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<html><head><title>David</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><link type='text/css' href='wiki.css' rel='stylesheet'></head><body><h1>David</h1></div>
<div id="mw-content-text" lang="en" dir="ltr" class="mw-content-ltr"><div class="mw-parser-output"><p><b>[link removed not existent]</b> is a very low cost sensor system introduced by Dr. Simon Winkelbach and Sven Molkenstruck. It utilizes a standard USB webcam and any sort of hand held laser line projector. This article is about my first impression of the sensor system and the discussion about how to integrate the data into FreeCAD.
</p><p><br />
</p>
<div id="toc" class="toc"><div class="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="#Hardware"><span class="tocnumber">1</span> <span class="toctext">Hardware</span></a>
<ul>
<li class="toclevel-2 tocsection-2"><a href="#Sensor"><span class="tocnumber">1.1</span> <span class="toctext">Sensor</span></a></li>
<li class="toclevel-2 tocsection-3"><a href="#Test_parts"><span class="tocnumber">1.2</span> <span class="toctext">Test parts</span></a></li>
<li class="toclevel-2 tocsection-4"><a href="#Setup"><span class="tocnumber">1.3</span> <span class="toctext">Setup</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-5"><a href="#Software"><span class="tocnumber">2</span> <span class="toctext">Software</span></a></li>
<li class="toclevel-1 tocsection-6"><a href="#Scans"><span class="tocnumber">3</span> <span class="toctext">Scans</span></a>
<ul>
<li class="toclevel-2 tocsection-7"><a href="#First_tryout"><span class="tocnumber">3.1</span> <span class="toctext">First tryout</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-8"><a href="#ToDos"><span class="tocnumber">4</span> <span class="toctext">ToDos</span></a>
<ul>
<li class="toclevel-2 tocsection-9"><a href="#Done"><span class="tocnumber">4.1</span> <span class="toctext">Done</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-10"><a href="#Scans_from_others"><span class="tocnumber">5</span> <span class="toctext">Scans from others</span></a>
<ul>
<li class="toclevel-2 tocsection-11"><a href="#Roberto"><span class="tocnumber">5.1</span> <span class="toctext">Roberto</span></a>
<ul>
<li class="toclevel-3 tocsection-12"><a href="#Example"><span class="tocnumber">5.1.1</span> <span class="toctext">Example</span></a></li>
<li class="toclevel-3 tocsection-13"><a href="#Hardware_2"><span class="tocnumber">5.1.2</span> <span class="toctext">Hardware</span></a></li>
<li class="toclevel-3 tocsection-14"><a href="#Software_2"><span class="tocnumber">5.1.3</span> <span class="toctext">Software</span></a></li>
</ul>
</li>
</ul>
</li>
<li class="toclevel-1 tocsection-15"><a href="#Weblinks"><span class="tocnumber">6</span> <span class="toctext">Weblinks</span></a></li>
</ul>
</div>
<h2><span class="mw-headline" id="Hardware">Hardware</span></h2>
<h3><span class="mw-headline" id="Sensor">Sensor</span></h3>
<p>I use the follwing hardware for the scan:
</p>
<ul><li>A 10€ Laser line from the hardware store</li>
<li>A 24€ Trust WebCam 640x480, 17 fps</li></ul>
<ul class="gallery mw-gallery-traditional">
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:49.5px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:LaserLine.JPG" class="image"><img alt="" src="120px-LaserLine.JPG" width="120" height="51" srcset="/wiki/images/thumb/0/07/LaserLine.JPG/180px-LaserLine.JPG 1.5x, /wiki/images/thumb/0/07/LaserLine.JPG/240px-LaserLine.JPG 2x" /></a></div></div>
<div class="gallerytext">
<p>Laserline 10€
</p>
</div>
</div></li>
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:15px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Cam.JPG" class="image"><img alt="" src="84px-Cam.JPG" width="84" height="120" srcset="/wiki/images/thumb/9/91/Cam.JPG/127px-Cam.JPG 1.5x, /wiki/images/thumb/9/91/Cam.JPG/169px-Cam.JPG 2x" /></a></div></div>
<div class="gallerytext">
<p>Webcam 24€
</p>
</div>
</div></li>
</ul>
<h3><span class="mw-headline" id="Test_parts">Test parts</span></h3>
<p>I will use follwing test parts:
</p>
<ul class="gallery mw-gallery-traditional">
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:15px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:WaWue.JPG" class="image"><img alt="" src="118px-WaWue.JPG" width="118" height="120" srcset="/wiki/images/thumb/a/ad/WaWue.JPG/177px-WaWue.JPG 1.5x, /wiki/images/thumb/a/ad/WaWue.JPG/237px-WaWue.JPG 2x" /></a></div></div>
<div class="gallerytext">
<p><i>Walter Cube</i>
</p>
</div>
</div></li>
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:22px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Band.JPG" class="image"><img alt="" src="120px-Band.JPG" width="120" height="106" srcset="/wiki/images/thumb/e/e8/Band.JPG/180px-Band.JPG 1.5x, /wiki/images/thumb/e/e8/Band.JPG/240px-Band.JPG 2x" /></a></div></div>
<div class="gallerytext">
<p>Moebius-like band
</p>
</div>
</div></li>
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:48.5px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Blade.JPG" class="image"><img alt="" src="120px-Blade.JPG" width="120" height="53" srcset="/wiki/images/thumb/c/c6/Blade.JPG/180px-Blade.JPG 1.5x, /wiki/images/thumb/c/c6/Blade.JPG/240px-Blade.JPG 2x" /></a></div></div>
<div class="gallerytext">
<p>CAD test part
</p>
</div>
</div></li>
</ul>
<h3><span class="mw-headline" id="Setup">Setup</span></h3>
<p>Here is my sensor setup for the first two test parts. It is a corner with a 90° angle and two sheets with the calibration pattern.
</p>
<div class="floatleft"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Setup_Bottle.JPG" class="image"><img alt="Setup Bottle.JPG" src="250px-Setup_Bottle.JPG" width="250" height="295" srcset="/wiki/images/thumb/5/5a/Setup_Bottle.JPG/375px-Setup_Bottle.JPG 1.5x, /wiki/images/thumb/5/5a/Setup_Bottle.JPG/500px-Setup_Bottle.JPG 2x" /></a></div>
<p><a href="https://www.freecadweb.org/wiki/index.php?title=File:Setup_WaWue.JPG" class="image"><img alt="Setup WaWue.JPG" src="250px-Setup_WaWue.JPG" width="250" height="291" srcset="/wiki/images/thumb/7/75/Setup_WaWue.JPG/375px-Setup_WaWue.JPG 1.5x, /wiki/images/thumb/7/75/Setup_WaWue.JPG/500px-Setup_WaWue.JPG 2x" /></a>
</p>
<h2><span class="mw-headline" id="Software">Software</span></h2>
<p>So far I use:
</p>
<ul><li> The DAVID sensor wizard</li>
<li> FreeCAD for post processing</li></ul>
<h2><span class="mw-headline" id="Scans">Scans</span></h2>
<p>Here are the scans I made with the sensor.
</p>
<h3><span class="mw-headline" id="First_tryout">First tryout</span></h3>
<p>This is my first tryout with the above mentioned sensor hardware:
</p>
<ul><li> <a rel="nofollow" class="external text" href="http://freecad.juergen-riegel.net/Data/ScanData1.zip">First Scan</a> with .OBJ and cleaned .STL files.</li></ul>
<ul class="gallery mw-gallery-traditional">
<li class='gallerycaption'>Impressions of my first scans</li>
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:33.5px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Bottle_raw.jpg" class="image"><img alt="" src="120px-Bottle_raw.jpg" width="120" height="83" srcset="/wiki/images/thumb/5/59/Bottle_raw.jpg/180px-Bottle_raw.jpg 1.5x, /wiki/images/thumb/5/59/Bottle_raw.jpg/240px-Bottle_raw.jpg 2x" /></a></div></div>
<div class="gallerytext">
<p>Bottle raw
</p>
</div>
</div></li>
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:33.5px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Bottle.jpg" class="image"><img alt="" src="120px-Bottle.jpg" width="120" height="83" srcset="/wiki/images/thumb/0/0c/Bottle.jpg/180px-Bottle.jpg 1.5x, /wiki/images/thumb/0/0c/Bottle.jpg/240px-Bottle.jpg 2x" /></a></div></div>
<div class="gallerytext">
<p>Bottle
</p>
</div>
</div></li>
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:33.5px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Bottle_detail.jpg" class="image"><img alt="" src="120px-Bottle_detail.jpg" width="120" height="83" srcset="/wiki/images/thumb/d/d7/Bottle_detail.jpg/180px-Bottle_detail.jpg 1.5x, /wiki/images/thumb/d/d7/Bottle_detail.jpg/240px-Bottle_detail.jpg 2x" /></a></div></div>
<div class="gallerytext">
<p>Bottle detail
</p>
</div>
</div></li>
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:33.5px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Bottle_detail_interpol.jpg" class="image"><img alt="" src="120px-Bottle_detail_interpol.jpg" width="120" height="83" srcset="/wiki/images/thumb/1/10/Bottle_detail_interpol.jpg/180px-Bottle_detail_interpol.jpg 1.5x, /wiki/images/thumb/1/10/Bottle_detail_interpol.jpg/240px-Bottle_detail_interpol.jpg 2x" /></a></div></div>
<div class="gallerytext">
<p>Bottle interpolated
</p>
</div>
</div></li>
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:33.5px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Wawue_Top.jpg" class="image"><img alt="" src="120px-Wawue_Top.jpg" width="120" height="83" srcset="/wiki/images/thumb/a/a8/Wawue_Top.jpg/180px-Wawue_Top.jpg 1.5x, /wiki/images/thumb/a/a8/Wawue_Top.jpg/240px-Wawue_Top.jpg 2x" /></a></div></div>
<div class="gallerytext">
<p>Walter cube top
</p>
</div>
</div></li>
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:33.5px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Wawue_Side.jpg" class="image"><img alt="" src="120px-Wawue_Side.jpg" width="120" height="83" srcset="/wiki/images/thumb/e/e1/Wawue_Side.jpg/180px-Wawue_Side.jpg 1.5x, /wiki/images/thumb/e/e1/Wawue_Side.jpg/240px-Wawue_Side.jpg 2x" /></a></div></div>
<div class="gallerytext">
<p>Walter cube side
</p>
</div>
</div></li>
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:31.5px auto;"><a href="https://www.freecadweb.org/wiki/index.php?title=File:WaWue_SphrerFit.jpg" class="image"><img alt="" src="120px-WaWue_SphrerFit.jpg" width="120" height="87" srcset="/wiki/images/thumb/4/40/WaWue_SphrerFit.jpg/180px-WaWue_SphrerFit.jpg 1.5x, /wiki/images/thumb/4/40/WaWue_SphrerFit.jpg/240px-WaWue_SphrerFit.jpg 2x" /></a></div></div>
<div class="gallerytext">
<p>Walter cube with sphere fit
</p>
</div>
</div></li>
</ul>
<h2><span class="mw-headline" id="ToDos">ToDos</span></h2>
<p>Here some ToDos to enable FreeCAD to easily incorporate DAVID scanner data:
</p>
<ul><li> A DAVID Workbench</li>
<li> Own hole closing filter</li>
<li> ...</li></ul>
<h3><span class="mw-headline" id="Done">Done</span></h3>
<p>The following DAVID related features are allready implemented:
</p>
<ul><li> OBJ file format import (Rev:358)</li></ul>
<h2><span class="mw-headline" id="Scans_from_others">Scans from others</span></h2>
<p>Here a list of published scans from other persons (with no warranty&#160;;-).
</p>
<h3><span class="mw-headline" id="Roberto">Roberto</span></h3>
<h4><span class="mw-headline" id="Example">Example</span></h4>
<p><a rel="nofollow" class="external text" href="http://img163.imagevenue.com/img.php?image=77510_chien_2_122_392lo.jpg">Finished model of a little dog</a>
</p>
<h4><span class="mw-headline" id="Hardware_2">Hardware</span></h4>
<p>MICROSOFT Webcam LifeCam NX-6000 USB 2.0 - 2MB pixel captor works very well in 800×600 at 30&#160;fps grey scale(no saturation), the scan is precise to 0.1 mm (180mm model)with very few noise for 82 Euros wonderful.
</p>
<h4><span class="mw-headline" id="Software_2">Software</span></h4>
<p>Only free software has been used
</p>
<ul><li> DAVID</li>
<li> <a href="http://en.wikipedia.org/wiki/MeshLab" class="extiw" title="wikipedia:MeshLab">MeshLab</a> (noise remove)</li>
<li> Scanalyse (assembly)</li></ul>
<h2><span class="mw-headline" id="Weblinks">Weblinks</span></h2>
<ul><li> [dead link removed]</li></ul>
<div style="clear:both"></div>
</div>
</div>
</div><div class="printfooter">
Online version: "<a dir="ltr" href="https://www.freecadweb.org/wiki/index.php?title=David&amp;oldid=277809">http://www.freecadweb.org/wiki/index.php?title=David&amp;oldid=277809</a>"</div>
<div id="catlinks" class="catlinks" data-mw="interface"></div><div class="visualClear"></div>
</div>
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<div id="mw-navigation">
<h2>Navigation menu</h2>
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