摘要
目的:建立视频信号中数字显示的温度值的识别方法,为电磁辐射热效应研究提供定量依据。方法:采用MATLAB视频图像分析工具实现交互式的视频信号中数字区域的定位与分割、形态学操作预处理以及七段码规则数字识别分析,获得温度数据并绘制实验期间动物体表温度变化曲线。结果:使用交互式数字区域定位分割、形态学操作预处理以及七段码规则可有效识别视频中的温度显示数字,多次抽样检测的正确识别率为100%。识别过程中出现被高帧率的视频记录到的发光二极管动态显示变化过程发光滞留所形成的奇异点,可通过采用邻域中值替换法予以解决。结论:利用MATLAB识别此类视频信号中的数字具有方法简单、可靠,实用性强的优点,为促进电磁辐射热效应的研究提供了参考方案。
Objective：To recognize the digital temperature monitor meter display value from a multiple-channel video in order to determine the thermal effect of electromagnetic irradiation. Methods： MATLAB, especially its video image toolbox, was used to achieve the interactive location and segmentation of the digit image in video signals, image preprocessing with morphology operation, digit recognition with seven segment display rules, the value determination and plotting. Results： The method was able to recognize the value in the video signals with nearly 100% correctness in multiple sampling tests. However, there were also some abnormal data caused by LED light retention in the dynamic display process and recorded by high frame rate video. The problem was solved by replacing the points outside the range （ neighborhood average ~ standard deviation） with neighborhood median. Conclusion：This method is simple, highly adaptable and reliable, facilitating the re- search on biological effects of high power millimeter wave and providing a set of reference solution for this kind of research.
出处
《军事医学科学院院刊》
CSCD
北大核心
2009年第4期358-360,384,共4页
Bulletin of the Academy of Military Medical Sciences
基金
国家高技术发展计划(863计划)资助项目
军事医学科学院科技创新基金资助项目
毫米波国家重点实验室开放课题(K200807)资助项目
