论文部分内容阅读
结合Abel变换和离散坐标法,提出了一种基于CCD相机采集的单幅辐射图像重建轴对称发射-吸收介质内辐射源项分布的反演算法。通过在求解辐射正问题得到的准确值的基础上,添加随机噪声模拟试验测量数据,分析了网格数目、辐射源项分布形式、吸收系数和测量误差对算法反演精度的影响。测试结果表明:该算法对测量误差不敏感,在有测量误差的情况下也能够准确的重建介质内的辐射源项分布。
Combined with Abel transform and discrete coordinate method, an inversion algorithm based on single camera radiation image reconstruction CCD camera is proposed to reconstruct the distribution of radiation source in axisymmetric transmit-receive medium. Based on the exact value obtained by solving the radiation problem, the random noise simulation test data are added to analyze the influence of the number of grids, the distribution form of radiation source, the absorption coefficient and the measurement error on the inversion accuracy of the algorithm. The test results show that the proposed algorithm is insensitive to the measurement error and can accurately reconstruct the distribution of radiation source in the medium with the measurement error.