说明：  1、实现图像的阈值分割，并分析阈值选择对分割结果的影响。 2、实现图像的边缘检测，分析不同算子边缘检测结果。
(1. The threshold segmentation of image is realized, and the influence of threshold selection on segmentation result is analyzed. 2.Realize the image edge detection and analyze the edge detection results of different operators.)