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akeba

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Posted on Wednesday, December 15, 2004 - 5:17 pm:   Edit PostDelete PostView Post/Check IPPrint Post

Hi!

What kind of techniques there exist for creating a "flat" 3d model from a pair of 2d-pictures without finding the pixel pairs from the pictures manually? It will propably need some kind of pattern recognition, but is there any site where to begin or does anybody have idea?
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GianCarlo

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Posted on Wednesday, December 15, 2004 - 11:38 pm:   Edit PostDelete PostView Post/Check IPPrint Post

I did this for my senior project in college. I just took the line-by-line pixel-matching approach. I got the best results by making tweens (horizontally anti-aliased) between the pixels and finding the best matches based on color patterns.

Then I filtered out the points in space that were not near any others which were almost always error.

I did all this with two low-cost wireless color X10 webcams. They really sucked. They had terrible color/brightness/image distortion. Yet my results were still pretty cool if not always perfect. If I had better or higher resolution cameras, I would have had much better results. Adding a third camera to get some vertical pattern matching would have helped a ton, too.

If I had tons of time, I would consider burning my code on a chip and try to get the 3D captures real-time or start looking into some pattern/shape recognition to add some more error correction to the mix.

Some universities with expensive cameras have gotten some really good results using just a pair of images. But a laser-contour scan or projected grid is often a far easier way to map the depth of close up objects - like they use to sculpt people's faces inside glass.
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Anonymous

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Posted on Thursday, December 16, 2004 - 10:56 am:   Edit PostDelete PostView Post/Check IPPrint Post

3dsnapper is software that you take a dozen
or so digital camera pictures from all around
an object mask the edges of the object by coloring in the object easily with
a single color paintbrush in the software then the software
creates a textured 3d object that can be
exported to 3ds object in the more expensive
versions. I think it's from
www.scanbull.com or www.scanbull.com.de
It's pretty easy to use but no demo
any more since Scanbull bought out 3dSnapper

Canon were developing similar software
but never finished nor released it as far
as I no.

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