A Video Quality Assessment Metric Based on Human Visual System

A Video Quality Assessment Metric Based on Human Visual System
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基于人类视觉系统的视频质量评估指标

DOI:
10.1007/s12559-010-9040-9
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发表时间:
2010-05
影响因子:
5.4
通讯作者:
Dacheng Tao
Dacheng Tao
中科院分区:
计算机科学2区
文献类型:
--
作者:
Wen Lu;Xuelong Li;Xinbo Gao;Wenjian Tang;Jing Li;Dacheng Tao

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设计一种有效的视频质量度量方法对实际应用具有重要意义。最可靠的方法是主观评价。因此,通过模拟人类视觉系统(HVS)来设计客观的评价指标是合理可行的。提出了一种基于视觉感知的视频质量评价指标。该方法利用三维小波对视频进行分解,提取特征以模拟人眼视觉系统的多通道结构,并利用时空对比敏感度函数(S-T CSF)对三维小波系数进行加权以模拟人眼的非线性特征。在S-T CSF滤波后,利用感知阈值获得视觉敏感系数。对视觉敏感系数进行归一化表示,计算参考视频和失真视频之间的视觉敏感误差。最后,时间感知机制被应用于计算视频质量的值,以减少计算成本。实验结果表明,该方法优于大多数现有的方法,并与LHS和PVQM相媲美。
It is important for practical application to design an effective and efficient metric for video quality. The most reliable way is by subjective evaluation. Thus, to design an objective metric by simulatinghuman visual system(HVS) is quite reasonable and available. In this paper, the video quality assessment metric based on visual perception is proposed. Three-dimensional wavelet is utilized to decompose video and then extract features to mimic the multichannel structure of HVS.Spatio-temporal contrast sensitivity function(S-T CSF) is employed to weight coefficient obtained by three-dimensional wavelet to simulate nonlinearity feature of the human eyes. Perceptual threshold is exploited to obtain visual sensitive coefficients after S-T CSF filtered. Visual sensitive coefficients are normalized representation and then visual sensitive errors are calculated between reference and distorted video. Finally, temporal perceptual mechanism is applied to count values of video quality for reducing computational cost. Experimental results prove the proposed method outperforms the most existing methods and is comparable to LHS and PVQM.
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