该实例程序通过改进灰度直方图双峰法，实现了迭代求全局最佳阈值，对于前背景灰度范围差异明显的图像有良好的分割效果。(By improving the gray histogram Shuangfeng method, the example program achieves the global optimum threshold by iteration, and has good segmentation effect for the images with obvious differences in the gray range of the previous background.)