Openmv cam & Rover race (@diyrobocars)

[Michael Shimniok]

From twitter:

Autonomous vision-based rover w/ @OpenMVcam doing practice run at @diyrobocars race this weekend. $80 of gear [YouTube link]
https://t.co/Nt1kaFeQHT

(https://twitter.com/diyrobocars/status/848969787682181120?s=03)

[Ted Meyers]

That was impressive!  It's not easy doing optical stuff outside.  That being said, they did have a nice wide and bright white line on asphalt to follow.  I do like the OpenMVCam for this type of thing. I've seen demos doing stuff like boxing left/right areas based on grayscale.  I imagine this is how one would do line following -- or in this case, keeping the line on the left side of the vehicle.  It wouldn't be hard to extend this technique to obstacle avoidance; just avoid lighter colored areas from getting in the front/center.  Assuming that the light colored regions are not pavement.

Ted

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[jesse brockmann]

anyone know where to get the code, or which OpenMV it was?  It would be cool to tweak to run down middle instead along one of the outside lines. ;)

JesseJay

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[Jon Watte]

If it separates white lines from gray pavement along some particular horizontal slice, the code wouldn't be that hard...

Maybe I should put my openmv on one of my chassis and try it :-)

JW

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[Ted Meyers]

I know that the OpenMV IDE comes with a line following example.  I suspect that it would have to be modified somewhat.

On Tuesday, April 4, 2017 at 9:21:57 PM UTC-6, JesseJay wrote:

anyone know where to get the code, or which OpenMV it was?  It would be cool to tweak to run down middle instead along one of the outside lines. ;)

JesseJay

On Tue, Apr 4, 2017 at 11:52 AM, Ted Meyers <ted.m...@gmail.com> wrote:

That was impressive!  It's not easy doing optical stuff outside.  That being said, they did have a nice wide and bright white line on asphalt to follow.  I do like the OpenMVCam for this type of thing. I've seen demos doing stuff like boxing left/right areas based on grayscale.  I imagine this is how one would do line following -- or in this case, keeping the line on the left side of the vehicle.  It wouldn't be hard to extend this technique to obstacle avoidance; just avoid lighter colored areas from getting in the front/center.  Assuming that the light colored regions are not pavement.

Ted

On Mon, Apr 3, 2017 at 4:13 PM, Michael Shimniok <shim...@gmail.com> wrote:

From twitter:

Autonomous vision-based rover w/ @OpenMVcam doing practice run at @diyrobocars race this weekend. $80 of gear [YouTube link]
https://t.co/Nt1kaFeQHT

(https://twitter.com/diyrobocars/status/848969787682181120?s=03)

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[JesseJay]

I've been looking at OpenMV stuff again.  Saw the following with the latest code from July DIYRoboCars event

https://openmv.io/blogs/news/linear-regression-line-following

Pretty awesome!

[Ted Meyers]

Ooh, that is awesome.  Too bad there isn't more of a line to follow on the avc.

[Jon Watte]

Yeah, lines are pretty awesome :-)

I'm hoping the edges between hay bales and track will be sufficient.

JW

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[Jon Watte]

Btw, the guy who placed third at diyrobocars was Kwabena, the IDE guy from OpenMV. Using OpenMVCam M7, of course :-)

His approach is to find lines, and then running "robust linear regression," meaning he detects the local gradient of all pixels and fuses them. I guess there are cycles enough on the M7 for that!

Sincerely,

jw

Sincerely,

Jon Watte


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"I find that the harder I work, the more luck I seem to have." -- Thomas Jefferson