Edge detection?

[Visswanathan]

Hello,

I am trying to perform edge detection to measure the distance between two edges as shown in the attached GOOD IMAGE file.

When I run the VI (Screen shot attached) it some times detects the distance between a black particle and a edge shown in the BAD IMAGE file.

Can somebody help me solve this issue?

Please let me know what kind of filtering or threshold I need to use to make the bad image look like the good image.

Thanks and regards,

Visswanathan

[BruceAmmons]

A few suggestions:  Use a wide edge detection setting that is less likely to pick up small points.  Use "best edge" to find the highest contrast.  If they still have it, use a long filter in the direction of edge detection to only find thick edges, once again ignoring small particles.

Bruce