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What you can do with this website ...

Thu, 06/04/2009 - 00:04 — Admin

You can contribute to and benefit from this website in many ways. Here are some examples:

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Comments

Fri, 04/08/2011 - 05:48 — sophia

displacement calculation in milimeters

hi,

i was wondering how we could use the software in order to calculate
the displacement of a specific point. the displacement is small(in term
of xe-2 mm).

we applied small spots on a test material, we took 2 pictures, before
and after the traction experiment. the problem is that the displacement
is so small that it is not  obvious to choose the same point even with
the zoom option.

can the software be that accurate to give exact results?

Tue, 04/12/2011 - 22:48 — Admin

Re: displacement calculation in milimeters

With our newest program, we can detect displacement as small as 0.00001 pixels if the image quality is very good.  Let's assume that the accuracy is 1% of that, i.e., 0.01 pixels, in order to detect 0.01mm, the actual dimension of each pixel must be no more than 1mm.  This is very easy to achieve in practice.  If your camera gives you 1024x1024 pixels, then it is fine once the object in the image is less than 1000mm wide.