Re: Re: calling all uber geeks

ImageJ can do everything nih-image could do and more. :)

Gord

On Tue, 20 Apr 2004, Sam Wang wrote:

> Hi Dwayne,
>
> I played with the generation of 3D from greyscale as well, way back then. The software I used was NIH
> Image, a freebie written by Wayne Rasband of the National Institute of Health. It was used by scientists
> all over the globe in processing images. Though not having been updated for a while, it is still very
> useful and can be freely downloaded from:
> http://rsb.info.nih.gov/nih-image/
>
> It can't replace Photoshop since it's primarily an 8 bit image processor, but I can guarantee that you
> loads of fun, plus perhaps an insight on why medical images look the way they do. Besides generating
> great looking 3D pictures of greyscale graphics, it also has a very cool histogram feature - it makes
> histogram of any straight line that you draw. So, a student of mine wrote a macro and saved slices of
> such histogram and made a 3D photo-sculpture out of them. Unfortunately he had to cut the pieces by
> hand, but that was gosh a long long time ago, when monitors showed just black and white pixels...
>
> Sam
>
> >
> > From: DWAYNE SANDALL <sandall@shaw.ca>
> > Date: 2004/04/20 Tue AM 11:20:48 EDT
> > To: alt-photo-process-l@sask.usask.ca
> > Subject: Re: calling all uber geeks
> >
> > Barry,
> >
> > Here's my thinking on this, along with a couple of questions. First, the questions, if I recall correctly,
> an stl file is a 3D file, and if that is correct, then what I am guessing you want to do is make a 'textured'
> surface print? The rest of my comments are based on this assumption, of making this textured print.
> >
> > I think the answer you are looking for in this case might be in the realm of terrain mapping. When I
> was in architecture school in the early/mid 90's I would take arial or sattelite images and be able to
> make a 3D terrain model into which I could insert my 3D model of the building.
> >
> > Here's a bit of the theory of how it worked. The arial photos would be in greyscale, adjusted so that
> pure white was the highest point of the ground, and pure black would be lowest, and the shades of
> grey would be somewhere in between. The software would interpolate the pixels and build a 'mesh' that
> would approximate the surface.
> >
> > Although the only time I made any physical 3D
> > prototype was of a building model, and it was pretty cool to see something come out of the screen
> into a piece of platic.
> >
> > Once, late at night in the school's computer lab, for kicks, I had taken a photo of my face and made a
> mesh out of it.. it was pretty weird looking, but then again, some say I am too :-)
> >
> > As for software, I am a bit out of touch in this realm, as I last did anything like this in the late 90's,
> but being the pack-rat that I am, I probably have some of the software backed up that I could refer to
> and point you in the right direction.
> >
> > I hope this helps,
> > Dwayne
>
>

---------------------------------------------------------
Gordon J. Holtslander Dept. of Biology
holtsg@duke.usask.ca 112 Science Place
http://duke.usask.ca/~holtsg University of Saskatchewan
Tel (306) 966-4433 Saskatoon, Saskatchewan
Fax (306) 966-4461 Canada S7N 5E2
---------------------------------------------------------
Received on Tue Apr 20 20:07:53 2004