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在热红外扫描图像的判读工作中,热红外发射率是一个极为重要的影响因素。在某些特定条件下,这一因素的影响是十分显著的。然而,迄今为止,这一因素在热红外图像的判读工作中还没有引起人们的足够重视。本文试图从热红外辐射定律出发,结合白天和夜间的热红外遥感图像资料,以及地面温度测量数据来说明这一因素的影响,并较详细地讨论了一些与热红外发射率有关的影响因素。但是,如何在成像或者在图像判读过程中消除这一影响因素,还有待于进一步的研究。
Thermal infrared emissivity is a very important factor in the interpretation of thermal infrared imagery. Under certain conditions, the impact of this factor is very significant. However, so far, this factor has not drawn enough attention in the interpretation of thermal infrared images. This article attempts to start from the thermal infrared radiation law, combined with daytime and nighttime thermal infrared remote sensing image data, as well as ground temperature measurement data to illustrate the impact of this factor, and discussed some of the factors related to thermal infrared emissivity in more detail. However, how to eliminate this influencing factor in imaging or in the process of image interpretation remains to be further studied.