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-   -   <R31> Experienced Opinions Needed (http://www.chiefdelphi.com/forums/showthread.php?t=43462)

Carol 08-02-2006 09:37

Re: <R31> Experienced Opinions Needed
 
Quote:

Originally Posted by Rombus
Actually, last year a vision target was green, much closer to the ground, and was painted. Moes bot still had some green:
http://www.moe365.org/specs.php

This year, i dont see why it would be different, because the light is in the air, and its an actual light, not paint. Plus, you can always limit your camera from looking at the ground

MOE recently tested the camera with a team shirt, and the camera did NOT pick up on it. The shirt was put right next to the light, in various positions, and the camera immediately went straight to the light each time.

Al Skierkiewicz 08-02-2006 09:55

Re: <R31> Experienced Opinions Needed
 
Dave,
As you have seen, the consensus is the green light would be illegal. But attacking this from a different direction, the green tubes are very fragile and would likely break if placed on a robot. If another robot is designed to seek out and shoot at a green light, than you are inviting a lot of balls to be shot at your robot, possibly disabling or damaging your bot or again, breaking the light. Finally, a team with that range on their camera could simply put a shade in front of the camera to have it "see" only green lights above a certain height thereby eliminating your strategy completely. As you can see, fully thinking through the problem will yield reasons against particular strategies even when they are legal. It is what most teams will do during the design process to get to the best design they can. Prototyping helps as well.
You are not the first rookie to come up with ideas that go against the mainstream or violate the rule book so don't feel bad. Thanks for getting this clarification before ship where eventually an inspector would have the distasteful task of asking you to remove it. Ask anything anytime.

Rombus 09-02-2006 04:02

Re: <R31> Experienced Opinions Needed
 
Quote:

Originally Posted by Carol
MOE recently tested the camera with a team shirt, and the camera did NOT pick up on it. The shirt was put right next to the light, in various positions, and the camera immediately went straight to the light each time.

Good to hear! Moe always seems to be ontop of things like this. I guess that light is just too good of a target! Hope you didnet mind me using you as an example. :D

phrontist 09-02-2006 09:26

Re: <R31> Experienced Opinions Needed
 
Quote:

Originally Posted by Rombus
Good to hear! Moe always seems to be ontop of things like this. I guess that light is just too good of a target! Hope you didnet mind me using you as an example. :D

This depends hugely on how the camera was configured! I've seen your shirts before (very hard to miss) at capital clash, and I think you may have problems if your drivers were wearing them. That said, programmers should really be ignoring things below a reasonable height.

KenWittlief 09-02-2006 09:35

Re: <R31> Experienced Opinions Needed
 
Quote:

Originally Posted by phrontist
That said, programmers should really be ignoring things below a reasonable height.

that is the problem. To get the maximum triangulation on the light the camera needs to be at floor level, looking up at an angle (if you want the camera to measure distance + direction to target).

The program assumes the light is at the proper height. If it locks onto something else, the decoy could be at any height, and the tracking system would have no way of telling the difference.

Tim Delles 09-02-2006 09:41

Re: <R31> Experienced Opinions Needed
 
Here is the rule again.
Quote:

<R31>: No devices or decorations are permitted on the robot that are intended to jam or interfere with the operation of the vision system (i.e. changing robot color to confuse opponent's vision system).
Here is what you want to do.
Quote:

Our team is considering mounting a couple of the green cathode tubes to the front upper portion of the robot, so that while on defense, this light will distract or confuse the opposing team's shooters.
Now notice that in the rule it states that no device or decorations are allowed to interfere with the vision system. And you say in what you want to do that you want to interfere with the vision system. So by looking at the rule it is very clear that this will not be allowed.


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