Matter of finding edges on the square function

Hello

I have my first baby steps with NI Vision and the NI Vision Assistant, so please forgive me, if it is a fundamental issue.

I have created a process where I load an image with a square function. I'm trying to detect all four edges and determine the slope. (I intend to use this information in an autofocus vi as feedback on working using an xyz stage.) When I convert the script Assistant Vision in a LabVIEW vi, vi returns only the parameters of edge to the edges of three and four, while the edges 1 and 2 produce an empty array. What is the reason for this behavior and how can I get the vi to return all four edges? Thanks for your help.

Peter

Hi pbuerki,

In your Vision Assistant program, I noticed that your first 2 edge detect steps does not actually appear edges. Maybe it's because you specify where in the image that you want to find edges. You can do this by editing your edge detect stage, by clicking on the image and creating a line on which seek a change in the value of the pixels of neighbors.

In addition, here is a tutorial for Vision Assistant which can be useful for you in the future.

Tags: NI Software

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