关键词:图像质量评价; 人眼视觉系统; 梯度; 离焦模糊图像
Defocused image quality assessment based on gradient and HVS
HUANG Long-hua1, CHEN Zhi-hui1, PENG Xiao-ning1, WANG Zheng-you2
(1.Dept. of Computer Science & Technology, Huaihua University, Huaihua Hunan 418008, China; 2.School of Information Technology, Jiangxi University of Finance & Economics, Nanchang 330013, China)
Abstract:Based on the latest study on human visual system(HVS) characteristics,this paper proposed the assessment model of the defocused image quality based on thegradient and HVS characteristics (GVSSIM). This model took use ofthe Sobel edge gradient operator to extract the gradient information of the image, and weighed the formula in accordance with the characteristics of HVS to get the similarit assessment indicators of the new structure, and accessed to the image quality assessment indicators. This method is characteristics of simple computation and the assessment result of the defocused image better reflect the human subjective feeling compared with the SSIM evaluation model. ......