包括最后计算压缩图像的峰值信噪比和压缩效果的源码,基于K均值的PSO聚类算法,从先验概率中采样，计算权重。- Including the final calculation of the compressed image peak signal to noise ratio and compression of the source, K-means clustering algorithm based on the PSO, Sampling　a priori probability, calculate the weight.