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采用数字化摄象装置从电站锅炉炉膛第三级燃烧空间摄取燃烧辐射圈象时，所得到的二维灰度分布图象实质上是燃烧介质的三维辐射能量通过光学成象的方式在图象传感器（如CCD靶面）二维平面上的某种累积效应，以此原理为基础，本文建立了二维辐射国象和三维辐射能量（温度）分布的数学关系式，并从比色测温法入手，从理论上解决了其中难度较大的从幅射能转换到图象灰度的定量关系问题，使得这种方法变得简单易行。最后对这种方法实施的可行性进行了分析，并讨论了改进测量精度的途径。这种方法容易推广到内燃机燃烧、航空发动机燃烧等场合的三维温度分布检测中。
When a digital camera device is used to take combustion radiation patterns from the combustion space of the third stage of the boiler of a power plant, the obtained two-dimensional gray distribution image is essentially the three-dimensional radiation energy of the combustion medium through optical imaging. (Such as the CCD target surface) on the two-dimensional plane of a cumulative effect, based on this principle, this paper established a two-dimensional radiation and the three-dimensional radiant energy (temperature) distribution of the mathematical relationship between temperature and colorimetric method Starting with, theoretically solved the difficulty of quantitative conversion from the radiation energy to the gray scale of the image, making this method becomes easy. Finally, the feasibility of this method is analyzed, and the ways to improve the measurement accuracy are discussed. This method is easy to be extended to the detection of three-dimensional temperature distribution of combustion engine, aero-engine combustion and other occasions.