Re: Camera Software

Thanks. Speaking of materials, polymer clays might go through a
nozzle. It's made of clay, PVC resin and various plasticizers. Bake
out the plasticizers and it hardens. Not very strong, but there's no
reason not to use a different base than clay, like the various fibers
they use in printed circuit board laminates.

And if you had a good mixing nozzle, you could branch out into epoxies
and avoid the issues with hot melt.

On 8/2/06, Sebastien Bailard - Dubsen <Sebastien.Bailard@...> wrote:
> This discussion is interesting.
>
> I've read a little bit about the field. Using a camera to make measurements
> is called photogrammetry. e.g.
> http://en.wikipedia.org/wiki/Photogrammetry
> http://scholar.google.com/scholar?q=photogrammetry&ie=UTF-8&oe=UTF-8&hl=en
>
> I've even bolted a digital camera and a laser pointer onto a mill or other
> cnc
> system, such as a reprap, to scan an object in order to do "object
> reconstruction" The laser pointer is directed at a glass rod to create a
> fan
> shaped plane of light. The postioning system scans the object, software
> processes the scan data and creates a .stl file, and a mill or reprap
> recreates the object. It's called structured light scanning.
> http://en.wikipedia.org/wiki/3D_scanner#Structured_light
>
> You can buy scanners, scanning heads for cnc systems, and software. I'm
> interested in making and documenting a system.
>
> links:
> http://www.dubsen.org/twiki/bin/view/Main/RepRapLaserScanningHead
> http://splinescan.co.uk/
> http://scholar.google.com/scholar?hl=en&lr=&q=object+reconstruction&btnG=Search
>
> Along with the obvious applications to reprap, I'd like to build a 3D
> scanning
> head in order to scan oil clay models of jewelry or sculpture.
>
> -Sebastien
>
> On Tuesday 01 August 2006 16:54, ED MAISEY wrote:
> > Hi Dennis,
> >
> > In my days it was called a shadowgraph, I wouldnt mind betting you could
> > pick one of those up used at a very reasonable price, and they were fairly
> > accurate,
> >
> > ...........................Edmund......................
> >
> > Neil Gillies <neil@...> wrote:
> > Hi Dennis
> >
> > The semiconductor world is full of this stuff - on a small scale of
> > course but the technology is the same.
> >
> > Here's a link to probably one of the best systems ...
> >
> > http://www.muetec.com/products/wafer/muetec-100.php
> >
> > Don't get too anal about lens distortion, it's amazing what some
> > simple algorithms can correct for and
> > the accuracy that can be achieved is absolutely mindboggling.
> > Oh - and an encoder isn't needed either for short measurements :-))))
> >
> > Have fun
> >
> > Neil
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
> >
> >
> > ........Edmund.........
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
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> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
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