五帧差分法提取实测红外烟幕图像的特征参数  

Five⁃frame Difference Method for Extracting Characteristic Parameters from Measured Infrared Smoke Screen Images

作　　者：郭爱强 高欣宝 李天鹏 戴俊杰 李笑楠 GUO Ai-qiang;GAO Xin-bao;LI Tian-peng;DAI Jun-jie;LI Xiao-nan(Shijiazhuang Campus,Army Engineering University of PLA,Shijiazhuang 050003,China)

机构地区：[1]陆军工程大学石家庄校区,河北石家庄050003

出　　处：《含能材料》2021年第12期1144-1151,共8页Chinese Journal of Energetic Materials

摘　　要：为提取实测红外烟幕的效应特征量(烟幕宽度、烟幕高度、烟幕遮蔽面积、遮蔽时间)和运动特征量(垂直方向、水平方向的扩散速度)参数,设计了野外测量红外烟幕的试验场地布置方案,应用红外热像仪采集了红外烟幕弹在112 s内爆炸和扩散过程的视频数据,采用了五帧差分法对红外热像仪视频序列中的红外烟幕进行分割和提取,得到了红外烟幕的效应特征量区域和运动特征量区域,并根据场地布置的几何关系对试验结果进行了风向修正,以红外烟幕图像像素点为基本单元,对红外热像仪视频序列中每一帧烟幕的效应特征量区域和运动特征量区域中每一个像素点所代表的实际烟幕高度数值和宽度数值进行了求解,进而得到红外烟幕的效应特征量和运动特征量参数。经实测红外烟幕视频分析验证,该方法可以快速提取红外烟幕特征参数,其爆炸瞬间烟幕宽度、烟幕高度、烟幕遮蔽面积迅速增加至4.7 m,5.2 m,24.2 m2,水平沿风速方向的烟幕前沿扩散速度达到了126 m·s^(-1),垂直方向烟幕前沿扩散的速度达到了146.3 m·s^(-1)。对研究红外烟幕扩散仿真方程的修正、作战效能评估、作战运用具有较高的实际应用价值。In order to extract the effect characteristic parameters(smoke screen width,smoke screen height,smoke screen cover⁃age area,masking time)and motion characteristic parameters(vertical and horizontal diffusion speed)from measured infrared smoke screens and,the layout of the test site for field measurement of infrared smoke screens was designed.The infrared thermal imager was used to collect the video data of the explosion and diffusion process of the infrared smoke bomb in 112 secs,and the five⁃frame difference method was used to segment and extract the infrared smoke screen from the video sequence of the infrared thermal imager,then the effect characteristic parameter area and motion characteristic parameter area of the infrared smoke screen were obtained.According to the geometric relationship of the site layout,the test results have been corrected for wind di⁃rection.The pixel points of the infrared smoke screen image were used as the basic unit that the actual smoke screen height and width values represented by each pixel in each frame of the video sequence were solved,and then the effect characteristic pa⁃rameters and motion characteristic parameters of the infrared smoke screen were obtained.It was verified by the analysis of actu⁃ally measured infrared smoke screen videos that this method can quickly extract the characteristic parameters of infrared smoke screen.At the moment of explosion,the width,height,and area of the smoke screen rapidly increase to 4.7 m,5.2 m,and 24.2 m2,respectively,and the front diffusion speeds along the wind direction reached 126 m∙s^(-1)horizontally and 146.3 m∙s^(-1)vertically.,It has highly practical application value for the research on infrared smoke screens,including the correction of diffu⁃sion simulation equation,the combat effectiveness evaluation,and on the combat operation.

关 键 词：实测图像 红外烟幕 五帧差法 效应特征量 运动特征量 

分 类 号：O383[理学—流体力学] TJ5[理学—力学]