DIY and Entry-Level 3D-Scanner Forum

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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Bernhard
www.virtumake.com

Wow! cool link

Do you have experience with this system?

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Bernhard
www.virtumake.com

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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Bernhard
www.virtumake.com

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.

Seems we have a new goal Could this be done with webcams?

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Bernhard
www.virtumake.com

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.

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

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

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!

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