Hi,
1. YES. Please use VPI.
VisionWorks is our legacy vision library and we don’t have an update plan for it currently.
2. The VPI example combines with OpenCV library as an image reader.
Suppose you can follow the similar steps to combine VPI with VisionWorks/NPP.
3. You can check this sample for more information:
/opt/nvidia/vpi/vpi-0.1/samples/02-stereo_disparity
Thanks.