| Coin in 3D from a texture [message #43433] Sat, 04 February 2012 04:15 UTC |
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Im looking for someone that could take an of the front and the back of a coin and create a shapeways ready 3d file for me.
I basically want the detail in the images of the coin to show up as corresponding ridges in the coin.
[image used as example]
have actual image at higher resolution for a going measuring 19mm.
Regards
Eduardo
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| Re: Coin in 3D from a texture [message #43435 is a reply to message #43433 ] Sat, 04 February 2012 06:13 UTC |
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I would suggest trying a program such as 123dCatch (www.123dcatch.com).
For any of such programs to work, you need high-resolution pictures from a couple of different (close) angles such as a stereoscopic pair of photos.
Patience, Persistance, Politeness - the 3Ps will help us get us to Perfect Printed Products
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| Re: Coin in 3D from a texture [message #43475 is a reply to message #43435 ] Sun, 05 February 2012 08:00 UTC |
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That's a tricky one.
I've used 123DCatch for capturing maquettes at work. Maybe it'd work with a lot of messing about, but I don't think it or any similar image based model generation softwares would really be anywhere near sensitive enough to capture the fine detail on a coin and turn it into geometry. Your best best would be trying to get a very neutrally lit shot of each side of it and try to convert it into a height map.
Is a Shapeways print going to be high enough resolution to show off those details?
[Updated on: Sun, 05 February 2012 08:01 UTC]
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| Re: Coin in 3D from a texture [message #43479 is a reply to message #43433 ] Sun, 05 February 2012 11:24 UTC |
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Alternatively, you could (in the worst case manually) trace the detail to vectors, and build the 3D model from the outlines. I think it's certainly doable, it might just be some work, there seems to be a lot of detail!
To print in a regular coin size, silver might be the best option..!
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| Re: Coin in 3D from a texture [message #43708 is a reply to message #43479 ] Thu, 09 February 2012 00:03 UTC |
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123D catch won't work in this case as it fails miserably in the presence of specularity, and coins are notoriously shiny. If you painted the coin first in a matte paint it might work.
What might work better is to take the coin (if you have it physically) and do a rubbing of it with a very soft pencil or a dark wax crayon - this will give you a sort-of relief map of the surface which can then be scanned and used in Cheetah3D or similar modelling package to make geometry for manufacture by Shapeways.
But if you have the coin physically you can just make a silicone mould from it and cast it in a low melting point alloy.
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| Re: Coin in 3D from a texture [message #43717 is a reply to message #43715 ] Thu, 09 February 2012 01:00 UTC |
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Definitely not a hopless case.. just may take some extra work.
I would still at least think about giving a program such as 123dcatch a try. One easy way to get around the specular hilights would be to make a plaster cast of the coin and then scan the cast, rather than the coin.
There are 3d scanning services out there, but if you're into do-it-yourself, there's also stuff like this: http://revision3.com/systm/laserscan
Patience, Persistance, Politeness - the 3Ps will help us get us to Perfect Printed Products
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| Re: Coin in 3D from a texture [message #44189 is a reply to message #43723 ] Sun, 19 February 2012 19:48 UTC |
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I can do this for you in ZBrush 4 if you have high resolution images. The more images, and the higher the resolution, the better.
www.tommycharlesportfolio.com
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| Re: Coin in 3D from a texture [message #44237 is a reply to message #44201 ] Tue, 21 February 2012 01:34 UTC |
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Another possible option:
You could try making a paper rubbing of the coin.
Basically, this: http://en.wikipedia.org/wiki/Stone_rubbing
Scan the rubbing. Convert the scanned image into a monochromatic BMP. Then use the Shapeways Imagepopper to take the monochromatic tracing and turn it into a 3d model. You'd need to do this twice - one for each side - and there would likely need to be a bit of cleanup in the scanned 2D image stage, but it would be a fairly quick process to go from real to 3D this way.
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| Re: Coin in 3D from a texture [message #44695 is a reply to message #44237 ] Thu, 01 March 2012 04:02 UTC |
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This could probably be done by converting the scan to greyscale and using that as a displacement map for a high res mesh. You'd just have to be mindful of the minimum details for whatever material you'd want this printed in.
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