I found App Note AN4629 very interesting. I'm trying to port surveillance and face recognition from the TI DM368 "F" to the iMX6. I'm fairly familiar with both platforms, but this App Note was excellent in that it showed how to use the VPU for object detection / recognition and provided references for further information. I didn't see the authors name in the App Note, but I wanted to offer my thanks for a well written and research App Note.
I was wondering if the source code for the App Note was available? I'd love to see a complete application based on this VPU approach, and tweak it to observe frame rates for face recognition at various resolutions.