三维直方图重建和降维的Otsu阈值分割算法

针对三维Otsu阈值分割算法中因区域误分而产生的抗噪性差这一问题,提出了一种三维直方图重建和降维的Otsu阈值分割算法.该方法首先在详细分析三维直方图中噪声点分布的基础上,通过重建三维直方图,减弱了噪声干扰;然后将三维直方图区域划分由八分法改为二分法,使得阈值搜索的空间维度从三维降低到一维,减少了处理时间和存储空间.本...

Otsu Thresholding Algorithm Based on Rebuilding and Dimension Reduction of the 3-Dimensional Histogram

In this work,a novel Otsu thresholding algorithm based on rebuilding and dimension reduction of the three-dimensional(3-D) was proposed with the consideration of the poor anti-noise performance in 3-D Otsu's method due to the obviously wrong region division.Firstly,our method rebuilt the 3-D histogram based on the distribution of noise points,which reduced the noise interference.And then,we transfer the region division in 3-D histogram from eight partitions into two partitions,thus reducing the search space of threshold from 3-dimension to 1-dimension,which saved a lot of processing time and memory space.Finally,segmentation result and running time were given at the end of this paper.In addition,comparations with those of 3-D Otsu's method,2-D decomposing approach and 2-D oblique algorithm were given as well.The results show that the presented method has better anti-noise performance and visual quality compared with the above three approaches,and lower time complexity compared with 3-D Otsu's method.