Author Topic: Lidar Build  (Read 807 times)

Offline David Cambridge

  • Jr. Member
  • **
  • Posts: 12
Lidar Build
« on: May 02, 2018, 03:06:27 AM »
Hello All

This week, and after about 4 months of weekends, I finally got the first rendered images from my Lidar project.  If you donít know about Lidar, they can produce 3D scans and work a bit like radar but use beams of infra-red light instead of radio waves.   

Iíve now got a few hundred hours of footage to edit down to make the build video, but for now here is a demonstration.

https://youtu.be/6_2B-I4BBPA

David

Offline David Cambridge

  • Jr. Member
  • **
  • Posts: 12
Re: Lidar Build
« Reply #1 on: May 02, 2018, 03:08:27 AM »
Here is a picture of the scanner

Offline David Cambridge

  • Jr. Member
  • **
  • Posts: 12
Re: Lidar Build
« Reply #2 on: May 02, 2018, 03:12:37 AM »
Here is picture the scanner has built up.  Take a look at the YouTube link above for a  rendered video where I move through the captured 3D world.

David

Offline Joules

  • Hero Member
  • *****
  • Posts: 1029
  • Country: gb
Re: Lidar Build
« Reply #3 on: May 02, 2018, 04:49:47 AM »
Very nice David, what level of precision are you getting in the point cloud ?

I wish this had been available years ago, modelling marine interiors for refit you had to be a contortionist surveyor, using a single laser measure, and it took hours.  How fast are the scans ?
Just get doing and make swarf, you can decide what its going to be later.   :thumbup:

Offline David Cambridge

  • Jr. Member
  • **
  • Posts: 12
Re: Lidar Build
« Reply #4 on: May 02, 2018, 05:31:16 AM »
Hi Joules

Iíve used the Garmin Light V3 module, and the data sheet claims update rates up to 650 Hz with the trade-off between accuracy and speed.

Iíve not done much experimentation with configuration parameters, but out of the box I think I was getting about 120 points per second with a flutter of around  plus\minus 3 cm on a wall 2 m away. In terms of scan speed, itís really whatever you want, with the compromise between resolution and capture time.   

David

Offline Joules

  • Hero Member
  • *****
  • Posts: 1029
  • Country: gb
Re: Lidar Build
« Reply #5 on: May 02, 2018, 06:23:00 AM »
Wow, I had no idea the sensors had got that cheap.  I saw a demo years ago and the package was tens of thousands of pounds at that time.   I will be watching this with interest.
Just get doing and make swarf, you can decide what its going to be later.   :thumbup:

Offline David Cambridge

  • Jr. Member
  • **
  • Posts: 12
Re: Lidar Build
« Reply #6 on: May 21, 2018, 05:24:35 PM »
Iím still working on the build video, but this weekend I thought Iíd take the Lidar outside and try it out in the garden. Here is a quick video of the results.


Online awemawson

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 6362
  • Country: gb
  • East Sussex, UK
Re: Lidar Build
« Reply #7 on: May 21, 2018, 05:39:27 PM »
All I can say is . . . . . AMAZING . . . :thumbup:

Andrew Mawson
East Sussex

Offline Brass_Machine

  • Administrator
  • Hero Member
  • *****
  • Posts: 5266
  • Country: us
Re: Lidar Build
« Reply #8 on: May 21, 2018, 08:51:07 PM »
All I can say is . . . . . AMAZING . . . :thumbup:

Agreed. That is pretty cool.
Science is fun.

We're all mad here. I'm mad. You're mad.