Try to use IMAQ UAB to follow the Plait point.


Hey guangli,.

I want to start by apologizing for my previous comment. While the reference to the image through the VI of wiring as mentioned in my last post would help keep track of things, it is not absolutely necessary for the model of the picture. It is because you are wiring already the reference to the back buffer image to all of the screws that create the model. Then, this location of buffer would become the model. It is useful to keep in mind in the course of other image manipulation routines (that you actually change the information contained in the buffer points to the image reference).

Thanks for pointing the example you started from. I took the liberty to change this example (see table) to make it more readable and more valuable to your routine. In this example, I use the VI IMAQdx (Vision 2009 Acquisition now supports USB cameras which are compatible DirectShow) to acquire the image. I then use the same routine that you see in the example to create a model and then look for this model in the following images. I also took the liberty to clean the block diagram and get rid of the sequence structures and used the error handling to force the order of execution. In your example, you were not far off, I think he started to receive a bit of confusion with the buffers of different image of many unnecessary sequence structures. So, I hope that this example works for you, or be a little easier to work with.

Each Subvi node and property that has error and error devices. By connecting these terminals of a Subvi to another, we can force the order of execution and keep track of all the errors that occur in code. Therefore, if and the error occurs, we can pin point much more fast where it comes and can then solve.

The example is in LabVIEW 8.6, let me know if you need a different version.

Tags: NI Hardware

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