how can i draw a freehand line and measuring it leangth

[Overhead]

i want to measure the leangth of something like curve, eyverytime it looks different, so i has to draw a freehandline, with which tool ??
I´m Using Labview6.1 and Imaq

Thanks

[chutla]

There is a "length of curve" function in the math toolbox. Your main challenge will be to convert your IMAQ image into a matrix. Alternatively, there are a few "mouse-odometer" tools out there that will record the actual distance your mouse has moved. You will have to, of course. trim the data to movements within your actual picture window.

[Julie S]

The easiest way to do this is using the Vision add-on software. There is a "FreeHand Line" tool that allows you to draw a line on your image and then measure that line length. Here is more information on the Vision software:
http://sine.ni.com/apps/we/nioc.vp?cid=2881〈=US