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从目标和背景亮度对比度的角度出发,构建了红外照射条件下目标和背景的亮度融合模型,得出了亮度融合的条件。针对红外探测中不同组合的目标和背景,探究了红外照射条件下亮度融合的适用对象,并进行了仿真验证。结果发现:通过红外照射的方式实现目标与背景亮度融合的方法,适用于与背景相比具有高发射率的亮目标和低发射率的暗目标,特别地,对于温度与背景相等的目标,实现某波段上与背景亮度融合的辐射照度等于温度为T(T=Tt=Tb)的黑体在该波段上的辐射出射度。最后,通过红外照射系统照射不同组合的目标和背景(亮目标和暗目标),一定程度上实现了中红外波段目标和背景的亮度融合,验证了理论的有效性。
From the perspective of target and background brightness contrast, the brightness fusion model of target and background under infrared irradiation is constructed, and the conditions of brightness fusion are obtained. Aiming at different combinations of targets and backgrounds in infrared detection, the applicable objects of brightness fusion under infrared radiation are explored and verified by simulation. As a result, it has been found that the method of achieving the fusion of the target and the background by means of infrared irradiation is suitable for a bright target with a low emissivity and a dark target with a low emissivity as compared with the background, and in particular, for a target with the same temperature and background, The irradiance at a band fused to the background brightness is equal to the radiant emission at this band of a black body of temperature T (T = Tt = Tb). Finally, the target and background (bright target and dark target) of different combinations are illuminated by the infrared illumination system, to some extent, the brightness fusion of the target and the background in the mid-infrared band is achieved, which proves the validity of the theory.