The PSNR value of the restored image “Moon” with optimal values of β1, β2, α1 and α2 is 26.23.

Parameter sensitivity analysis for our proposed model M2 by percentage decreased in values of the parameters β1, β2, α1 and α2, with the resultant percentage increase or decrease in PSNR of the de-noised image of size (3002).针对本文提出的模型M2，以参数β₁、β₂、α₁和α₂的取值按百分比递减的方式开展参数敏感性分析，同时考察尺寸为3002的去噪图像的峰值信噪比（Peak Signal-to-Noise Ratio，PSNR）随之产生的百分比增减变化。