3 d laser scanner

8/2/2019 3 D Laser Scanner

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http://www.instructables.com/id/3-D-Laser-Scanner/

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3-D Laser Scannerby argon on August 4, 2005

Table of Contents

3-D Laser Scanner ............................................................................................................

Intro: 3-D Laser Scanner .....................................................................................................

File Downloads ...........................................................................................................

Step 1: Position camera, laser, and cylindrical lens .................................................................................

Step 2: Position target on rotating platform ........................................................................................

Step 3: Lights, camera, action! ................................................................................................

Step 4: Process the video ....................................................................................................

File Downloads ...........................................................................................................

Related Instructables ........................................................................................................

Comments ................................................................................................................
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Intro: 3-D Laser ScannerCreate your own super hi-tech 3-D laser scanner. Using just a laser pointer, wine glass, rotating platform, and a digital video camera, you can make accurate 3-D modof an object or person.

Now on Know How! Click on the steps above for more details.

Do you like this Instructable? Then check out episodes one , two , four , five , six , andseven !

File Downloads

timsmom4.stl (11 MB)[NOTE: When saving, if you see .tmp as the file ext, rename it to 'timsmom4.stl']

Step 1:Position camera, laser, and cylindrical lensAlign the laser so that its beam passes through the cylindrical lens, creating a vertical line rather than a point, and projects onto your target. Initially, the lens was the sof a wine glass, but in this picture I use a cylindrical piece of acrylic. Position the video camera at a small angle (~15 degrees) from the laser.
http://www.instructables.com/files/orig/FS3/S4ZH/F7DWQU40/FS3S4ZHF7DWQU40.tmp?utm_source=pdf&utm_campaign=fileshttp://www.instructables.com/files/orig/FS3/S4ZH/F7DWQU40/FS3S4ZHF7DWQU40.tmp?utm_source=pdf&utm_campaign=fileshttp://www.instructables.com/files/orig/FS3/S4ZH/F7DWQU40/FS3S4ZHF7DWQU40.tmp?utm_source=pdf&utm_campaign=fileshttp://www.instructables.com/files/orig/FS3/S4ZH/F7DWQU40/FS3S4ZHF7DWQU40.tmp?utm_source=pdf&utm_campaign=fileshttp://www.instructables.com/id/E4TUFW2VPZEP4HCVDP/http://www.instructables.com/id/E1ZSYTGJ9NEXCFLZ64http://www.instructables.com/id/EGF6OU1EIGEP4HCZUE/http://www.instructables.com/id/EZETHSWF1B3RB5H/http://www.instructables.com/id/EK6MHDQF0LKLKD3/http://www.instructables.com/id/E8UBD2SNKXEP2864W9/


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Image Notes1. Laser pointer. Use a green laser if you want it to look cool, although any color will suffice.2. Video camera. Position the video camera at approximately a 15 degree angle to the laser.3. This is the cylindrical lens. Originally, I used the stem of a wine glass, but eventually, I upgraded to an acrylic rod.

Step 2:Position target on rotating platformCreate a platform which rotates at a constant angular velocity. Record players, for example, are perfect for small objects. Position your target at the center of rotation.

And make sure your target closes her eyes!

Step 3:Lights, camera, action!Turn off the lights. To make the image processing easier, it's very helpful to get the room as dark as possible so that only the reflected laser light is visible. Rotate youtarget at a constant angular velocity. Record the video. Notice how protruding features displace the laser line.


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Step 4:Process the videoConvert the video to an avi. Use an edge detection algorithm to find the location of the laser line. Reconstruct your 3-D model. I've included an early, uncommentedMATLAB script, which was used to generate this image.

File Downloads
http://www.instructables.com/files/orig/F4N/GNXL/F4NIBB68/F4NGNXLF4NIBB68.tmp?utm_source=pdf&utm_campaign=files


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KnowHowScanner.m (4 KB)[NOTE: When saving, if you see .tmp as the file ext, rename it to 'KnowHowScanner.m']

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Comments

50 comments Add Comment view all 170 commen

Jar Sqwuid says: Dec 12, 2011. 7:20 AM REPI don't suppose there's a version available for mac xD Oh well. Project for when I get home. Does it matter what color the laser light is? I imagine it ispossible to get the entire head with a full rotation, given the hair is tied up nice and tight. Also, do very sharp and sudden protrusions interfere with theinterpretation? Say... the scythe arm of a tyranid model lol

ddalleinne says: Dec 12, 2011. 2:37 AM REPive been researching this quite a bit..but i am stil wondering if u can rotate the object your scanning while keeping the laser and cam in the same place ,whuseing the david scanning software....ive got a blue line adjustable focus laser and a monochrome cam on order, and wondering if i should be building aturntable setup.....i want to put it into the ultimaker clone im building so u can scan and print in the same box...!!!

im3733 says: Dec 12, 2011. 7:02 AM REPIn theory, this would work regardless of which item was doing the actual rotating, so long as the direction is correct according to what the software islooking for.

After all, rotation is completely relative, without a static reference point, (which this does not have/use) there is no way to tell which item is rotating.Hence the reason the universe was once thought to be geocentric, there was no reference point to know what orbited what.

im3733 says: Dec 12, 2011. 7:11 AM REPAfter rereading your post, I think you might run into some issues with the polar to Cartesian plane conversions, unless you plan to clean up the mod

manually between the scan and print functions.

Also, if you plan to scan in the same place you print, you would probably need a pretty sophisticated printing/scanning bed for it to support bothCartesian movement and polar rotation.

Of course, if our rinter is olar, then ou have nothin to worr about.

Moo_cow says: Mar 5, 2011. 12:51 AM REPCould ou ust use a laser level since it alread makes the beam a vertical line, or does it have to be reen?

ddalleinne says: Dec 12, 2011. 2:32 AM REPweb cams have 50% of the sensors green 25% red 25 % blue....so green gets you more pixels...but your best bet is a monochrome cam and a bluelaser (due to extreemly thin line compared to red or green). ive seen scans of the surface of a penny with that kind of setup and the david software , thwere incredible.

roguebard1 says: Sep 22, 2011. 8:59 AM REPThe link for the executable software on the Know How Show site is either not there anymore or gone completely. Could we get a link for that file placed in tcomments section here or a link for another good 3D Scanner software? Thanks.

regijin says: Sep 20, 2011. 3:26 AM REPvery very ineresting ,how to make it?
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bears0 says: Aug 23, 2011. 6:23 AM REPEVERYONE, if you want software that does this, go here: http://www.david-laserscanner.com/

eng_iezzat says: Aug 18, 2011. 9:30 PM REPthanks very inerestingplease send matlab code my emailen [email protected]

ampeyro says: Aug 17, 2011. 2:36 AM REPdo you know of any alternative software?

i don't find the link to the one from matlab(and it lso looks so old and complicated)

yangjun1222 says: Aug 4, 2011. 12:49 AM REPCould u pls give more calculation methods on this project? i.e some principlesbehands, it is not easy for me

rohanbd says: May 3, 2011. 5:52 AM REPsomebody plz send me the code or matlab script at [email protected]

v.navaneethakannan says: Mar 12, 2011. 3:42 PM REPI couldn able to download the scri t...Kindl hel me out ls

grcan says: Mar 25, 2011. 1:39 A(removed by author or community request)

Arulsoban says: Apr 28, 2011. 8:33 AM REPBuddy can u please send me to?mail address : [email protected]

mayhy006 says: Apr 7, 2011. 6:03 AM REPHi Grcan, I am so interesting about you project, can you e - mail me your matlab [email protected] you

congnguyen13 says: Mar 27, 2011. 12:05 AM REP

send it to me, please! My e-mail: [email protected] a lot!

ILOV E_CLASSBELLE says: Apr 16, 2011. 7:12 PM REPCan anyone do some sweet things to me ?I have searching on the net over 30 hours.I am from China,maybe you have hear it before,reading in English israther hard for me.So i sincerely hope anyone to send the C++ code for 3D leaser scanner to [email protected],many,many,many,many,many thanks!

mayhy006 says: Apr 7, 2011. 8:08 AM REPcan anyone send me the matlab code or c++ code for 3D laser [email protected]

congnguyen13 says: Mar 27, 2011. 12:09 AM REPI don't know which software is used?

ronibar02 says: Jan 6, 2011. 1:14 AM REPHi Argon,I am looking for a scanner for scanning the bottom of the foot, and use the digital data to carve insoles with a cnc system.Can you help with that?

greenjedi says: Feb 8, 2011. 5:33 PM REPMaybe you could make a mold of the foot and then scan the mold?
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grcan says: Jan 19, 2011. 12:00 PM REPWhen I use this script in Matlab, to give message "Undefined function or variable 'laserColor"How can I use tihs script ? Thanks

v.navaneethakannan says: Nov 15, 2010. 11:49 AM REPFabulous work! I am involved in creating a low cost 3D scanner for physically challenged ( bio medical application ) can some guys help me out in carryingout.. lease..

tanmaysane says: Oct 31, 2010. 8:24 AM REPItz indeed an awesome concept.I am trying to make such a scanner myself.cud u plz help me wid the basic matlab source code. As in from where can Idownload the matlab code?

rvillamil says: Sep 30, 2010. 2:58 PM REPHi I know very little of MATLAB but I want to know if you could explain me how to use it. How do I call the function that throws me the 3D image of my scan

thank you

rvillamil says: Sep 27, 2010. 9:04 AM REPHi everyone, this is really cool, I have used David-laserscan and it pretty sweet.Does anyone know how to scan big Objects, does it need Calibration patterns?Does anyone know how to scan by moving camera and laser, for example scanning big objects.

Thanks!

write back!

tinkerman92 says: Aug 30, 2010. 7:31 PM REPif u wanna save the trouble of building a rig to make a l ine of the laser u can simple buy a lined laser diode l ike this 1 herehttp://www.dinodirect.com/red-laser-module-focused-line-5mw/AFFID-15.html

garninja says: Sep 14, 2009. 1:20 PM REPwhat file do you download on http://www.david-laserscanner.com/

badideasrus says: Aug 29, 2010. 1:43 PM REPDAVID_Setup_2_5_5.exe on the downloads page.

boyankir says: Sep 11, 2009. 1:14 AM REPhttp://laserpointerpen.net/58-50mw-green-laser-pointers-ir-fliterThanks for sharing this great tutorial,I just bought a 50mw green laser pointer from and dec

to do it myself.

smtgr14 says: Oct 3, 2009. 9:56 PM REPSo i have all the hardware, but what software do i get??? MATLAB is wayyyy too much and i'm just a teen so some sort of freeware would be nice.

badideasrus says: Aug 29, 2010. 1:43 PM REPdavid 3d. its free, the assembler program (what puts the peices of the mesh togeter) isn't. for that, use meshlab.

Ma3oud says: Dec 2, 2009. 1:01 PM REPhi guys!i read all comments and all steps.1-what's your meaning from "edge detection algorithm"? is it kind of video filter or effect? how and with which software i can do so?2-how can i import this video file (avi) into matlab? and how use the .m file you have attached?

TNXS ALOT

badideasrus says: Aug 29, 2010. 1:42 PM REPif i'm readin this right, matlab IS the detection algorithm..... david 3d works just as well, and it's free.

eyebot117 says: Feb 9, 2010. 4:09 PM REPVery clever! One specific way to improve however, would be to use a mirror on a small DC motor. It would spin the mirror creating a straight line with thebeam. The only thing of concern with this method would be vibrations from the motor distorting the line. Can red be used for the color of the laser?
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8/9


badideasrus says: Aug 29, 2010. 1:40 PM REPif this thing works like david 3d, then technically you could use a regular lightbulb and a shade that lets through a line. would work the same as a lazerline, just be harder to focus....

zephyrr says: Feb 14, 2010. 8:07 PM REPIs there a way to use this for full body models? I want to be a game designer and I think this would be great for character models.

badideasrus says: Aug 29, 2010. 1:38 PM REPi thought the same thing. there are some problems though. useing a 3d scanner on living things requires both a very wide beam, and a person very goat standing still. also, it's not as easy to set up a 3d scanner as it sounds. i never got mine to work (i was using david 3d, though, free, supposedly easy

to use, no programming needed (i also didn't try that hard....)) it would be easyer to make things out of clay and then scan them, if u have a sculptingtalent. or toys (like models for home train tracks. u can get anything from plants to animals to everyday objects for a train set....) been told to use meshto combine the mesh peices....

MdP1632 says: Mar 12, 2010. 9:12 PM REPI don't see why it couldn't be used as it is to create full-body models. If you need the beam to be longer when it is shined through the glass tube or dowor wine glass or whatever you use, try using something of a different width.

le Cauchemar says: Aug 3, 2010. 4:21 PM REPNice idea, just had to make my own :) The focus for me was on writing the software by myself, which took some hours ^^ Here you can see my first try witha er shi :D

ghostrider2 says: Jun 16, 2010. 6:18 AM REPhow can i convert the file into a format that can be used with 3ds max?

danielemur says: Apr 15, 2010. 5:04 PM REPWould www.osalt.com/matlab , htt ://www.scilab.or /orhtt ://sci .or / work in lace of matlab?

Bear Enthusiast says: Dec 22, 2009. 6:58 PM REPDoes anyone know how to get MATLAB to export a file that can be converted to an .stl, and if so:how?

snaut says: Mar 20, 2010. 7:58 AM REPhi, i wrote a script to export files to openscad, which itself can export to .stl, i'll upload it sometime soon.

zhanat says: Nov 19, 2009. 8:54 AM REPHi!I have a problem with Matlab. Anybody, can you help me?....m = aviread('polygon.avi', calFrame);....??? Error using ==> aviread at 53polygon.avi does not support the 'Index' parameter.

Error in ==> KnowHowScanner at 61m = aviread(' ol on.avi', calFrame);

bardon08 says: Sep 26, 2007. 7:37 PM REPWhy not use a laser level with a line lens? It would make for a higher quality model because there would be a thinner line, which would make for moreprecise measurements.

stevie1 says: Jul 29, 2008. 8:07 AM REPthats what i was thinking, and i'm pretty sure that laser levels have a threaded thing in the bottom to hook up a tripod to them.
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9/9


bardon08 says: Sep 15, 2009. 10:11 AM REPyeah, the one i have does

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