移动显示液晶屏上视频图像质量研究

在较低帧率下,移动显示液晶屏上主观图像质量与视频图像内容相关。文章提出一种新的视频图像内容运动特征提取方法,即首先计算每帧视频图像的运动矢量场,通过进一步计算每帧运动矢量的熵值和均值来描述和量化视频图像内容的运动特征。采用主观视觉实验研究了不同帧率下不同视频图像内容的主观图像质量。实验数据分析表明,运动矢量熵值和均值与液晶显示屏上运动图像模糊和运动不连续等显示失真现象具有较高的相关性。本文提出的视频图像内容运动特征提取方法为液晶显示屏视频驱动方法的优化和改进提供了依据,并且其研究结果可应用于视频图像内容提取的相关算法中。

Video Quality Assessment on Mobile Liquid Crystal Display

The subjective image quality on mobile liquid crystal display has a strong correlation with the video content at lower frame rates.By carefully calculating the motion vectors for each frame of video,a novel method to retrieve video content motion information was proposed,which uses the calculated entropy and mean values of the motion vectors to indicate the motion character of the video content.Subjective visual perception experiment was performed to evaluate the image quality for different videos at different frame rates.The data analysis implies that the entropy and mean values of motion vectors were strongly correlated with the motion blurring and judder artifacts which were perceived on liquid crystal display.The proposed video content motion information retrieval method can be used to further optimize and improve the drive scheme of liquid crystal display;it can also be used in the video content retrieval algorithms.