Re: Turnkey face carvings
Posted by
Andrew Werby
on 2000-12-12 12:34:54 UTC
Message: 4
Date: Tue, 12 Dec 2000 01:19:59 -0600
From: Jon Elson <jmelson@...>
Subject: Re: turnkey face carvings
ballendo@... wrote:
http://www.puffindesigns.com/support/downloads.html Don't use it for big
images, but for b/w under 300x300 it works pretty well in creating low
reliefs.]
Do keychains (to keep it small and quick
[Me too! But getting good digitizations of faces is tough. One of the best
systems I've come across is from 3d Metrics <http://www.3dmetrics.com> Its
advantage is speed- the capture is done inside a second, so expressions
aren't a problem. Dark hair will fool it, though, so either stick to old
people, forget about hair, or use white hairspray. Unfortunately, the
systems cost $20k and up. Check the iVersion site that's linked to them
<http://www.iversionsculpture.com>- these guys are producing portrait
sculpture using this system. I agree with you on the photogrammetric
approach- it just doesn't seem to work on organic forms, especially if they
have detail that doesn't show up in a silhouette. ]
But it needs to be good enough...
if a rotary axis is added. Laser engraving is not at all what I'm looking
for.
Jon
[I've done it myself by taking an alginate mold of a face and digitizing
the resulting plaster cast with a microscribe, but this isn't for
everybody- and the expression is usually somewhat "squinched". Have you
tried the Mosely "breadscanning" approach?
<http://pobox.upenn.edu/~jmosely/breadscantutorial/breadscanning.html> It
seemed to work, and you end up with something you can eat... ]
Andrew Werby - United Artworks
Sculpture, Jewelry, and Other Art Stuff
http://unitedartworks.com
Date: Tue, 12 Dec 2000 01:19:59 -0600
From: Jon Elson <jmelson@...>
Subject: Re: turnkey face carvings
ballendo@... wrote:
> If the goal is to create a "business opportunity", you may need to[There's one I've used called Knoll Cybermesh, it's available for free at
> leave your engineer hat at home... It won't be 'busts' in the round,
> but it could be 'bucks' all around :-)
>
> Put your 'marketer' hat on, and you'll see that a simple approach
> will work with existing low cost software and machines.
>
> First, go Bas relief or "engraved flat" picture. Use one of the many
> emerging bitmap to gcode (raster toolpath, depth based on pixel
> density) software pkg's.
http://www.puffindesigns.com/support/downloads.html Don't use it for big
images, but for b/w under 300x300 it works pretty well in creating low
reliefs.]
Do keychains (to keep it small and quick
> turnover) and mugs. Pics of grandchildren, for example. LargerYes, I know about that, I want to do REAL 3-D carving.
> pictures ARE available, but the wait will be longer.
[Me too! But getting good digitizations of faces is tough. One of the best
systems I've come across is from 3d Metrics <http://www.3dmetrics.com> Its
advantage is speed- the capture is done inside a second, so expressions
aren't a problem. Dark hair will fool it, though, so either stick to old
people, forget about hair, or use white hairspray. Unfortunately, the
systems cost $20k and up. Check the iVersion site that's linked to them
<http://www.iversionsculpture.com>- these guys are producing portrait
sculpture using this system. I agree with you on the photogrammetric
approach- it just doesn't seem to work on organic forms, especially if they
have detail that doesn't show up in a silhouette. ]
>[But would you want to cook one at home?]
> The quality of the image is NOT paramount! Is a McDonalds' hamburger
> the best you've ever tasted? :-)
But it needs to be good enough...
> Some 'playing around' with a single camera (settings, lighting,I already have a 3-axis milling machine which could do the work
> angles) should pretty quickly get you close.
>
> Then maybe use some intermediate software (paintshop or similar)
> to "pre-manipulate" the camera output to take advantage of what you
> have learned about the weaknesses of the bitmap conversion.
>
> Start with a spindle engraver for portability and low-cost. Look to
> use a laser engraver to increase thoughput later...
if a rotary axis is added. Laser engraving is not at all what I'm looking
for.
Jon
[I've done it myself by taking an alginate mold of a face and digitizing
the resulting plaster cast with a microscribe, but this isn't for
everybody- and the expression is usually somewhat "squinched". Have you
tried the Mosely "breadscanning" approach?
<http://pobox.upenn.edu/~jmosely/breadscantutorial/breadscanning.html> It
seemed to work, and you end up with something you can eat... ]
Andrew Werby - United Artworks
Sculpture, Jewelry, and Other Art Stuff
http://unitedartworks.com