Reflective Tape Purpose

[MagiChau]

In the FIRST Choice there is an LED light ring you could use to reflect off the tape. http://www.andymark.com/Ring-light-f...-p/fc12-60.htm

[MysterE]

Has anyone tested how far the retro-tape will be able to 'reflect' the ring light from? (IE: From the other end of the field?)

[Rizner]

Has anyone tested it with the Kinect? I'd imagine it works well with the Kinect IR emitter (there's an emitter on the Kinect, as well as an IR camera and an RGB camera), but haven't had the chance to check it myself.

[Greg McKaskle]

I believe this is the type of lens I purchased a few years ago, wasn't too careful with my order, and wound up without an IR filter. The result was very washed out colors.

http://www.edmundoptics.com/products...productid=2196

The lens thread is I think called a 7mm lens mount. I believe the 206 lens has a 4mm focal length.

Greg McKaskle

[gnunes]

Greg-

Thanks! I had already found that page, and was guessing that it was a match. Looks like the mount is 12 mm (M12 X 0.5).

On a related topic: I would like to start my programming team with image processing, but we don't have a robot, or a practice field, or etc., etc.. But it looks to me like you have a pile of images of your test field. Would you be willing to post them somewhere in this forum or some other suitable place so we can all download and start practicing our image processing chops?

Cheers,
-Geoff Nunes

[Greg McKaskle]

Ahh, yes. I was doing that from memory and see the M12 now. As for the photos, I would like to check with the folks who that field belongs to first. In the meantime, can someone else put up photos?

Greg McKaskle

[robokiller]

I was playing around with the reflectors and the kinect and found that at any distance the reflectors appeared to be out of range on the depth finder. Is it possible that the IR emitter and receiver are just far enough apart that the IR light is reflected back to the IR emitter and not being picked up by the IR receiver.

-- Jaxon Weis

[RufflesRidge]

Originally Posted by robokiller

I was playing around with the reflectors and the kinect and found that at any distance the reflectors appeared to be out of range on the depth finder. Is it possible that the IR emitter and receiver are just far enough apart that the IR light is reflected back to the IR emitter and not being picked up by the IR receiver.

-- Jaxon Weis

The Kinect "Out of Range" can happen in both directions. Having an object too close, or washing the IR grid out with another IR source will give you "out of range" readings on the depth feed. Using OpenKinect or another package which can access the raw IR image may result in more success.

[dellagd]

Originally Posted by DjMaddius

If you use the example tracker you can easily modify it to your needs. I believe tracking will win or loose the game this year. You either auto track the entire time so you can make baskets 90% of the time or you dont track and maybe get 10% of the baskets. Its going to be a difficult feet for everyone but every year there is a win or loose situation and I believe thats this years.

Personally, we are doing complete auto tracking. Trajectory planning and all in the code. Going for a 80% scoring throw from anywhere on the field. But really this depends a LOT on the mechanical also. They have to get the thrower throwing consistently before I can do any math to predict where it will land.

I want my team heading for ghe same thing. I think it will be a must as I cant see aiming and judging distance with a human from 40 feet away is gonna be to easy.

[mikegrundvig]

I think it will be a must as I cant see aiming and judging distance with a human from 40 feet away is gonna be to easy.

This is a source of disagreement between me and one of the mentors on my team. I completely agree with you. If we had many shots to try it would be one thing but with only three balls I feel the robot has to be able to either take the shot itself, or provide distance data accurately for a human to line the shot up. I think the only way for a human to do it without serious camera assistance is if they design the bot to shoot from set positions and just work themselves into those positions. Trying to eyeball both shot angle and power from across the court is going to be very hard.

-Mike

[dellagd]

Originally Posted by mikegrundvig

This is a source of disagreement between me and one of the mentors on my team. I completely agree with you. If we had many shots to try it would be one thing but with only three balls I feel the robot has to be able to either take the shot itself, or provide distance data accurately for a human to line the shot up. I think the only way for a human to do it without serious camera assistance is if they design the bot to shoot from set positions and just work themselves into those positions. Trying to eyeball both shot angle and power from across the court is going to be very hard.

-Mike

What part of your team are you on? Programming, Drive systems or Gaming systems?

[mikegrundvig]

Originally Posted by dellagd

What part of your team are you on? Programming, Drive systems or Gaming systems?

I'm one of the mentors. This discussion came up outside the students work and just between us as we were talking about the challenge.

[Izz1324]

Can the sensor that sees the reflective tape judge the distance and height of the tape?

[CastleBravo]

Originally Posted by Izz1324

Can the sensor that sees the reflective tape judge the distance and height of the tape?

Yes, the camera (with proper image processing) can determine the distance, direction, height, etc of the vision target if the retro-reflective tape on the target is properly illuminated.

[dellagd]

Originally Posted by CastleBravo

Yes, the camera (with proper image processing) can determine the distance, direction, height, etc of the vision target if the retro-reflective tape on the target is properly illuminated.

By using the slant of its sides while looking at it from an angle? I hope that method can be accurate