Le_Forgeron <jgr### [at] freefr> wrote:

> That's it for normal gear.

Indeed.   I learned a LOT when I started looking into modeling involute spur
gears.


> Now, could you explain what you intended to do with povray and gear ?

Well, the basic idea was to see if, using a simple photograph or scan of an
existing gear, if the number of teeth could be determined automatically and
accurately.  Just like in the link.

There seems to be a fair amount of image processing algorithms employed, all of
which use a 2D Fourier transform and its inverse to do things like hole-filling,
edge-detection, etc.

It would also be an interesting extension of the idea, if, once the basic
parameters of the gear were established, a 3D model could be generated.

Then you could automatically generate a parameter file, an include, or a mesh
from existing gears.

But the main idea was to be able to count the teeth.
Especially when there are a LOT of teeth, and the gears look very similar.
http://images.esellerpro.com/2131/I/680/19/RU5-0175.jpg
http://images.esellerpro.com/2131/I/680/17/RU5-0174%20003.jpg


I thought perhaps I could start with some basic image clean-up, then try to
figure out the center point, and then the radii of the addendum and base circle
so that I could determine the pitch circle and maybe the dedendum.

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