can i use IMAQ rake to find the edges in a binary image...?

[sincere]

I am having a thresholded image.I need to find the edges in that image.Is it possible to use IMAQ rake to find the edges in that image..?

[Christian Mergl]

Yes, it's possible!

[lordsathish]

Can some one post an example. I'm not able to set edge options properly for a binary image. I need to find both the first and last edge.

Thanks 

[Christian Mergl]

As far as I know the Rake algorithm has a default Edge Strength parameter of 10. In an binary image you have just pixels with the value 0 and 1. So the can't be a difference of 10! Out of this there would be two possible ways.

1. You can change this Edge Strengh parameter to 1.

2. You can change the binary image to have values of 0 and 255, so you will have a black and white image. This can be done using the Equalize Image        function.

Christian

[lordsathish]

IMAQ Rake is working fine when the binary image is converted to gray scale. In case of binary images when I set edge strength to 1, it was detecting only the last edge. I was not able to get the first edge.

Thanks