中文说明：
对比BP，OMP，StOMP对自然图像的重构效果,输入图像是一幅256*256的lena图像，我们使用压缩采样后，再用上述三种方法对其进行重构，比较其结果，其中StOMP方法是用不同的阈值
English Description：
Compared with BP, OMP, StOMP reconstruction effect of natural images, the input image is a picture of 256 * 256, Lena image, we use after compression, sampling, then use the above three methods for reconstruction, compare the results, including StOMP method is to use a different threshold