NI Vision Functions

[ColonelThrtyTwo]

Originally Posted by AjFoster

We get the following errors:

taskExecutor: cannot find symbol
assertCleanStatus: cannot find symbol

You need to instantiate your own TaskExecutor and pass it to setTaskExecutor. assertCleanStatus is a protected method of the NIVision class, which checks if its argument is nonzero and if so throws an NIVisionException. Why it is protected, I don't know; you can't extend the classs because the only constructor is private. Just make your own, or copy+paste the source code from NIVision.java.

Is there any documentation for the imaq functions C-side? Specifically, I would like to use imaqDetectRectangles and need the fields of the RectangleMatch struct.

[jhersh]

Originally Posted by ColonelThrtyTwo

Is there any documentation for the imaq functions C-side? Specifically, I would like to use imaqDetectRectangles and need the fields of the RectangleMatch struct.

Look in C:\Program Files\National Instruments\Vision\Documentation\NIVisionCVI.chm

-Joe

[JewishDan18]

Originally Posted by ColonelThrtyTwo

You need to instantiate your own TaskExecutor and pass it to setTaskExecutor. assertCleanStatus is a protected method of the NIVision class, which checks if its argument is nonzero and if so throws an NIVisionException. Why it is protected, I don't know; you can't extend the classs because the only constructor is private. Just make your own, or copy+paste the source code from NIVision.java.

Is there any documentation for the imaq functions C-side? Specifically, I would like to use imaqDetectRectangles and need the fields of the RectangleMatch struct.

The way I did it was to make a new executer, and copy and past the assertCleanStatus function from the NIVision.java.

[AjFoster]

Thanks so much for the tips - everything runs error-free now.

Would it be possible to see an example of convexHull() being properly called (for an image which I've already used an HSL threshold on)?

[JewishDan18]

Originally Posted by AjFoster

Thanks so much for the tips - everything runs error-free now.

Would it be possible to see an example of convexHull() being properly called (for an image which I've already used an HSL threshold on)?

Sure, here is an example of how I call it:

convexHull(binaryImage.image,binaryImage.image,1);

That will find the convex hull of binaryImage and put it in binaryImage

[codes02]

Does anyone know if there is full documentation of the NIVision C functions anywhere to make this process easier?

[Greg McKaskle]

Program Filles/National Instruments/Vision/Documentation.

Specifically, you should look at the CVI document.

Greg Mckaskle

[jhersh]

Originally Posted by codes02

Does anyone know if there is full documentation of the NIVision C functions anywhere to make this process easier?

http://www.chiefdelphi.com/forums/sh...4&postcount=14