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 differenc