pcl的一个点云处理的源代码，可以实现点云的可视化，查看点云特征。-pcl a point cloud processing source code, can achieve point cloud visualization view point cloud features.

实现指纹图像的细化。 实现指纹图像的特征点提取。 实现特征图像的细化去伪。 编写代码实现上述功能。(The thinning of the fingerprint image is realized. The feature point extraction of fingerprint image is realized. To realize the refinement of the feature image. Write the code to implement t