IMAQ Find Straight Edge error -1074396023

[zou]

The angle tolerance has a minimum?

Somehow it's not documented.

It's embarrassing to learn this kind of error from the user.

[marcelmorin]

Hey Zou, 

You're right that minimum isn't documented in our help files. 

When you are getting to the 1000th decimal value the difference in angle becomes so minimal and combined with the pixels available in your image the angle of rotation returned isn't accurate bellow the 1000th decimal value.

Why does your application need to get a lower angle tolerance? What image size are you working with?

[zou]

That parameter is a calculated value.  Depends on a few parameters.  When one of them doesn't set properly, the calculated value becomes 0.  That's when the error show up.

I know what the angle should be (it almost a vertical line).  It should never over 90 degree.  Any points cause the angle over 90 degree should be threw away.

Image size is not relevant.