Comparisons reducing for local stereo matching using hierarchical structure

We propose a method for local stereo matching that reduces the number of matching comparisons, which also reduces the running time. By using hierarchical structure with suitable disparity candidate set, the proposed method maintains accuracy of local matching methods. Theoretical analysis and experimental results show that the number of comparisons of the proposed method is independent of the disparity range, while the accuracy is nearly the same as the corresponding local method.