Measurement of screening rate and its distribution of infrared smoke screen
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摘要: 目标与背景的辐射对比度是红外系统探测目标的主要依据，也是烟幕干扰重点降低的一个参量。结合辐射对比度的定义和红外定标原理，由目标和背景的视在辐射亮度引入其视在辐射对比度，并与目标和背景热像图的灰度值关联起来。利用烟幕遮蔽前后与目标和背景视在辐射对比度变化相对应的热像灰度对比度的变化，对烟幕遮蔽率进行表征。用提出的背景灰度方法对干扰实验结果进行了表征，计算得到3组试验的背景灰度值分别为91.902 4、88.002 0、33.285 6，并获得了目标区域各像元遮蔽率的直观分布图，克服了以往以点代面的评价方法。Abstract: The contrast of targets and backgrounds is a key feature detected by IR imager and a physical index reduced focally by smoke jamming. Combining the theory of radiance calibration with the radiation contrast, the apparent radiant brightness of the target and background was used to express the apparent radiation contrast, and as well connected with the gray values of the scene on IR images. Based on the change of contrast before and after screening with infrared smoke screen, the obscuring rate of infrared smoke screen was represented. It was proposed to determine the gray value of the background. The result of a certain jamming experiment was described with screening rate given by this method. Caculation results show that the gray values of background of three experiments are 91.902 4, 88.002 0, 33.285 6, respectively,and the visual distribution diagram of screening rate in the target region is given, which is superior to the traditional evaluation methods, and has a higher value in assessing the ability of infrared smoke.
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Keywords:
- radiance calibration /
- radiation contrast /
- infrared smoke /
- obscuring rate
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[1]Li Xiaoxia, Ma Sen，Zhao Nan，et al. Quantitative measurement of screening rate by a thermal imager [J].SPIE, 2011，8193: 481-485.
[2]Li Ning，Yang Ciyin，Cao Lihua，et al. Radiance calibration for 3 μm～5 μm infrared focal plane array[J]. Optics and Precision Engineering，2011，19(10)：2319-2325.
李宁，杨词银，曹立华，等. 3 μm～5 μm红外焦平面阵列的辐射定标[J]. 光学 精密工程，2011，19(10)：2319-2325.
[3]Hu Tieli, Li Xudong, Fu Jianming,et al. Double-blackbody unit for measuring parameters of infrared cameras[J]. Journal of Applied Optics, 2006, 27(3): 246-249.
胡铁力，李旭东，傅建明，等. 红外热像仪参数的双黑体测量装置[J]. 应用光学, 2006, 27(3): 246-249.
[4]Lou Heli，Lyu Xiangyin，Zhou Yuanpu，et al. Infrared radiation contrast between ground target and background[J]. Infrared and Laser Engineering，2012，41(8)：2002-2007.
娄和利，吕相银，周园璞，等. 地面目标与背景的红外辐射对比度特性[J]. 红外与激光工程，2012，41(8)：2002-2007.
[5]Li Yunjiang，Sun Xiaogang，Yuan Guibin. Accurate measuring temperature with infrared thermal imager[J]. Optics and Precision Engineering，2007，15(9)：1336-1340.
李云江，孙晓刚，原桂彬. 红外热像仪精确测温技术[J].光学 精密工程，2007，15(9)：1336-1340.
[6]Zhang Min. The modeling simulation of smoke screen and its effect analysis[D]. Changchun：Changchun University of Science and Technology，2011.
张敏. 烟幕建模仿真及其对探测器的影响分析[D]. 长春：长春理工大学，2011.
[7]Lou Heli，Lyu Xiangyin. Influential factors of infrared contrast features of object and baekground[J]. Infrare，2011，32(11)：1-4.
娄和利，吕相银. 目标与背景红外辐射对比度特征的影响因素及应用概述[J].红外，2011，32(11)：1-4.
[8]Du Shiming, Zeng Kai, Lyu Xiangyin, et al. Target and its background contrast under infrared illumination[J]. Journal of Applied Optics, 2010, 31(5): 838-842.
杜石明, 曾凯, 吕相银, 等. 红外光照射对目标与背景对比度影响研究[J]. 应用光学, 2010, 31(5): 838-842.
[9]Xie Minyong，Shen Weidong，Song Sihong，et al. Effectiveness evaluation of infrared stealth based on the contrast of target and background infrared radiation[J]. Infrared Technology，2011,33(2)：113-115.
谢民勇，沈卫东，宋斯洪，等. 基于目标与背景红外辐射对比度的红外隐身效能研究[J]. 红外技术，2011,33(2)：113-115.
[10]Zhu Chenguang，Pan Gongpei，Guan Hua，et al. Research of measuring method about sheltering coefficient of anti-infrared smoke-screen[J]. Infrared Technology,2004，26(4)：81-84.
朱晨光，潘功配，关华，等. 红外烟幕遮蔽率测试方法研究[J]. 红外技术，2004，26(4)：81-84.
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