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Unread 09-12-2018, 05:05 PM
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Vision during Auto

I've seen in competition where the robot has like a camera with green lights around it to detect the goal like in Stronghold. Could someone direct me to what camera is being used or any alternatives. Thanks!
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Unread 09-12-2018, 05:38 PM
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Re: Vision during Auto

The LimeLight camera sold at WCProducts.net is the way to go!
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Unread 09-12-2018, 05:59 PM
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Re: Vision during Auto

If on a budget, the Microsoft web cam from the KoP and a green LED ring will get you there for about a tenth the price, and you can get good support through screenstepslive, CD and other FIRST fora. There are cheaper web cams, but you may not be able to get as much help.
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Unread 09-12-2018, 05:59 PM
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Re: Vision during Auto

You can also "roll your own" using an LED ring like this one from AndyMark, or these from superbrightleds.com (also found in FIRST Choice).

That being said, if you can afford and manage to get your hands on a Limelight, from what I've heard it makes computer vision a much easier problem to tackle.


EDIT: sniped
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Unread 09-12-2018, 06:00 PM
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Re: Vision during Auto

The LimeLight is a great product, but it's certainly not cheap, nor for everyone. (Personally, if 2019 is heavy on vision like 2016 or 2017, we'll be considering getting a LimeLight. But not every team will be able to fully utilize it.)

If you have a programming team who enjoys tinkering with things on their own, there's nothing wrong with running a USB camera to a Raspberry Pi and making a mount for it with some space for LEDs. GRIP is really easy to work with.
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Last edited by jtrv : 09-12-2018 at 06:48 PM.
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Unread 09-12-2018, 06:34 PM
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Re: Vision during Auto

Quote:
Originally Posted by jtrv View Post
I would hope you'd disclose your affiliation with the LimeLight in your endorsements.

That said, the LimeLight is a great product, but it's certainly not cheap, nor for everyone. (Personally, if 2019 is heavy on vision like 2016 or 2017, we'll be considering getting a LimeLight. But not every team will be able to fully utilize it.)

If you have a programming team who enjoys tinkering with things on their own, there's nothing wrong with running a USB camera to a Raspberry Pi and making a mount for it with some space for LEDs. GRIP is really easy to work with.
we have no affiliation to it?

973 was lucky enough to test a Beta unit, but we like it for it's functionality... not because we were able to Beta test it.
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Unread 09-12-2018, 06:38 PM
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Re: Vision during Auto

I would definitely go with the Limelight if your team is new to vision. Getting the quality, reliability, and latency to the level of the Limelight will take significant time and effort. That time in my opinion could be better spent on developing code to make your robot actually use the vision information. It's expensive but worth it if you plan to use vision during an FRC season.
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Unread 09-12-2018, 06:48 PM
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Re: Vision during Auto

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Originally Posted by AdamHeard View Post
we have no affiliation to it?

973 was lucky enough to test a Beta unit, but we like it for it's functionality... not because we were able to Beta test it.
Ahhh shoot. I got the Greyt 973 and LimeLight 987 (I think? maybe?) stuff confused. My apologies.

The LimeLight is great. But it ain't cheap.
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Unread 09-12-2018, 06:49 PM
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Re: Vision during Auto

Quote:
Originally Posted by jtrv View Post
Ahhh shoot. I got the Greyt 973 and LimeLight 987 (I think?) stuff confused. My apologies.

The LimeLight is great. But it ain't cheap.
The LimeLight is great, but it aint GreyT.
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Unread 09-12-2018, 07:45 PM
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Re: Vision during Auto

Does anyone have an idea when the Limelight cameras will be available again?
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Unread 09-12-2018, 08:06 PM
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Re: Vision during Auto

I'm surprised to have not seen the Jevois mentioned here. It integrates the camera and processing together and is preloaded with the computer vision library openCV. It is capable of running ML algorithms as well. Since the processing is done onboard the camera, some latency can be eliminated. It provides the benefits of a limelight for much cheaper, around 50 dollars.

http://jevois.org/
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Unread 09-13-2018, 03:23 AM
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Re: Vision during Auto

Quote:
Originally Posted by deslusionary View Post
I'm surprised to have not seen the Jevois mentioned here. It integrates the camera and processing together and is preloaded with the computer vision library openCV. It is capable of running ML algorithms as well. Since the processing is done onboard the camera, some latency can be eliminated. It provides the benefits of a limelight for much cheaper, around 50 dollars.

http://jevois.org/
Jevois is significantly more complicated to use than a limelight as well, and that is where the price difference comes from.
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Unread 09-13-2018, 07:11 AM
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Can limelight be used with java coding?

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Unread 09-13-2018, 07:32 AM
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Re: Vision during Auto

I too have no affiliation to Lime Light and also were part of the Beta testers.

I suggest the Lime Light as well. The investment is steep but not wasting a lot of time with marginal success is priceless. The LL team has done a fantastic job developing a simple and fast configuration tools to many common vision problems found in FRC. If something new pops up they are quick to put out an update.

My team has used a mini PC, camera, LED rings, running GRIP, it worked but there were multiple points of failure and hours of configuration for one vision pipeline. Lime Light has minimum one POE-Ethernet connection and DONE, 9 selectable vision pipelines, and a USB port for optional driver camera. Also coming this fall I have heard it will support GRIP pipelines so if the built in vision tools can't do what you want you can export one from GRIP.

Enough Fan boying here. I suggestion to "new to vision programmers" is

Code:
While you wait for your Lime Light to get approved 
1 get a USB camera
2 install GRIP on a PC
3 run the tutorials found on screen steps for GRIP
4 now make a decision to try and 
  a create the pipeline to OpenCV code to run on the Roborio in your robot code.
  b find a co-processor to put on the robot to run either the above OpenCV or GRIP Pipeline
  c burn the network bandwidth to run the GRIP vision pipeline on your driverstation
  d get your lime light or exsplore the multiple other vision solution like using an old Android phone
Now is the time to waist trying to get a lesser solution working. If you do it during build season its too late unless it's Lime Light*.

*sorry more fan boy
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Unread 09-13-2018, 07:33 AM
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Re: Vision during Auto

Quote:
Originally Posted by Aaron Li View Post
Can limelight be used with java coding?

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The Lime Light post values to NetworkTables that your Robot Code can use to acquire a target.
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