结合博弈论的马尔可夫随机场红外图像分割
第36卷 第10期 红 外 技 术 V ol.36 No.10 2014年10月 Infrared Technology Oct. 2014
〈图像处理与仿真〉
结合博弈论的马尔可夫随机场红外图像分割
王 坤，张 恺，王 力，诸葛晶昌
（中国民航大学，天津 300300）
摘要：电路板红外图像芯片提取是电路板红外图像故障检测系统中的重要环节，已成为红外图像分割领域关注的一个重点。传统的芯片发热区域提取方法大多需要人工干预，且分割效果不理想，容易丢失边缘信息，导致细节特征不明显。针对以上缺陷提出一种结合博弈论的改进马尔可夫随机场分割算法。首先用现有的OTSU 算法对图像进行粗分割，将图像分为两个子集（背景域和目标域），然后利用马尔可夫随机场（MRF ，Markov Random Field ）理论建立图像分割模型，最后利用结合博弈理论的MMD （Modified Metropolis Dynamics ）算法，根据模型分别对每个子集进行细致分割，提取核心发热区域。实验表明，改进算法应用在电路板芯片发热区域提取时，能够较好地抑制噪声，准确处理边缘信息，与传统算法相比，在视觉效果和客观数据上都有很大的提高，具有一定的准确性和鲁棒性。
关键词：红外图像分割；马尔可夫随机场；博弈论；OTSU 法
中图分类号：TP751 文献标识码：A 文章编号：1001-8891(2014)10-0801-06
Infrared Image Segmentation Algorithm
Based on MRF Combined with the Game-theory
WANG Kun ，ZHANG Kai ，WANG Li ，ZHUGE Jing-chang
(Civil aviation university of China, Tianjin 300300, China )
Abstract ：Extracting the infrared image chip exothermic area at a circuit board ，which is an important part of the fault detection system, has also been a key point in field of image segmentation. Traditional extraction methods need manual intervention more or less, and the results aren’t ideal, also making the edge information and detail features be lost easily or not obvious. In view of above shortcomings, a segmentation algorithm based on improved Markov random field combined with the game theory is proposed. Firstly, use the OTSU algorithm for crude segmentation and divide the image into two subsets (background and target domains); Secondly, establish the image segmentation model through MRF; Thirdly, segment each subset meticulously and extract exothermic areas through MMD (Modified Metropolis Dynamics) algorithm combined with the game theory according to the model. The experiment results show that when extracting the infrared image chip exothermic area, the proposed algorithm can not only make the speckle noise suppressed, but also keep the detail characteristics effectively. Compared with the traditional ones, it makes a great improvement on the visual effect and objective data, and has a certain accuracy and robustness.
Key words ：infrared image segmentation ，MRF ，the game theory ，MMD ，OTSU method
0 引言 近年来，红外检测技术作为非接触检测方式，广泛应用到无损检测领域，以其准确性高、速度快、费用低、通用性强等特点，逐渐引起广大科研人员的重视，成为电路板故障检测的重要手段之一。电路板红
外图像芯片提取是电路板红外热成像故障检测的重要环节。