I've ordered the 70D and while waiting I had a though about the Dual pixel AF sensor.
My question if half out of curiosity and half out of it feeling like it might be useful.
I'm thinking that using the techniques used for the 70D AF one could perhaps create a depth map of the actual subject and assign approximate distance values to different parts of the image using the lens information.
(Creation of this thing is what I'm talking about: http://blog.topazlabs.com/wp-content/uploads/2014/03/depth-map.png)
So my question then, is it possible to create a depth map using the EOS 70D Dual pixel AF? Also, would this even be possible using a DP-AF type sensor and lens information?
(I'm assuming the answer to be "No" because while potentially it is theoretically possible the 70D is never going to forward the DP-AF information)