本文探讨了在测定辐射成像系统的检测灵敏度（对比度灵敏度、图像质量指示器灵敏度）时，用计算机代替人眼对检测图像进行判别的原理、方法以及实际应用时存在的一些问题，确定并实现了一套初步可行的算法。根据此算法编制的程序对清华大学集装箱辐射成像检测系统实测图像的检测结果与人眼观察结果基本符合。 This paper discusses the principle, method and some problems existing in the application of computer to replace the human eye in detecting the detection sensitivity (contrast sensitivity, image quality indicator sensitivity) of the radiometric imaging system, and determines and realizes A set of preliminary feasible algorithm. According to the program compiled by this algorithm, the detection results of the measured images of the container radiation imaging inspection system of Tsinghua University are basically in line with the human eye observation results.