"inverted" ROI mask in IMAQ

[KChart]

Using IMAQ I need to be able to select regions in the image to IGNORE while captuing images.  For example, if I select an annular ROI in the image I want everything contained within the annulus to be blacked out while everything outside is collected as normal.  What's the best way to go about this?

[Cole_R]

Hi KChart,

To my knowledge, I don't believe we can create regions in the image to simply ignore.  Rather what you can do is select multiple regions of interest for the images.  Check out this thread: http://forums.ni.com/t5/Machine-Vision/Multiple-Regions-of-Interest/td-p/292078

I hope this helps!

[falkpl]

You can take the ROI and convert it to a mask with ROItoMask.  The mask is an image that is filled with values (1 inside roa and 0 outside).  Take the abs difference from 1 to invert this to get everything outside of the mask and multiply by the original image, now you will keep the values outside of the roi and zero all values (black out?) values inside of the selected ROI.