find several ellipses

[wencheng]

hi

I'm trying to find more than 2 ellipses in the picture that had already finished threshold(as attachment),

i know the IMAQ Vision provides the Findcircles method, but it can't satisfy my application.

Does NI Vision has another method that can find more ellipses in a picture?

Do you have the algorithm about the method of FindCircles?

Thanks

[Lorne H.]

wencheng,

I am a bit confused with the attached picture.  Can you clarify?

Are the ellipses in the images signifying the objects you want to detect, or are the ellipses what you want to detect?

If you want to detect the ellipses the easiest way would be to do another threshhold so that you only have the elipses left in the image.  The result would be an image with 6 particles in it.  Each particle would be an elipse and you could can use "IMAQ Particle Analysis.vi" to get information about each ellipse.

I am not sure if I answered the question you wanted, so please clarify if needed.

Lorne Hengst
Application Engineer
National Instruments