摘要
针对彩色逆半调图像提出一种基于空间信息的质量评价方法。首先,将图像变换到视觉均匀颜色空间S-CIELab空间,通过定义人眼感知色差图像和感知梯度图像,构造评价彩色逆半调图像质量的定量指标。仿真结果表明:该指标反映的结果符合人眼视觉特性,与人的主观评价结果基本一致,它为基于图像内容的彩色逆半调方法的设计提供了依据。
A quality assessment method was proposed for color inverse halftoning based on space information. Firstly, the study transformed the inverse halftoning image and the original image into S-CIELab color space, by defining perception color difference and perception gradient, a quantitative index is constructed for apraising the color inverse halftoning image. Experiments show that the index reflects is consistent with the result of the subject assessment. It helps to design more efficient color inverse halftoning algorithms based on image content.
出处
《计算机应用》
CSCD
北大核心
2009年第6期1699-1701,共3页
journal of Computer Applications
关键词
彩色逆半调
感知色差
感知梯度
质量评价
color inverse halftoning
perception color difference
perception gradient
quality assessment
