up being outside for the rest of the night.

  4. For all it's worth by Rosco+P.+Coltrane · · Score: 3, Informative

    I find it easier to print stereograms like these. Perhaps even re-position them really close to each other in GIMP before printing it out. they seem to be easier to "lock on" on paper than on screen. There's just no way I can see them on screen.

    --
    "A door is what a dog is perpetually on the wrong side of" - Ogden Nash
    1. Re:For all it's worth by MillionthMonkey · · Score: 2, Interesting

      I find it easier to print stereograms like these. Perhaps even re-position them really close to each other in GIMP before printing it out. they seem to be easier to "lock on" on paper than on screen. There's just no way I can see them on screen.

      If you're editing them in GIMP or Photoshop, try reversing their order, so you look at them crosseyed. I usually start by holding a finger in front to get them to coincide.

      I can do both, but I find the crosseyed method a bit easier than the parallel method- the images can be further apart and your eyes can cross much more easily than they can diverge. The "parallel" viewing method may actually require eye directions that are slightly outside parallel. If your intraocular separation is not as large as the separation between the images on the screen, you'll run into problems with divergence. Unless you are a lizard, or you've had a stroke, your brain will fight very hard to avoid divergent eye directions.

      When I'm on vacation I sometimes take shots like this. Take a picture of a canyon or something, move some small distance to the right, and take the same picture again. Sometimes it works. When I'm in very dull meetings, I sometimes pass the time by doodling stereograms freehand. Sometimes they actually work too.

  5. Interesting, but not Inspiring by pegasustonans · · Score: 4, Insightful

    I still say Titan is interesting, but it's not the ticket that's going to inspire the everyday person to learn more about the possibilities of Space research. I love the adventure of truly great scientific endeavors, but more people need to be inspired for NASA to get the funding it deserves IMO.

    --
    And all our yesterdays have lighted fools The way to dusty death. --Will
    1. Re:Interesting, but not Inspiring by Quantum+Fizz · · Score: 3, Interesting
      In a way I think what was most inspiring about Titan was the great unknown. We didn't know if there was a solid surface, liquid oceans of hydrocarbons, obvious forms of life, etc. It was really a huge deal, getting the probe onto the surface, with the ability to survive a variety of scenarios (liquid ocean, solid land, muddy tarpits, etc).

      After the probe landed, and we saw a seeming barren rocky surface, the mission suddenly isn't as sexy anymore. To many in the general public, it's yet another rocky barren landscape, not much different from the moon, Mars, etc. Of course to the planetary scientists there's loads of amazing things to study. But to the average Joe, there unfortunately wasn't anything groundbreaking to instill a sense of awe.

  6. I see it! by oozer · · Score: 5, Funny

    Oh yeah, look it's a sailboat.

    1. Re:I see it! by roman_mir · · Score: 3, Funny

      That's it, I am going to stand here until I see a sailboat. I hate this picture!

  7. can't stereoview by Anonymous Coward · · Score: 5, Funny

    I can't see stereoviews, I only have one eye.. you insensitive clod!

    1. Re:can't stereoview by sageo · · Score: 5, Funny

      Titan > Cyclops.

  8. Re:3D Glasses? by poopdeville · · Score: 2, Informative

    You already have the equipment. Just cross your eyes while looking at it until your eyes focus and click. You'll know what I mean when you get it right.

    --
    After all, I am strangely colored.
  9. Hahaha.... by jrushton · · Score: 2, Funny

    I can imagine millions of slashdotters around the world all going crosseyed at this. Brilliant :)

  10. Viewing Stereoscopic Images by Anonymous Coward · · Score: 3, Insightful

    Firstly, it would be beneficial if the images were separated by a black space. Having the images touching each other requires being a 'real' pinhead for viewing. Secondly, if wearing glasses, take them off; as the lenses of the glasses (which are doing what they are meant to do ... focus each eye independently), do not lend themselves to viewing stereoscopic images.

  11. those stereograms are teh suck by Illissius · · Score: 2, Informative

    I'm good at them, and I still couldn't get much out of those besides a headache. Here's a bunch of better ones, just to show that they don't suck universally.

    --
    Work is punishment for failing to procrastinate effectively.
  12. Stereoscopic viewing = Jedi mind trick by Sumo+spice · · Score: 2, Funny

    Relax let the stereoscopic image flow through you.. Master I just can't see it. Relax your eyes you must.. Master it's impossible. Know you already what is possible and what is not? But I'm trying, I just can't see this teapot or whatever. hmph do or do not, there is no try.. ...grumble...grumble I sense much anger in you..

  13. Lets hope ESA never provides... by Anonymous Coward · · Score: 2, Funny

    ...stereoscopic images of Uranus.

  14. Why no terrain model? by amightywind · · Score: 3, Insightful

    With very slight additional effort these researchers could have released a terrain model based on the paralax offset of features in the image and saved us all from straining our eyes.

    The Titan imaging results are simply fantastic. Huygens landed in an area that is analogous to a terrestrial dry lake bed wetted by an upland stream network fed by methane rain! How often does it rain? Are there large weather systems on titan? Convective storms? What about the black stuff on the lake bed and at the bottom of the streams? What is it made of? Is is particulate like terrestrial sediments? I am a little disappointed that we haven't heard more speculation from project scientists. I think the Cassini/Huygens project has been somewhat guarded about releasing preliminary results than the Mars Rover project.

    --
    an ill wind that blows no good
    1. Re:Why no terrain model? by Bad+D.N.A. · · Score: 2, Insightful

      Um, there is a difference between speculation and preliminary results.

      Speculation is science fiction

      Preliminary results is science

      There was a great deal of information and speculation on the Mars/Water issue. It did
      not take a lot to jump to preliminary results.

      Titan does not have anywhere near the scientific background that Mars had and so it takes much longer to reach preliminary resutls.

      I applaud the scientists for taking the appropriate amount of time to publish the observations.

      --
      "Truth is much too complicated to allow anything but approximations"
  15. FYI by KinkifyTheNation · · Score: 2, Informative

    Also for some people it may help of you open the images in a photo editor, cut out one of the images and move it to the other side, then all you need to do is cross your eyes until the two images meet. I've always found it easier and less straining on the eyes if you do it this way.

  16. I prefer wiggle images by FleaPlus · · Score: 2, Informative

    Personally, I prefer wiggle images, where you make an animated GIF of two close-by images. You don't have to hurt your eyes, and it gives you a good idea of depth. Here's a web site with several "wiggle images" made from Mars Rover data:

    http://space.brownpau.com/mars-rover-wiggles/

    1500 imaginary mod points to whoever uses GIMP or Photoshop to cut the individual images out of the photos of Titan, makes an animated GIF out of them, and posts them online.

    1. Re:I prefer wiggle images by LiNKz · · Score: 2, Interesting
      --
      Proceed with Format (Y/N)? Y
  17. I don't mean to belittle the accomplishment by moultano · · Score: 2, Interesting

    I don't mean to belittle the accomplishment of getting the probe to titan, but as a lay person, none of the images that have come back have been all that impressive. What is the technical reason for this? Is it a bandwidth issue? Or were these launched long enough ago that this quality of images was state of the art for spacecraft?

    1. Re:I don't mean to belittle the accomplishment by Graymalkin · · Score: 4, Informative

      You hit upon two very salient truths about the Huygens probe. The main imaging instrument on Huygens is the Descent Imager Spectral Radiometer (DISR). It contains only a single CCD. The various lens assemblies are connected to the main CCD by a series of optical fibers, each shines light on a different region of the CCD. The CCD is 512x520 pixels though about half of that is reserved as a storage section, the left over 256x520 pixel area is used for the imagers and spectrometers. The visual imagers of the DISR intrument are the High Resolution Imager (HRI), Medium Resolution Imager (MRI) and the Side Looking Imager (SLI). There's also two spectrometers, the Upward-Looking Visual Spectrometers (ULVS) and the Downward-Looking Visual Spectrometer (DLVS). Finally there's space reserves for the Solar Aureole camera which is used to measure sunlight streaming through the atmosphere to determine the size of particles within it.

      The HRI is 160x254, the MRI is 176x254, and the SLI is 128x254 pixels each. Larger images have to be assembled as mosaics and even these aren't going to be large enough to compete with the megapixel images from the MERs. The Pancams and Navcams on the MERs are 1024x1024 each and have essentially a full range of motion so really nice panoramas are easy to create. The DISR is fixed on Huygen's chassis.

      Bandwidth is also a tremendous issue with Huygens. The Huygens probe only hasd a 4800bps datalink to Cassini and has to transmit all of its images within two and a half hours. Even with its limited data rate Huygens was able to transmit 350 images back from Titan which is rather impressive.

      So it is a combination of geometry, bandwidth, and limited technology. Also remember that despite these images being relatively stark in comparison to MER images they contain tons of very valuable information. When researches have had more time to process Huygens images they will get prettier. Until then they're going to remain relatively bland to laymans' eyes but terribly exciting to scientists.

      --
      I'm a loner Dottie, a Rebel.
  18. Bad setereo image?? by darkonc · · Score: 3, Interesting
    I don't think that these images are all that good for stereo for a couple of reasons:
    • These pairs seem to be taken with different filters. This would, at least, explain why the two images seem to emphasize different details.
    • divergent stereo??? divergent stereo is WAY harder to do than cross-eyed stereo. Many people can't do divergent without mechanical aids (especially with larger images). My mothe, who'se an optometrist thinks that it's almost impossible (compared to cross-eyed stereo)
    • I'm not ssure if they're corrrectly rotated. For stereo images like this, the horizontal line should be coplanar to the location of the two lenses used to take the picture. I'm guessing that the pictures were just chosen for the leftmost and the rightmost, but no matching rotation was done.

      If anybody knows the layout of the peobe well enough to draw the line which would be coplanar to the two lenses, I'd be happy to rotate the images (and swap them, too, if need be)

    (Just an FYI: I used to own a stereo camera (stereo realist) I've still got a thousand or so images in my archive. Since losing the camera, I've also done my own setero pairs 'the hard way', so I've gotten reasonably good at doing this)
    --
    Sometimes boldness is in fashion. Sometimes only the brave will be bold.
  19. JiggleVision some of these? by andrewbutts · · Score: 2, Interesting

    Jigglevision is a simple technique that makes it easy for even cyclopses to percieve depth in pairs of stereo images. No headaches or eye strain or anything.

    1. Re:JiggleVision some of these? by hyperstation · · Score: 2, Funny

      this is a good idea! i'm a cyclops, and i like neat pictures too.

  20. stereo blindness is quite common by mpesce · · Score: 2, Interesting

    About 10% of the population is stereo-blind, and most stereo-blind folks don't even know it. It's not really a serious disability - except in cases like this.

    1. Re:stereo blindness is quite common by jc42 · · Score: 2, Interesting

      I can vouch for the parent; my fiancee has virtually no stereo perception and functions just fine, even driving.

      Nothing surprising there. Human eyes are too close together for stereo vision to be useful past 3 or 4 meters. Past that difference, your brain generates the 3-D effect, mostly be comparing small changes over time ("sequential stero"). Driving is a good example: Close things move faster than things farther away, and things grow as you approach them. You learn to infer distances at a very early age.

      Stereo vision is mostly useful when interacting with things nearby. For example, when you're trying to pick something up. Not coincidentally, your stereo vision is best at about the distance of your hands.

      But at the distances involved when driving, humans really don't have stereo vision. Maybe if our eyes were on ends of long stalks, if would work, but not when they are only a few cm apart.

      --
      Those who do study history are doomed to stand helplessly by while everyone else repeats it.
  21. Re:Here are JiggleVision versions of those images by andrewbutts · · Score: 3, Interesting

    Wow sorry, these links actually work.
    one
    two
    three
    four
    five

  22. Try This, if your having trouble seeing stereo. by qualico · · Score: 2, Informative

    To make things easier, here is a reconstruction with instruction.

    Just sit back about 2 feet from the monitor and try to cross your eyes till you get something similar to the bottom group.

    If there is a good response to this, I'll do the others.
    Otherwise, you may be able to do them on your own after training with this:
    Stereo Image of Titan with Training bars