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二维Otsu自适应阈值选取算法的快速实现
引用本文:汪海洋, 潘德炉, 夏德深. 二维Otsu自适应阈值选取算法的快速实现. 自动化学报, 2007, 33(9): 968-971. doi: 10.1360/aas-007-0968
作者姓名:汪海洋  潘德炉  夏德深
作者单位:1.国家海洋局第二海洋研究所卫星海洋环境动力学国家重点实验室 杭州 310012;;2.南京理工大学计算机系 南京 210094
摘    要:Otsu 自适应阈值算法作为图像阈值分割的经典算法, 在图像领域得到了广泛的应用, 在此基础上发展起来的二维阈值法因为计算时间长而制约了其应用. 针对二维 Otsu 自适应阈值算法计算复杂度高的缺点, 通过消除二维自适应阈值算法中的冗余计算, 用迭代的方式得到查询表, 从而大大提高了二维阈值算法的计算速度. 实验结果表明, 该算法不仅计算时间远远小于原始二维 Otsu 算法, 并且求得的阈值跟原始的算法一样.

关 键 词:阈值选取   类间方差   图像分割   Otsu
收稿时间:2006-03-29
修稿时间:2006-03-292006-06-15

A Fast Algorithm for Two-dimensional Otsu Adaptive Threshold Algorithm
WANG Hai-Yang, PAN De-Lu, XIA De-Shen. A Fast Algorithm for Two-dimensional Otsu Adaptive Threshold Algorithm. ACTA AUTOMATICA SINICA, 2007, 33(9): 968-971. doi: 10.1360/aas-007-0968
Authors:WANG Hai-Yang  PAN De-Lu  XIA De-Shen
Affiliation:1. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012;;;2. Department of Computer, Nanjing University of Science and Technology, Nanjing 210094
Abstract:As a classical image segmentation method, Otsu adaptive threshold algorithm has been applied widely in image processing. But the long-time computation limits the use of the two-dimensional Otsu threshold algorithm based on the Otsu threshold algorithm. This paper gives a fast algorithm for twodimensional Otsu adaptive threshold algorithm that overcomes the disadvantage of computational complexity. This fast algorithm gets rid of redundant computation and yields a look-up table by iteration. The experimental result has demonstrated that the computational time of the fast method is not only far less than that of the original two-dimensional one, but also yields the same threshold as that of the original method.
Keywords:Otsu
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