CGAL users discussion list

[Marc Pouget <>]

On May 10, 2011, at 5:37 PM, Roberto Lam wrote:

> hi Marc, I am sorry to bother you again.

you're welcome!

> I read the manual an also your report
> "Topology driven algorithms for ridge extraction on Ridges" and I read
> "Multiplying the sharpness by the square of the model size gives a
> threshold and an associated sharpness-filter which are scale
> independent".
> What do you mean by model size?

the radius of the smallest enclosing ball

> I have done some filtering (by using a
> threshold of strength | sharpness threshold as sugested in
> 54.5.3   Example: Filtering of Crest Ridges on a Mechanical Part,
> in my objects and was ok. I am doing some reasearch in 3D object
> recognition by using  differential properties of its surfaces.
> If I can use a normalized version sharpness would be nice :-)
> 

the computed one already takes into account the normalization

MArc

> Best regards
> rlam
> 
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