3D Scanning
Gary Wooding
jewellery - but will also use it for scanning text for OCR. Does anyone
have any views, experience, recommendations etc. on this please?
--
Gary Wooding
Martin McDowell
When i was looking for a scanner, i got a reply from a chap who
mentioned that he had a Black Widow scanner which did a very useful 3D scan.
The story was that he had broken a bathroom tap - rang up the
plumbing supplies co. and tried to get a replacement part - but
couldn't describe the part sufficiently well enough to enable an
identification to be made (no part no.)
So he put the bits together on his scanner - and faxed the scan.
Hey presto - the company were able to identify the needed parts right away.
I eventually got an SCSI Black Widow - but not for the above ability!
and have had no probs.
So it could well fit your bill
It has a 'double' hinged (plastic) lid which takes 3" thick books
mags, which allows the lid (when closed) to still lie flat
I've noticed recent BW ads mentioning 3D scanning abilities as a selling point
Black Widow (Devcom) are in Scotland
Their Wed Address is:- http://www.blackwidow.co.uk/
HTH
Martin
The message <7ocitn$1cf$2...@barcode.tesco.net>
from "Gary Wooding" <Bins...@tesco.net> contains these words:
Richard Wintjen
> I'm considering using a scanner to get pictures of small 3D objects - mostly
> jewellery - but will also use it for scanning text for OCR. Does anyone
> have any views, experience, recommendations etc. on this please?
>
> --
>
> Gary Wooding
CIS scanners have very limited depth of field, but most CCD scanners have
adequate depth of field for small objects. With careful placement, you can even
create stereo pairs of an object by scanning twice, with the object moved
horizontally between scans, and combining the images.
Phil McRevis
<199908061...@zetnet.co.uk> thusly:
>So he put the bits together on his scanner - and faxed the scan.
Since FAX only sends a picture he could have done this with any kind
of scanner or camera.
There is software out there you can buy that will produce 3D models
from a desktop video conferencing camera. I have seen it for sale at
SIGGRAPH, but I don't recall the company off-hand.
If you only have a few objects to scan, just like PhotoCD services,
there are 3d scanning services. See
<http://www.cyberware.com/serviceCenters.html> (cyberware makes 3D
object digitizers).
3D digitizers come in a variety of technologies with different
accuracies. Cyberware's scanners scan the image of the object
concurrently with the geometry of the object giving you a model where
the texture map and geometry are aligned.
Stylus-based scanners return a point cloud of scan points which you
position manually. For a complex object, thousands of individual
points may need to be manually digitized.
Image-based software scanners work by using techniques from computer
tomography (medical cat scans, etc) and photogrammetry to deduce the 3D
structure from the various views. Like the cyberware devices they
produce texture maps and geometry that are aligned.
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