We analyze the radiative properties of scattering medium in the boiler in the visible range and deduce the expression between the temperature of the radiation object and the luminance of pixel in the image produced by ccd camera ; 2 简要分析了工业炉内弥散介质在可见光范围内的辐射特性,推导了辐射特性与温度的关系,并在此基础上推导了高温辐射体温度与ccd图像灰度之间的简化关系式; 2