图像质量评价代码

psnr_val=peak_signal_noise_ratio(im1_t, im2_t)
ssim_val=structural_similarity(im1_t,im2_t,win_size=11,gaussian_weights=True,multichannel=True,data_range=1.0,K1=0.01,K2=0.03,sigma=1.5)