Seems we have a new goal
Could this be done with webcams?
| DIY and Entry-Level 3D-Scanner Forum http://www.diy3dscan.com/ |
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| Agisoft PhotoScan http://www.diy3dscan.com/viewtopic.php?f=40&t=38 |
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| Author: | virtumake [ Sat Mar 30, 2013 3:37 pm ] |
| Post subject: | Agisoft PhotoScan |
This software renders a 3D-model from photos of your object on your computer http://www.agisoft.ru/products/photoscan/standard/demo/ Price for the Stand alone license USD 179 |
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| Author: | virtumake [ Fri Apr 26, 2013 1:20 pm ] |
| Post subject: | Photoscan |
Wow! cool link Do you have experience with this system? |
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| Author: | virtumake [ Fri Apr 26, 2013 1:25 pm ] |
| Post subject: | Re: Agisoft PhotoScan |
The company "Infinite-Realities" built an awesome scanner system based on Photoscan (@ nicorama: Thank you for the link). Check this out: http://ir-ltd.net/ |
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| Author: | Scantastic [ Fri Apr 26, 2013 2:09 pm ] |
| Post subject: | Re: Photon 3D Scanner |
Infinite Realities does amazing work. Photogrammetry is the only was to capture super-high detail in an instant, with no worry about subject movement. However, it requires 70-100 quality SLR cameras, mounting, lights and know how. The budget is huge. This is my ultimate goal however. |
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| Author: | virtumake [ Fri Apr 26, 2013 2:22 pm ] |
| Post subject: | Re: Photon 3D Scanner |
Seems we have a new goal Could this be done with webcams?
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| Author: | Scantastic [ Fri Apr 26, 2013 2:35 pm ] |
| Post subject: | Re: Photon 3D Scanner |
Not at 10+megapixel per cam. However, beggars can't be choosers. Would reduce the cost by as much as a fifth. I will ponder the idea myself. |
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| Author: | sambo3D [ Thu May 23, 2013 10:13 am ] |
| Post subject: | Re: Agisoft PhotoScan |
I begun making some tests with my Canon 5D Mark II, using both jpeg low quality and RAW files. Photoscan works very well with raw material. The thing is that, as said, there is a lot of know how which I do not know how... For example, the lighting: how to properly light an object? I can not afford more than 1 camera right now, so, I am using one camera and moving around my object. I tried using natural light, I discovered that it is very important not to have too overexposed parts or too underexposed ones. It must be even, I think. Then, you must not use a ring flash, as it flattens all the shadows, and I think that no shadows means no depth. Does it sound right? Maybe using a big amount of reflected light within a room would be great... what do you suggest? I am going to use white umbrellas and move around my objects of desire 
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| Author: | kiesel [ Fri May 24, 2013 10:18 pm ] |
| Post subject: | Re: Agisoft PhotoScan |
Hi sambo3D, of course you can use a ringflash, you don't need shadows at all, in shadows the program can't see anything. But photogrammetry and especially this sort of photogrammetry (SFM = structure from motion) need same light conditions between different photos, so a light tent is perhaps the better choise for your object. Certainly you should avoid any moving speckles, caused by a flash. Btw. I have seen a phantastic model of a very long cave shooten with a point-and-shoot outdoor camera and a ringflash  .Cheers, Karsten |
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| Author: | sambo3D [ Sat May 25, 2013 8:38 am ] |
| Post subject: | Re: Agisoft PhotoScan |
Thanks Karsten, as I infer, the ideal result is a model with no shadows, so that I can put my desired light on it... Interesting, I infer that a homogeneous diffused white light is the best. In terms of exposure: 1 stop down is already considered "shadow"? -2 steps is hell? never go above 1? I would say, always remain around +1/3 - +2/3. Thanks! |
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| Author: | kiesel [ Sun May 26, 2013 11:57 am ] |
| Post subject: | Re: Agisoft PhotoScan |
Yes, homogeneous diffused light (it hasn't to be white, only for texture) is the best! The image quality stands at first place! In avaible light, with hard contrasty light you can also use HDR techniques to improve your image and use these images in Agisoft Photoscan. Cheers, Karsten |
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