中文说明：本代码为matlab平台开发用于计算图像的亮度。BRISQUE 算法对图像亮度去相关，提取亮度归一化系数向量与自然图像相应特征向量对比，以实现对图像失真评分。用matlab编写的功能函数，可编程使用。
English Description：
This code is developed for MATLAB platform to calculate the brightness of the image. BRISQUE algorithm decorrelates the brightness of the image, extracts the normalized coefficient vector of the brightness and compares it with the corresponding feature vector of the natural image, so as to score the image distortion. The function written by Matlab is programmable.