I'm playing with the updated Imaging SDK v. 1.2 beta and I'm having some trouble trying to get the local blending target area to work.

I have everything in place: background image, foreground image and foreground mask but I'm unable to blend the foreground image into the target area I want to on the background image. What coordinates should I specify to the TargetArea property for the blend filter for an image of 3072x1728 px if I want the target area to be a 500x500 px area for x=800 and y=200?