Dear All
This software, which was born in the civil engineering world for RE'ing
buildings from multiple digital snaps, has moved on leaps and bounds. If you
ask TCT (magazine) for the proceedings of the latest TCT conference (Cardiff
, Wales) you will find a nice case study where Westland Helicopters are
using this to good effect on large assemblies.
The systems I have seen and used to-date rely upon feature recognition in
greyscale images and the manual 'placing' of basics (planes, cylinders,
boxes, spheres, etc) to 'represent' 3D forms. Also by having the value of
known entities (such as spheres) in an image does not mean that all other
entities in the image are exactly represented (a bit like trying to measure
a cantilever where 0.1mm movement at one end equates to 10mm at the other).
For this reason I am yet to be convinced of the quoted accuracies (sub 1mm)
due to the subjective nature of this process, but this technology has it's
uses for ships, large legacy aircraft, buildings, landscape,
oil-rigs...etc...etc. Who knows, it may continue to develop rapidly
alongside digital camera resolution.
This technology has no place yet in our markets (Delcam's CopyCAD), where
products from toys to mobile phones to shoes to car components to aircraft
components require high quality processes which are quantifiable (XYZ
coordinate data) and accurate (surface fit to sub 0.1mm).
Chris Lawrie Product Marketing Manager
Delcam Plc Email cl@delcam.com
Talbot Way tel +44 121 766 5544
Small Heath fax +44 121 766 5511
Birmingham mob +44 411 353330
B10 OHJ, UK www.delcam.com
-----Original Message-----
From: Anshuman Razdan [mailto:razdan@asu.edu]
Sent: 24 October 2000 05:22
To: 'David Maxfield'
Cc: 'Rafael Santillan'; 'LISTA RAPID'
Subject: RE: Scanning software
Well - what company was it? So you have to have specialized hardware/film
and picture taking skills for this. I was referring to softwares that claim
to use generic pictures to compute the stereo.
Thanks
AR
>> -----Original Message-----
>> From: David Maxfield [mailto:thor@peak.org]
>> Sent: Monday, October 23, 2000 9:05 PM
>> To: Anshuman Razda
>> Cc: 'Rafael Santillan'; 'LISTA RAPID'
>> Subject: RE: Scanning software
>>
>>
>>
>> I worked for one company that was able to automate
>> stereophotogrammetry.
>> They placed sapphire beads (autoreflectors) at critical
>> locations on the
>> part. One set of photos were taken with a high contrast film, so the
>> computer could scan them and identify the key locations.
>> They were able
>> to obtain accuracies for the key points on the order of
>> 0.001 in. radius.
>>
>> David Maxfield
>> Incre, LLC
>>
>> On Fri, 20 Oct 2000, Anshuman Razda wrote:
>>
>> > The process is called stereophotogrammetry and none of the
>> software I have
>> > tested work. You have to manually pick points in different
>> views and the
>> > accuracy suffers. Unless there is new software that is
>> automated and
>> > accurate that has come to the market that I dont know about.
>> >
>> > AR
>> >
>> > Dr Anshuman Razdan,
>> > Director PRISM
>> > MC 5906, GWC 574
>> > Arizona State University
>> > Tempe AZ 85287
>> > http://prism.asu.edu/~razdan
>> > 480 965 0483 (Tina)
>> >
>> >
>> >
>> > >> -----Original Message-----
>> > >> From: owner-rp-ml@ltk.hut.fi
>> > >> [mailto:owner-rp-ml@ltk.hut.fi]On Behalf Of
>> > >> Rafael Santillan
>> > >> Sent: Thursday, October 19, 2000 3:02 PM
>> > >> To: LISTA RAPID
>> > >> Subject: Scanning software
>> > >>
>> > >>
>> > >> Hello
>> > >>
>> > >> does some body know where to get a software to digitize
>> > >> standard photgraphs and obtain 3d images.
>> > >>
>> > >> If so which software would be suitable to create the
>> > >> STL files from one of this solid models
>> > >>
>> > >> By the way
>> > >> I heard about using a standard flatbed scanner to scann
>> > >> a solid and create a solid object.
>> > >> who good is this system ?
>> > >>
>> > >> thanks for your help
>> > >>
>> > >> **************************************************
>> > >> * Dr. Rafael Santillan, Phone: 52-42-226774 *
>> > >> * Director 3D RAPID Fax: 52-42-226774 *
>> > >> * Mobile: 52-42-366015 *
>> > >> * Email: rsanti@3drapid.com *
>> > >> * Address: Priv. Martin Carrera 105, *
>> > >> * Colonia Presidentes *
>> > >> * City: Queretaro,Qro. MEXICO. Zip. 76080 *
>> > >> * WEB: http://www.3drapid.com *
>> > >> **************************************************
>> > >>
>> > >> -------------------------------------------------------------
>> > >> ----------
>> > >>
>> > >> For more information about the rp-ml, see
>> http://ltk.hut.fi/rp-ml/
>> >
>> >
>> > For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
>> >
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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