Image cropping using NVision

[gbear605]

We have a 180 degree camera that we want to get an image from. We have it working using a basic camera server (the code that is demonstrated in SimpleVision sample project). To have a 180 degree field of view, the camera has the following view (the white space is the actual part that the camera sees)



When we are at a reasonable image size to stream on the network (320x340), the camera itself makes it so the pink square is all that we can see of the output. Our problem is that we need to see stuff that is in the white area of the circle below the pink square. What we are thinking we could do to solve this is to get the 1920x1080 image on the RoboRio and then use NIVision to crop it to an area below the pink square so we can see what we want to.

However, NIVision appears to have almost no documentation. What is the correct way to crop an image using NIVision?

[Greg McKaskle]

The NIVision documents are installed here ... C:\Users\Public\Documents\National Instruments\Vision\Documentation

The CVI documents are what you are looking for. You may also be interested in the Concepts document, though it isn't in that directory and I don't seem to have a viewer for it. You can find a pdf of it by searching the NI site.

Greg McKaskle