How to analyze a ROI of big image

[7890000]

Hello,

I am using a camera to record video of experiment.  The setup will automatically operate based on the information from the videos. The software need to analyze only a small region of big images, and get some useful information for the auotmation operation. How should I extract the small ROI informatino for further analyzing (threshold etc.)?  Some functions?  I tried IMAQ overlay ROI function. The function may draw a ROI on the image, but the software still analyze the whole big picture instead of the ROI.

Any suggestion or example would be very helpful for me. Thank you.

Beetle

[Prickly_Pear]

I think that this example demonstrates what you want to do:

https://forums.ni.com/t5/Example-Code/Extract-a-Part-of-an-Image-Using-Vision-Development-Module-for...

Good luck on your project.

Jeremy P.

[df86]

You can use the IMAQ Line Profile, or use the Extract Tetragon VI and run the extraction through the IMAQ Histogram VI