@Looki: Oooh! You are right, the color conversion is false. I will correct it and include it in version 0.6.
@cel: I already experiment face tracking, I can try to add for a further version. For the other, I need to check how to provide the extension inputs and outputs. Why not. The challenge is mostly to manage these ressouce-consuming processes. But my first concern after releasing a first stable version of this extension would be rather to support 3D camera like Kinect.