![]() ![]() ![]() In the middle is the webcam and to the right the two A4 cardboard grids put at a 90 degree angle. On the LCD screen of my laptop you see a preview of the 3D scan with the pixeldata directly mapped to the polygon object. To the left you see an external CRT monitor that is attached to my laptop on which we can see the DAVID scanning software. This is a photo of the simple setup at my desk at home. Also be sure you can control the lighting situation in the room, any variation results quite quickly in bad scans. As the instruction mention, keep in mind to put all the automatic lighting settings off. And so we did find a laser-level for € 3.79 (including batteries)! The quality of this laser is of course pretty bad, but for a first test actually surprisingly useful! Point is that you need a line and NOT a dot laser.įirst you need to calibrate the camera, we used a Logitech Connect webcam at a resolution of 640×480. Because ordinary lights have a very diffuse beam you end up having not a sharp contrasting shadow line at all.Īfter going to an electronics shop we where advised to go to a hardware store and look for a cheap laser-level. But it is simply impossible to do that with lights that you may find in your house. For this you need a focused spotlight that can beam a sharp contrasting edge between light and shadow. But we couldn’t wait for this laser to arrive so we tried the option to work with the ‘Thin shadow line option’. The laser however was not such an easy thing to come by, so we ordered a cheap laser from a webshop that was advised on the DAVID-forum. Also setting up the webcam was no problem (after downloading the latest drivers). Printing out the A4 patterns and putting them on cardboard was done in a few minutes. Then we followed the very simple instructions. So we downloaded everything and bought a license for Shapefusion. Wahl at the Institute for Robotics and Process Control, Technical University of Braunschweig, Germany and was published as a paper at the German Association for Pattern Recognition. ![]() Simon Winkelbach, Sven Molkenstruck and Prof. The concept of DAVID has been developed by the computer scientists Dr. So everyone can use it to scan objects without high costs this is the big advantage over commercial solutions which are rather expensive. a webcam), a background corner, and a laser that projects a line onto the object you want to scan. All you need to build a 3d scanner is a PC, a camera (e.g. “DAVID-Laserscanner is a freeware software for 3d laser range scanning. The Laserscanner software is free and published under the GPL, DAVID Shapefusion can be bought for a very modest price. DAVID consists of two programms: DAVID Laserscanner and DAVID Shapefusion. Based on the software called DAVID we got inspired for the Bodyscan concept. ![]()
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February 2023
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