Abstract:

As the traditional background compensation methods can not deal with the background’s rotating, an improved  method of background compensation based on circular projection is proposed. Firstly, the compatible reference block is selected based on the local image entropy so as to enhance the practicability of the algorithm. Secondly, the traditional circular projection is improved, and the physic vector is used to get the rotate parameter; in addition, the kernel function is adopted to express the distance of each pixel so as to result in a more nicety result. Finally, the algorithm’s steps are given and the real images are used to test its performance. The experimental results show that the algorithm is not only suitable for various scenes and movements but also robust to gray change and noise.