In current version, the image going to place on the center of detection box. This gave me an idea to adjust image position with (X,Y) position. Such as "quadrant" with maximum for each quadrant is 1.
Therefore, I can place the image in (-0.5, -0.5) from the center which is a lower left of detected box.
I think this give a possible to place image like QOS picture. (Also, enable to adjust picture rotation is gonna be good too.