A method of input processing for augmented reality comprises the steps of capturing a video image, generating an augmented image layer for superposition over the captured video image, and for a region of the augmented image layer, detecting for each pixel in the region a property of a corresponding pixel in the captured video image, and mapping with a first mapping the property detected for each pixel of the region back to a reference two-dimensional array of pixels; and generating an input based upon the property values as mapped to the reference two-dimensional array of pixels.