基于JPEG压缩的无参考图像质量评价算法，输入一幅图像，输出图像的评价值，值在0-100之间，越接近0图像的质量越好-JPEG-based compression algorithm for no-reference image quality assessment, an input image, the output image　uation value, a value between 0-100, closer to 0 the better the image quality