Re: Ref: Free laser scanner software

Stan,

the webcam I am using is a cheap one, but is 1600 * 1200 pixels.
The problem at that resolution is that the framerate drops off. To get
a good scan you need to mechanise the movement of the laser. At lower
es, it works with the laser handheld.

At some point I will replace the lens with one from an old video
camera that I have, it will give less distortion as well as add zoom
and a bigger aperture. I have done this once before with a board cam,
and it works fine..

ps, I have a Harley Road King Classic

Cheers

Chris (-=Spiyda=-)

--- In CAD_CAM_EDM_DRO@yahoogroups.com, stan <stan.distortion@...> wrote:
>
> > It's hard to say what accuracy as I haven't actually measured it !
> >
> > that sounds a bit odd, but I only progressed far enough to know that I
> > could get a scan and that it was reasonably true, (not distorted) as
> > the rest is just scaling.
> That's good. A lot of cameras have a fish eye effect which can
really mess
> things up. Sounds like the apps you are using can already correct
for it,
> there are a few very good articles on the net for the same thing
(mostly with
> intel's image recognition libraries). I can dig up links to them if
anyone
> needs them.
>
> > Th main use to which I will be putting it is the scanning of existing
> > motorcycle parts in order for me to make parts that will fit on to
them.
> Even better :) What kind of bikes? I got hooked on old 2 stroke
kawasaki
> triples but have worked on a lot of modern stuff too, including the new
> bimotas. If anyone is passing a dealers nip in and have a look at
one, the
> silly expensive ones would almost be worth the price just to put in
the house
> as a work of engineering art.
>
> > So far I haven't used the technique in anger (eg actually use a scan
> > to make a part that has reached market) but I now know that I can..
> > if that makes sense.
> >
> > The biggest problems I had were getting a good laser line and coming
> > up with a non-reflective coating for chrome parts...
> Ouch.
>
> > I bought a licence this software so that I could use the fusion stuff,
> > and I also downloaded Meshlab for manipulating the scans and bought a
> > licence for Meshcam for generating toolpaths off them.
> >
> > It all hangs togetther, just need time
> >
> > Chris
> Another thing that could be trouble, webcams are mostly around
640x480 so all
> the vertical resolution you will get is 480 at best. There are a few
software
> tricks to improve the res with shades and the rotating will help a
lot if the
> software can get averages. The software should also be able to work
with
> still's so a cheap digital camera should give at least 3 times
higher res.
> Let us know how you get on with it, its impressive stuff :)
> cheers
>