小波变换用于图像去噪可以很好的解决物体的点奇异特性，本算法采用各种阈值函数对图像进行去噪，里面包含测试图像和峰值信噪比-Wavelet transform for image denoising can solve the body good point singularity, the algorithm used for image denoising threshold function, which contains the test image and the peak signal