Scanning in the Void - A short video on good turntable setups
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- čas přidán 10. 02. 2020
- Want to polarize your Godox AR400? Buy a filter built by yours truly here: scanspace.nz/collections/fron...
Please note that this is directed towards the VFX and Games industry
This is a short lesson on how to best capture a full object. without having to mask your images.
This video was made possible thanks to Epic games Mega Grant
I got my 10 meter roll of velvet here: www.aliexpress.com/item/32762...
For more scanning related stuff, check out my social media:
www.artstation.com/shrogg
/ shrogg
scanspace.nz/ - Krátké a kreslené filmy
Thanks everyone for the fantastic comments! I have seen the demand for the Filter I made for the Godox AR400 and am glad to announce that you can now buy it here: scanspace.nz/collections/frontpage/products/ring-flash-polarizer-mount
Hello, do you plan to have new stock available for this filter ? Please let me know :D
I also would like to know wich trigger transmeter and receiver do you advice to connect the ring flash
Please cover your make for the ring flash polarizer if you dont mind sharing. Love your channel, I'll be looking forward to more sweet photogrammetry tips tricks and feats of amazement.
I love the choice of footage when talking about knowing photogrammetry in practice
Thanks for the quick explanation I'm going to scan my kid so he can 3D Print himself.
I've been using the void method for a couple of years now and it works great. I'm glad I don't have to clean my meshes or worry about it not getting captured anymore.
Iconasys has photography turntables that can automatically capture up to 8,000 images per rotation. Iconasys photography software can also remove the background automatically from all the images. Has Agisoft Metashape integration too. Makes the whole process much easier and quicker.
Congrats on the grant! I bought a couple of those flashes off your endorsement and they made all the difference, I just need to steal your 3d printed polarizer bracket now : )
Nice work, mate. Really good approach!
WOW perfectly explained. hope to see more on the future
Great video! I have been doing photogrammetry for many years as a hobby and always avoiding photogrammetry in studio because of all the cleaning it involve. But with this strategy, I might give it a try!
Iconasys has photography turntables that can automatically capture up to 8,000 images per rotation. Iconasys photography software can also remove the background automatically from all the images. Has Agisoft Metashape integration too. Makes the whole process much easier and quicker.
Great content! Just subscribed.
And BTW, your voice makes me miss NZ heaps (lived there for a few years around the far north in Kaitaia, Kaikohe, and down in Auckland).
I look forward to your future videos.
very well done ! Velvet is a very good idea ...
This is great stuff, thanks for sharing!
Wow, this is amazing.
I have been trying various methods with mixed results. I will give this a try. I am curious about the polarizing flash cover you briefly mentioned. Thanks for taking the time to share your setup.
Iconasys has photography turntables that can automatically capture up to 8,000 images per rotation. Iconasys photography software can also remove the background automatically from all the images. Has Agisoft Metashape integration too. Makes the whole process much easier and quicker.
Very nice pro tips here.
Thank you, this is very useful!
very impressive!
hey erik
awesome video and thanks for this.
i am shooting a birds nest at the moment :)
I have a question did you only use the ring light finally to shoot the object (i think the answer is yes)?
i was maybe opting to buy 2 cob-led lights like the godox lights and put a filter in front maybe with a soft box around it. would you think this could work to light the scene in a polarized manner?
thanks in advance. keep up the videos they are great
You Are The Boss!!!
Hi Erik, Your video's are very informative. Thanks for the tips. May I ask when set up you use for larger objects? Still a ring flash?
Incredible... I'm curious if you can generate any reflection/metallness maps with this technique?
Technically if you redo the all process without polarized filter you get the asset with reflection. So it's a matter in photoshop to do the difference between the polarized and the non polarized: will provide a black and white mask of your highlight. So you have specular
Great stuff Eric! Do you align the shots/angels using control points?
Hi Erik! Love your work. Would you recommend using a lightbox to shoot? I see you don't use one in this video.
Incredible !!! Great video, any advice to find a cable that connects DSLR to the Genie Mini so long? thank you for sharing...
Hi Erik, can you share your plans for the 3D printed Flash polarizer( the .stl file)? Great video, I plan on trying your technique. Great work.
brilliant!
Great video just subbed. Do you have any advice around using the technique in the video and applying it to a smaller object like a small coin. Any tips would be much appreciated.
I'm confused. You kinda of skipped over the polarizing part. How did you acquire that polarized filter for your light. I've a polarize filter for my lens, but I'm not sure how to acquire or make a filter for the light. Can you elaborate a bit on that?
Allow me to add my voice to the many folks commenting on this excellent video requesting details on the LED source light polarizer. Thanks.
Iconasys has photography turntables that can automatically capture up to 8,000 images per rotation. Iconasys photography software can also remove the background automatically from all the images. Has Agisoft Metashape integration too. Makes the whole process much easier and quicker.
*Awesome*
Hey Erik,
Thank you so much for sharing this awesome video!
Can you share some info and setup of the polarized filter light rig and where I can purchase them please?
Iconasys has photography turntables that can automatically capture up to 8,000 images per rotation. Iconasys photography software can also remove the background automatically from all the images. Has Agisoft Metashape integration too. Makes the whole process much easier and quicker.
Hey there awesome vid! RE Going from high topology scan mesh to low topo do you have any recommendations? I am not a modeller by trade :^)
Perfect! thx
Amazing work. How would you approach scaning a much smaller object? lets say 15mm diameter.
WOW TAHNK YOUUUU!!!! AAAAAAA
This is awesome and I think there could be some interesting applications in healthcare. Are you able to accurately scale the rendered 3D objects to achieve a true 1:1 size? Perhaps by including a known scale reference in the images?
Yup, scale is fairly straightforward, and will be the topic off the next video, whenever I get the time to finish it off.
@@ErikChristensensScanSpace Awesome! I Can't wait to see the next video! You make awesome content. I saw that you recommend powder contrast spray for glossy surfaces, but what do you think about scanning human teeth (either in the mouth and/or out of the mouth like removable plastic dentures), where spraying powder isn't the easiest or safest thing to do? I have tried but only had mixed results at best, but I haven't yet perfectly replicated your polarized light and black background protocols here. Thank you so much for your insights!
@@dr.andrewc.johnson652 I'm sure you've already figured it out by now but in my opinion the mouth would move around a lot and the camera angles are too restricted for normal photogrammetry. I have seen some dentists 3D scan teeth but I think they use specialised intraoral scanners instead. This tech is great for prosthetics though as denonstrated by Unlimited Tomorrow.
Hey man, absolutely insane work and great tutorial, fast and efficient. What polarizing filter are you using? I also live in New Zealand, I can't find polarizing sheet film anywhere and the Amazon sellers are dodgy at best..
you can create your own using cross polarization filter, check out dentist video on how to make diy cross polarization filter. if i send the link here yt deletes it
Hi Erik, I’m making a game on unreal and I’m getting inconsistent results mostly based on the dark edges and reality capture thinking that those edges are voids. Even when multiple angles show that it shouldn’t be. I also have alignment issues when I turn the object just like I would if it wasn’t shot in a void. I’m using a canon RP with a tamron 24-70mm cross polarized ring flash and circular polarizer. I use Lightroom to take out all the black and try to use contrast and black and white levels to eliminate the ring/edge of darkness furthest from flash but I get inconsistent results. Thank you for any advice you can offer!
Hello, thanks for the video! I do have a question though; if you are using camera settings that show no other light than the flash, what is the purpose of the softboxes? Just for filming this video, or do they also have a linear polarizing filter on them?
I was wondering if you paint you background and stand/base with black paint the true black 3.0 that absorbed all the light if that would do a better trick then velvet? I will try on my side bit maybe you already try
Brilliant video Erik and great results too!
Could you show us how you’ve created your flash polarizer? Thanks! 👍
Nevermind, I figured out: Polarizer film :)
Great video! What software do you use to import photos?
I use Reality Capture in this video
Before I go and make my own setup, are there any glaring limitations? How does this affect metals or similarly shiny surfaces? I'm guessing that I'll only end up with the diffuse but if the material isn't diffuse enough, it'll just turn black. Am I well served with this setup for something like scuffed metal where there's almost no mirror reflection to it or would it be better to get some kind of dulling spray to solve that issue?
Give it a shot, you will have mixed results with very shiny objects, but it is workable as long as the material isn't too uniform.
As you say, scuffed metal works very well.
This is an example of a really good scan coming from this setup that is chrome steel
www.artstation.com/artwork/L2LAQk
Very nice, informative and fun to watch video Erik :), thanks for sharing.. of course +1 sub from me :D
nice tutorial! I'd just like to know if you can scan the apple just as well if you shot your images orbiting around apple with the camera mounted ring light as opposed to the apple turning on a turntable like you did here.
yes, you should get an almost identical result. I feel I should have covered this in more detail, perhaps a future video will touch on freehand shooting with a camera mounted flash.
@@ErikChristensensScanSpace looking forward to it. I was wondering about this since most tutorials I've seen states the environment light shouldn't change if you are shooting around the object with the camera. But I guess if the ring light is mounted perfectly on the camera is the exception to the rule, right?
@@justinyuvilla8944 Iconasys has photography turntables that can automatically capture up to 8,000 images per rotation. Iconasys photography software can also remove the background automatically from all the images. Has Agisoft Metashape integration too. Makes the whole process much easier and quicker.
👍👍👍
How do you combat DOF issues? Even shooting at f/10 I get falloff on smaller objects. Are there anytimps or tricks for that? Thanks!
Edit: spoke too soon. You're able to rotate the object instead of the camera because of the black background. Do you think that having a background with a specific pattern might actually /help/ the software detect features and track camera position?
Iconasys has photography turntables that can automatically capture up to 8,000 images per rotation. Iconasys photography software can also remove the background automatically from all the images. Has Agisoft Metashape integration too. Makes the whole process much easier and quicker.
Would this work with a diffused/cloudy day as light source, and a polarizing filter on lense instead?
Its unlikely that the method shown in the video will work in the conditions you discribed, as the everything except for the object that is being photographed must lack detail.
I've been using a different ring flash with a polarizer I designed in cad but I noticed the flash only seems effective using the ETTL function, any reason why they could be? Manual seems to illuminate everything, even the duvytene
Did you mention which photogrammetry software is used ??
No, because that is irrelevant due to this process working for all photogrammetry solutions
@@ErikChristensensScanSpace The process yes, mais the really good result you obtain is certainly the result of using a high end software like Reality Capture. Feed your pictures in MeshRoom or Agisoft and I bet the result won't be that good (even if your workflow is really clean and precise)
@@ErikChristensensScanSpace Would you mind sharing, just for those of us who are curious?
Where did you get a big polarizer for the light?
@stylac that's not what I meant, I heard him say he made the mount, I'm asking about the polarizer itself, the material in the mount. I also have other questions about how a polarized light source interacts with a polarizer filter, and what's the point when the softboxes aren't polarized surely they still reflect, etc
@@oBCHANo
I don't want to put words in his mouth, but if I remember correctly, he purchased the material in sheets from Amazon. Here is an example www.amazon.com/Polarization-Polarizer-Educational-Physics-Polarized/dp/B06XWXRB75
Where can I find information on how to properly set-up Geine Mini II with the camera to use it as an automatic turntable?
What is the software you use that shows your passes and cloud of your object? Thank you!
Hello, my kiwi brethren - Can you point me in the direction of the specific polarising sheet that you bought, please? Happy level 4, again..
So this is working amazing on my phone, but as soon as I transfer the RAW .DNG files over, everything is exposed and I can clearly see the velvet and black pedestal that were otherwise purely invisible. Do I just batch process them once more to ensure they aren’t there when going into something like Metashape?
Because RAW images are the unprocessed versions of your images, they can bring out details which aren't seen otherwise where it is clipped by image processing. Your two options would be to use the JPGs from your camera or process the Raws after the fact. Otherwise your photogrammetry software might pickup on the background texture and ruin your alignment.
wonder if 80Ws flash in darkened room would suffice.
Hello. Do you do any shadow or highlight corrections with this type of setup? I have copied the majority of your setup an I'm an making great models so far.
Iconasys has photography turntables that can automatically capture up to 8,000 images per rotation. Iconasys photography software can also remove the background automatically from all the images. Has Agisoft Metashape integration too. Makes the whole process much easier and quicker.
What about if the object has black color? How you would change the black background?
Hey, where can I get the polariser for the lgiht?
What do you recommend when scanning a dark object? A white background?
yes
How would you photograph something long and skinny, like a bone?
hello if i want to have better 3d model quality do i need a lot of megapixels or a higher resolution ? please help me
I think you need at least a macro lens, and max megapixels and more shots. But that requires a very powerful computer
Any info on that polarisation film holder for your flash? Can I buy like 50 of them?
What about using a ring LED and not the $500 flash? Will polarization still work?
it can still work, but you will have to expose the images for a long time in comparison to the flash.
Its just not very user friendly, nor can that setup be handheld
@@ErikChristensensScanSpace thanks - I see now the difference in power between LED ring light vs flash and so I'm gonna cough up the extra $$ for the AR400 flash
Please tell me the software you are using!
Reality Capture
What software do you use for the reconstruction?
reality capture
You need to get a patent on that magnetic polarizer if you haven't already.
I probably will not be able to, at least on the version seen in the video.
I have a few other novel systems that are far better which I may file a patent on.
@@ErikChristensensScanSpace
My credit card is standing by!
FYI patents are useless and a money-sink unless you have money for expensive lawyers to defend them.
I dare you to try this void setup for scanning old medieval codex books 😂 Also black background? Yea, from my experience, that is a no no because i am using 3D Zephyr and their masking tool. Only gray works for me.
I personally think you needs little better title