Using reduced motion vector set for real time motion registration in HDR imaging

In this paper, we propose a new global motion registration algorithm based on hierarchical motion estimation of a reduced motion vector set, specifically adapted for the properties of the HDR input images, and designed for implementation on handheld devices, demanding low computational complexity and memory load. The procedure is fully automatic and does not require any end-user involvement. The algorithm shows great effectiveness, correctly registering over 95% of the HDR input images captured by free hand.