On 02/17/2011 04:46 PM, Sebastián Miguel Giusti wrote:
Hi,
I am working with jpg image into gmsh. At this instant I need detect
(within gmsh) inside the image different objects or regions to
automatically create the corresponding "phisycal lines and surfaces".
After meshing the image, I need, from the output mesh file, the nodes
and elements that belong to each line and surface, respectively.
Any can help me !!!
Thanks,
As this question didn't received a reply, here are my 0.02€.
I don't believe Gmsh does that. Neither Gmsh nor any other program, for
what is worth.
If you really want to import a mesh from a raster image, a possible
course of action is to convert your raster image to a vector format and
then, after cleaning up the generated vector image, develop a program to
convert your vector image to any format Gmsh supports.
There are at least two problems with this suggestion, which are:
a) you must develop a program to extract meaningful geometry information
from your vector images
b) you must be able to generate vector images in such a way that they
can be consistently used by your vector-to-geometry program
As I don't believe that any of those problems has a feasible solution, I
believe that the best answer for your question is that what you want to
do is practically impossible. Therefore, probably it would be better if
you found a different way to generate/import geometry information.
Hope this helps,
Rui Maciel
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