图像信噪比反映了图像的对比度。图像相似性评估与信噪比密切相关，通常在MATLAB环境下进行。

简介：
The Signal-to-Noise Ratio (SNR) plays a crucial role in assessing the quality of an image. Specifically, it directly impacts the images contrast, which is fundamental to visual perception. Furthermore, SNR is closely linked to the degree of similarity observed between different images. This analysis is often conducted using MATLAB, a powerful computational environment for implementing and evaluating these measurements.