针对数字图像利用信息熵标准结合阈值迭代法进行图像分割，以提高图像分割的准确性。设计信息熵算法并程序实现，仿真结果表明编写程序有效，分割效果明显。(this thesis makes a research on the image segmentation technique which is the combination of standard information entropy and Iteration threshold.Meanwhile this thesis designs entropy algorithm and gives its program. Simulation results show that program runs well, segmentation result is effective.)