Have you ever wanted to 3D scan a stuffed animal, or a little ceramic dinosaur, or perhaps an owl whistle? You know, to contribute to the volumetric digital repository of civilization. Well, I have good news for you - all you need is a lightbox, a cheap turntable display, a big sheet of white paper, and a phone (with camera). Or you could use an old microwave.

This rig is 10x less expensive than every monochrome 3D scanner out there - and it's in color.

Background: I was trying to 3D scan a small ceramic owl whistle* and found out that my favorite 3D scanning rig for people and scenes (the Primesense Carmine 1.09 with Skanect) couldn't do it - the whistle was too small. So I did a quick search online and to my surprise, there was nothing on the market for under $1000 that could make high quality color 3D scans of objects smaller than a basketball. I shrugged and decided to drown my disappointment with some Orville Redenbacher's popcorn. And then it hit me.

This is how to make your own Microwave -- a color 3D scanner for digitizing the small things in your life.

*The keen observer may ask, why was I was trying to scan a small ceramic owl whistle? For this project.

Step 1: Theory

A lot of people have used photo-stitching software like 123D Catch. And almost as many people think it sucks. The background always seems to get blended into the subject matter being scanned, making for terrible 3D models of small objects. The problem is, the software is designed to force the photographer to walk around the subject, leading to uneven lighting and a bunch of undesired background imagery being pulled into the final 3D model.

Quite a few folks (myself included) have naively tried to take photos of spinning objects to get around this issue - I once tried to 3D scan a turkey in a rotisserrie oven - but alas, if the background is static and the subject is rotating/spinning, photogrammetry software like 123D Catch doesn't work at all.

Turns out, the solution to this problem and the key to using photogrammetry to 3D scan small objects is to eliminate the background and all shadows with a trick photographers call the infinity wall.

It's insanely simple. And it works.

<p>Do you have a link to the led light panel you purchased? Like an amazon link or something?</p>
<p>Very wonderful idea.. :)</p><p>I only can't find a possibility to <br>load premade photos into the 123d Catch-App.. - Did they change the software or am I <br>just too ... whatever ... to find the feature.</p><p>Hoping the second possibility to be true: Please, could somebody give me a hint?</p><p>Thank you a lot*****</p>
<p>How did you make the curved face of the microwave front?</p>
Got a kit yet? Pleeez!
I want the kit
<p>May I suggest you crowd fund the kit? I'm sure it will get a lot of attention in crowd funding sites like indiegogo... You could even manage to get cross promoted by the people at 123D Catch and that would be great enterprise. If you need help getting it off the ground, let me know.</p>
<p>I want a kit! I am experimenting with making plastic replacement nibs for calligraphy pens, and so far this has meant cutting things by hand ...</p>
<p>I'm using this setup to scan and print small plastic parts for repairing stick blenders. I don't think I could have scanned them any other way as easily.</p>
<p>I'd buy kit, I'm interested </p>
<p>Amazing..! thanks for sharing </p>
<p>Is the kit available. I would be interested.</p>
<p>great instructable !</p>
<p>incredible work... </p>
<p>Awesome! i want one....and still a 3d printer to go with it....;-)</p><p>got an old microwave looking to chuck actually....</p>
<p>Nice! If more than ten people are interested I'll push to get a kit together....it's looking likely....</p>
<p>actually, another thought....LED light panels....only way i know to make them is with LED strips, and whole thing ends up abt an inch thick.....is there a better way? i have made star trek style LCARS panels and i just thinking 'fake' type computer panels in general- flexible/ bendy would be even better! ;-)</p>
<p>good show! entirely wrong time at the minute...moving house and no end going on so likely microwave will be chucked :-( but i guess follow up Q.....wd you ship to uk? ;-)</p>
Great job! The only room for possible improvement would be to use an old phone case or. 3dprinted one!
<p>Got to try this.</p>
do it, make a kit!
<p>Does this violate Amazon's patent of photography against a white background?</p><p>Oh, and great Instructable</p>
<p>Hi,</p><p>would you like to publish or sent plans in dxf format files</p>
<p>I'd totally buy a kit! I'm a jewellery student and planning on selling mostly online when I'm done school, 3d imaging would be so useful to better show people what they're looking at online... but for that I'd obviously want it in color, and as a startup I'd rather spend $1000 on a casting machine or something, lol. $100 is doable for sure, though. Let me know if you do it!</p>
<p>Thanks, will do! Just a note though, I have a feeling that shiny/reflective jewellery will be a little tricky to 3D scan with any technique, including this one. I'm experimenting with adding a polarization filter over the camera to get rid of some reflections, but the jury is still out. What type of jewelry do you make? I'll try to simulate a scan of something similar here in my lab...</p>
I mostly work in silver, with different color stones. I'd be interested in seeing a scan of some kind of highly polished metal so that I know what to expect. It doesn't really matter what it is as long as it's shiny metal.
<p>I wonder if you can put your camera on the turn table and 3d scan a room.</p>
<p>Excellent. Simple and clever. Thank you.</p>
<p>Hi Sean!</p><p>It's interesting this worked so well. Last time I used 123D (a year or two ago) they highly recommended you didn't use plain white backgrounds because it reduced photo registration points. Has this changed? Did you have any problems with using a light box for it? </p><p>James</p>
<p>Bravo !</p>
<p>Thanks, looks like something anyone with a 3D printer will want.</p><p>From the image in step 6, do you need to take shots from different vertical angles?</p><p>Could you also elaborate re &quot;Pro tip: For objects with overhangs, you'll likely need to mask out <br>each photo, which is pretty easy with a solid white background in each <br>image.&quot; - what needs masking out in relation to the overhang? The bit of the object under/behind the overhang?</p>
<p>Oh, and about Step 6 - yes, it's best to take two rounds of photos with your camera in two positions - one set straight on and one set a bit elevated. That way the topmost portion of the object shows up in the final 3D model.</p>
<p>The photogrammetry software seems to drag the white background into the 3D model if there are any complex overhangs, like in a lego castle, for instance. To get around this issue, all of the white areas on each image should be masked out/deleted (which requires a couple clicks of a mouse to select the background areas in Agisoft) for objects with holes or overhangs. Maybe this isn't always true -- experimentation continues! </p>
<p>You've answered my prayers, thanks. I would definitely be interested in a &quot;Kit&quot;. Let me know where and how you want payment, if you decide to pursue the kit. I have an Android, so I'll have to see what's available that is similar to GorillaCam for the iPhone. It looks like there are quite a few available, so I will do some research.</p><p>Two thumbs up!</p><p>Toyman</p>
<p>Sweet! I'll let you know if I pull the trigger on the kit.</p>
<p>I will take a kit, let me know. </p><p>Nice work, the mesh looks really good on the small object.</p><p>Simple and elegant solution.</p><p>Cheers</p><p>John</p>
<p>Invalid Product mate ! Link on step 6</p>
<p>Got it and fixed - thanks! For some reason 123dapp.com isn't allowing access to links without signing in, bizarrely. So I moved the model to Sketchfab.</p>
<p>I think you had the model marked as private in 123D. </p>
<p>Are you kidding? Sign me up for a kit! Saves me the trouble of adding yet another project build to the queue, especially since I ordered a MatterForm some time ago and I'm still waiting. This is a GREAT idea! Thanks!</p>
<p>I think many people would be interested in this. Good job.</p>
<p>Awesome project! I'll definitely consider this for the future. =)</p>
<p>If you don't have burst mode you can take a video and then follow <a href="https://www.instructables.com/id/Make-a-3D-Scanner-From-a-Cell-Phone-and-Bicycle-Wh/" rel="nofollow">these instructions</a> (Step 8) to make it into a sequence of jpegs (one per frame), this will give you a ton of photos so just select the ones you need.</p>
<p>It's interesting that you do exactly the opposite of what the 123D Catch page says for creating a good scan. A very bland background without any marks, spinning the model not the camera, and using difuse lighting with no shadows. </p>
<p>Thanks for the hint with Agisoft! The thing is amazing!</p>
Brilliant! I think you would find many buyers for this kit including myself!
<p>Very cool!!</p>

About This Instructable




More by sfrayne:Making of the L3D Cube: Idea to Product in 4 Months Into the Looking Glass: 3D Scanning Scenes 101 Free Range Color 3D Scanning with an iPad 
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