基于针孔成像模型的炉膛辐射成像快速算法

A Fast Algorithm for Calculation of Radiative Energy Distribution Received by Pinhole Image Formation Process

提出了一种结合蒙特卡罗方法的在针孔成像模型下炉膛网格单元对CCD各像素辐射能份额的快速计算方法 .相对蒙特卡罗方法 ,快速算法提高运算速度 5 0倍以上 ,同时还可以直接考虑景深对成像的影响 .通过二维条件下的比较计算 。

A fast algorithm was proposed for calculating the radiative energy distribution received by pinhole image formation process. The core was dividing the total energy received by image formation elements into the direct and indirect parts in the processes. The indirect energy was related with the direct part, and the latter was calculated through a concept of effective angle factor for image formation. The results obtained by the fast algorithm approached the statistical average values calculated using the Monte Carlo method. The agreement of the results reached by the two methods validated the fast algorithm. The computation time can be saved nearly 50 times by the fast algorithm compared with the Monte Carlo method. The influence of CCD camera′s focal length of the lens will be treated directly in fast algorithm. The fast algorithm is reliable and efficient for applications.