基于分形特征的红外烟幕遮蔽热像效果评价

Evaluation of the Effect that Infrared Smoke Screen Has on Thermal Image Based on Fractal Feature

提出一种基于分形特征的红外烟幕对目标热像遮蔽效果的评价方法,该方法将烟幕运动视为分形布朗运动,以自然背景和人造目标图像在分形特征上的固有差异为依据,利用战术目标分形拟合误差大的特点,采用表面积法计算目标热像区域不同时刻分维数和分形拟合误差的变化,来评价烟幕对目标热像遮蔽的程度。实验结果表明该评价方法有助于对遮蔽程度作出准确判别与分析。

This paper presents an evaluation method for the effect that infrared smoke screen has on the thermal image based on fractal feature. The method regards infrared smoke screen motion as fractional Brownian motion （FBM）, according to the intrinsic difference in fractal feature between natural background and artificial target, utilizing tactical target fractal fitting error heavy characteristic, adopting surface area method calculates the difference of fractal dimension and fractal fitting error of the target area in the thermal images at different time, and evaluates the effect that infrared smoke screen has on the thermal image. Some experimental results show that the method is an aid to differentiating and analysing the degree of infrared smoke screen obscuration accurately.