Dear DAVID Community,

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DIY 3d scanner - suggestions for

DIY 3d scanner - suggestions for

Postby Anti » Sun Oct 05, 2014 10:56 pm

Hi,

I play with the idea to build an own 3d scanner with multiple cams which should record coloured (textured) scans within 1 second or less time. Thus, I'd like to ask all the experts in this forum which hardware they can recommend for such a purpose.
* Which factors in general limit the scan speed?
* Which types of cams can you recommend - with which specifications?
* Is the frame rate of the cam the limiting factor?
* I assume the aim (scanning under 1 s) can only be acchieved using USB 3 connections. Could it also work using USB 2?
* How important may be computer properties (graphic board, memory, etc.)?
* Which projector can you recommend and which characteristics should they meet?

Thanks in advance
Anti
Anti
 
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Joined: Sun May 11, 2014 9:20 am

Re: DIY 3d scanner - suggestions for

Postby NARMELLA » Wed Nov 05, 2014 4:30 pm

Hi Anti,

It is very good that you want to Speed ​​up the process of scanning. :D
David has some options to do this; like using "Speed" option in structural light column or reducing the value of "Noise Reduction " in advanced settings and ...
But i don't want to suggest you to use them . Because you will loose precision and details of scans.
Seems David laser scanner is limited to use a camera with frame rate up to 60 FPS.
And seems the programming algorithm of david is to capture a frame of a pattern , Processing and going to the next frame.

It would be good that developing team of david change it to do this algorithm in 3 operations :
1- Only capturing images of patterns for first operation.
2- Calculating and showing a rough scan result for second operation.
3- Calculating final scan result.

By using a combination of operations 1 & 2 ; this will speed up scanning process .

But for your idea it is good to use image grabber.( Lets call it "USING PRECAPTURED IMAGES ")
Unfortunately In this way , you have to spend more time for capturing images . And you can solve this problem only by writing a simple program to do it in less than a second .
Then those images will be ready to use in image grabber.

Good luck
NARMELLA
Data projector : NEC VE 281
Camera(s) : Canon eos 600D (3x)
Software : Lets scan 2.5 + David laser scanner 3.9
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