Digital video quality metric based on human vision

被引:242
作者
Watson, AB [1 ]
Hu, J [1 ]
McGowan, JF [1 ]
机构
[1] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA
基金
美国国家航空航天局;
关键词
D O I
10.1117/1.1329896
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The growth of digital video has given rise to a need for computational methods for evaluating the visual quality of digital video. We have developed a new digital video quality metric, which we call DVQ (digital video quality) [A. B. Watson, in Human Vision, Visual Processing, and Digital Display VIII, Proc. SPIE 3299, 139-147 (1993)]. Here, we provide a brief description of the metric, and give a preliminary report on its performance. DVQ accepts a pair of digital video sequences, and computes a measure of the magnitude of the visible difference between them. The metric is based on the discrete cosine transform. It incorporates aspects of early visual processing, including light adaptation, luminance, and chromatic channels; spatial and temporal filtering; spatial frequency channels; contrast masking; and probability summation. It also includes primitive dynamics of light adaptation and contrast masking. We have applied the metric to digital video sequences corrupted by various typical compression artifacts, and compared the results to quality ratings made by human observers. (C) 2001 SPIE and IS&T.
引用
收藏
页码:20 / 29
页数:10
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