中文说明：
SSIM索引，1.0版版权所有（c）2003周旺保留所有权利。作者是霍华德休斯医学研究所，纽约大学神经科学中心和Curand数学科学研究院计算视觉实验室，USA. He目前在加拿大滑铁卢大学电气与计算机工程系。
English Description：
SSIM index, version 1.0 Copyright (c) 2003 Zhou Wang. All rights reserved. The author is Howard Hughes Institute of medicine, Center for neuroscience of New York University and Computational Vision Laboratory of curand Institute of Mathematical Sciences. USA. He is currently in the Department of electrical and computer engineering at the University of Waterloo, Canada