how do you mask pixels outside a region of interest

[JED1986]

I am using Labview to perform some eye tracking, I am particularly looking at some reflections in the pupil.  I use a circular edge VI to find the pupil.  I then use the pupil parameters to construct a region of interest.  After this I use a ROI to Image mask VI then a IMAQ Mask VI to attempt to isolate the pupil.  The problem is the mask replaces all the pixels inside the region of interest rather than outside it.  How do I go about getting it to mask the pixels outside the pupil rather than inside?

Any help would be greatly appreciated.

Joe

[Andrey_Dmitriev]

Hi, Joe,

Just try to inverse your Mask with IMAQ Inverse.

Andrey.

[muks]

The default value is to mask outside only. You can do like this

[muks]

solved?

[JED1986]

Hi,

Yes thank you I found another example describing how to find a circular region of interest which worked, unfortunatley I don't seem to have the VI you were refering to.  This was the solution I used in the end.

[muks]

The function which i pasted was created from vision assistant. You will have IVA lib files too. Anyway glad you have a solution...