ExoMars |
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Guest_Sunspot_* |
Aug 25 2005, 11:22 AM
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#1
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http://news.bbc.co.uk/1/hi/sci/tech/4180840.stm
Europe has fixed on a concept for its next mission to land on the Red Planet. It aims to send a single robot rover to the Martian surface along with another, stationary, science package. |
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Guest_DonPMitchell_* |
Jun 16 2006, 07:17 AM
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#2
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It would save a lot of time and planning if a rover was even smart enough to take commands from Earth like "Turn 35 degrees and go 250 meters, avoiding obstacle".
Computer vision is notoriously unrobust. Stereo fusion (calculating a depth map from two camera views) has been around for decades, but it can be fooled by unusual textures or visibility features (something one camera sees but is hidden to the other). You definately want to believe input from cat whiskers or inclinometers more than you believe the vision algorithm, or the rover will end up driving off a cliff. You're pushing the limits of robust AI algorithms to plan a path around an obstacle and still try to reach the target coordinates. And if anything hairy happens, it should stops and call Earth for help. Recognition and path planning tasks performed routinely by a rodent are well beyond what a super computer can do today. The issue isn't processor speed, it is the primitive state of the art in AI algorithms. It's an unfortunately feature of academic AI culture to exagerate that state of the art, so be skeptical until you see a rover really doing what is promised on realistic outdoor terrain, not a white floor with colored cubes. |
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