home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.fractals
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!hurricane.gatech.edu!dharris
- From: dharris@hurricane.gatech.edu (Dave Harris)
- Subject: Re: Sofware for measuring fractal dimension ?
- References: <1992Dec14.122503.4675@jyu.fi> <1992Dec15.232243.1@nickel.laurentian.ca>
- Sender: nobody@ctr.columbia.edu
- Organization: Georgia Tech Research Institute, Signature Technology Lab
- Date: Fri, 18 Dec 1992 13:21:16 GMT
- Message-ID: <1992Dec18.132116.7033@sol.ctr.columbia.edu>
- X-Posted-From: hurricane.gatech.edu
- NNTP-Posting-Host: sol.ctr.columbia.edu
- Lines: 31
-
- >>In article <1992Dec14.122503.4675@jyu.fi>, tola@jyu.fi (Teemu Lahteenmaki) writes:
- >> Does anyone know is there any software availble for measuring fractal
- >> dimension ? The analyzis would be done from digitized images. As the
- >> images can have meny gray-scales it would be useful to have some kind of
- >> contrast-option..
- >> Any sources would be appreciated.
- >> ____________________________________________________________
- >> I Teemu Lahteenmaki - student of mathematical computing I
- >> I Intergalactical University of Jyvaskyla, Finland I
- >> I_ tola@jyu.fi ___________ 25 30'32" East 62 37'59" North _I
- >
- >I use Ultimage on a Mac to measure sierpinski fractal dimensions. The
- >software works great on up to 256 shades of grey and colour. I think
- >it is also available for the IBM.
- >
- >Michael Bardeggia
-
- I wrote a program to estimate fractal dimension and lacunarity using the
- method presented by Keller, Chen, and Crownover: "Texture Description and
- Segmentation through Fractal Geometry", Computer Vision, Graphics, and Image
- Processing, 45:150-66, 1989. It takes gray-scale images and returns the
- estimated fractal dimension, D, and various lacunarity numbers ( C(L) in the
- paper). It tends to over-estimate low dimensions and under-estimate high
- dimensions, but that's the limitation of the box dimension algorithm. It
- should be good for relative measurements though. If anyone's interested, send
- E-mail, but don't expect a reply until after the holiday. --Dave.H
-
- David E. Harris |"I wanted to play hopscotch with the
- Georgia Institute of Technology| Impenetrable Mystery of Existance, but he
- Atlanta Georgia, 30332 | stepped in a wormhole and had to go home early"
- Internet: dh46@prism.gatech.edu|--Crow T. Robot
-