METHOD AND APPARATUS FOR PARALLEL NMI-BASED 3D NONRIGID IMAGE REGISTRATION ON HYBRID CORES

摘要

PURPOSE: A method and an apparatus for parallel NMI-based 3D non-rigid image registration on hybrid cores simultaneously using CPU and GPU are provided to properly distribute computations necessary for non-rigid image registration to the CPU and the GPU and to minimize data transmission and reception between the CPU and the GPU, thereby rapidly performing the non-rigid matching of a three-dimensional image. CONSTITUTION: A graphic processing unit (GPU) (310) locally transforms a source image by B-spline free form deformation (FFD) based on a transformation function. A central processing unit (CPU) (330) produces the normalized mutual information (NMI) of the transformed source image and a target image by using a two-dimensional joining histogram calculated based on a brightness value of the source image and the target image. The CPU updates the transformation function by using a cost function based on the NMI of the source image and the target image. A matching image generator of the CPU reflects variables produced through the optimization process to the source image to generate an image matched to the target image.