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，本算法采用软硬折中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 between soft and hard threshold function, which contains the test image and the peak signal to noise ratio