RE: 2D/3D scanning of small brass pieces

From: Anshuman Razdan (
Date: Fri Mar 01 2002 - 16:33:19 EET

If you just want an outline of the pins, scan them in whatever manner (any 3D
scanner) however the edges wont be sharp. Then take the points on the boundary
(which will have noise) and smooth them out with a least squers type
approximation BSpline curve. If you just want an outline and have hundreds of
these some one can write a small custom software to create smooth outlines. Send
me a pin or two and I can experiment in my lab.


Dr. Anshuman Razdan
Director, PRISM
Phone: (480) 965 0483 (Tina)
Office: GWC 574
Arizona State University
Tempe AZ 85287-5906

  -----Original Message-----
  From: []On Behalf Of
Kevin Lafferty
  Sent: Friday, March 01, 2002 6:31 AM
  To: rp-ml
  Subject: RE: 2D/3D scanning of small brass pieces

  For the amount of time and effort that would be required to scan, digitize,
paint, photograph, whatever, these items I would think it would be simpler to
just draw them in a 2D CAD program. The geometry can be captured exactly, the
data can be easily manipulated, and the drawings can be generated quickly (just
outlines, right?). Let me know if you’re interested in having this done and I
can provide you with some sources.

  Kevin Lafferty

> -----Original Message-----

> From: Evan Brastow

> Sent: Monday, February 25, 2002 2:43 PM

> To: ''

> Subject: 2D/3D scanning of small brass pieces cheaply?


> Good afternoon people,


> We are a company that manufactures brass lapel pins and keytags.

> We have a

> large inventory (500+ of our own different shapes, plus thousands

> of others

> of our customers' shapes) of dies with which to punch out brass blanks to

> form the basis of the pins.


> One thorn that's always been in our side is that of trying to get accurate

> outlines of these brass shapes (usually between 1/2" and 2" in size). We

> would like to be able to get dead-accurate vector files (.eps

> (preferable),

> .dxf, etc) of the outlines of all of these shapes.


> Over the years, I've tried scanning the brass on a flatbed

> scanner and using

> Streamline or anything else to trace the outline, but I'd like to get

> something much more accurate, and the shininess of brass means that the

> scanner doesn't pick up the edges well. I'm thinking that maybe a

> 3D scanner

> could do this, and maybe produce the outline, even though the outline we

> need is just 2D?


> I'm attaching a picture of one of the pieces... representative of

> what we'd

> need scanned. The pieces range from ¼" to 2-1/2" in diameter.


> Any idea of where I could get something like this done for a very cheap

> amount of money? (a couple of dollars per file?)


> Thanks


> Evan


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