一种改进区域能量融合规则的光子计数图像增强算法  

Photon Counting Image Enhancement Algorithm Based on Improved Regional Energy Fusion Rules

作　　者：仲红玉 尹丽菊[1] 胡浩东 王炫 寇廷栋 潘金凤[1] 蔡富东 Zhong Hongyu;Yin Liju;Hu Haodong;Wang Xuan;Kou Tingdong;Pan Jinfeng;Cai Fudong(School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo, 255049, China;Shandong Senter Electronic Co., Ltd, Zibo, 255088, China)

机构地区：[1]山东理工大学电气与电子工程学院,淄博255049 [2]山东信通电子股份有限公司,淄博255088

出　　处：《数据采集与处理》2019年第1期111-121,共11页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金青年基金(61801272)资助项目;大学生创新创业计划(20181043304X06)资助项目;2018张店区校城融合资助项目

摘　　要：为了得到融合效果更好的光子计数图像,提出一种改进区域能量融合规则的图像融合算法。由多像素光子计数器(Multi-piexl photon counter,MPPC)单一探测器在不同照度条件下扫描得到光子计数图像,并对其进行小波变换,得到高频图像和低频图像;然后计算两幅源图像高频部分的对应区域能量、邻域均方差、匹配度以及阈值,其中阈值是由局部图像的像素值和均值计算得到。如果匹配度大于或等于阈值,采用加权区域能量法确定融合图像;如果匹配度小于阈值,选取局部区域能量较大的源图像像素点的增强值作为相应融合图像中的像素点值。采用不同融合规则进行图像增强,结果证明在本文改进的融合规则下得到的光子计数图像细节更清晰,目标更易识别,评价指标中的信息熵、平均梯度以及空间频率的数值分别提高了约20%,25%和30%。In order to get photon counting fusion images with better effect,this paper proposes a fusion algorithm based on improved regional energy fusion rules.The photon counting images are obtained by the multi-pixel photon counter(MPPC)single detector in different illumination conditions,and the highfrequency and the low-frequency parts are obtained after wavelet transform of photon counting image.In the high-frequency part of the two source images,the energy of the corresponding region,neighborhood mean square,matching degree and threshold deviation are calculated.And the threshold is determined by pixel values and mean values of regional image.If the matching degree is greater than or equal to the threshold value,the weighted regional energy fusion method is used to solve it.Otherwise,the enhanced pixel value of source image with larger energy in local region is selected as pixel value in the corresponding fusion image.Using improved regional energy fusion rules for image fusion,it is proved that details of photon counting fusion image are clearer and target is easier to recognize,and the values of information entropy,average gradient and spatial frequency are about 20%,25%,and 30%higher than those of regional energy fusion rules.

关 键 词：光子计数图像增强 融合规则 区域能量 小波变换 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]