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Re: measuring lines [message #45836]

Wed, 12 October 2005 03:02

Andrew Cool
Messages: 219
Registered: January 1996

Senior Member

robin.vandebroek@gmail.com wrote:
> Hi,
>
> My apologies if this is a trivial problem.
> I have a bitmap which is a picture of glass fibers distributed on a
> flat surface.
> The bitmap is already processed so the fibers can be easily
> distinguished.
> Is there a way or a method within IDL to measure the length of the
> individual fibers apart from programming a scanning algorithm myself ?
>
> Thank you very much in advance.

Depending on the thickness of the fibres, you may be able to use
David Fanning's Find_Boundary routine, which returns the perimeter
of an object, amongst other bits of info. If the fibre is really quite
"skinny", then the length could be simply perimeter/2.0 ?? How accurate
do
you need to be is the other question...

Andrew

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		Re: measuring lines By: Andrew Cool on Wed, 12 October 2005 03:02
		Re: measuring lines By: David Fanning on Tue, 11 October 2005 04:37

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