运用代数迭代技术由火焰图像重建三维温度场

在运用图像处理的方法测量火焰温度场的研究中，从摄像机获取的二维累积图像中重建出包含每个断面温度分布的三维温度场，是关系到能否投入实际应用的关系问题，结合扇形计算机断层成像原理和火焰辐射传递方程，推导出辐射强度随投影路径衰减的控制方程。将火焰断面网格化之后，运用代数重建技术对离散方程温度和辐射衰减系数同时迭代求解。在油煤混烧的燃烧器上运用该方法进行实验研究，并结合算法的数值模拟，对其可能误差和改进方

Three-Dimensional Temperature Field Reconstruction from Flame Images Using Algebraic Reconstruction Technique

In the study of measuring the flame temperature field by the method of image processing,how to reconstruct the three-dimensional temperature field from two-dimensional accumulative images of the flame is the key.In this paper by combining principles of sector scanning Computer Tomography (CT) with the flame radiative transfer equation,the control equation of the radiation intensity which decays with projective paths is deduced.After dividing a flame section into M×N grids,the temperature and radiative extinction coefficient distribution were obtained by iterating the discrete equations and the Algebraic Reconstruction technique (ART) simultaneously.This method was used in experiments on a burner of mixed coal and oil.Possible error and improvement are also discussed.