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首页> 外文期刊>IEEE Transactions on Circuits and Systems for Video Technology >Subjective evaluation of stereoscopic images: effects of camera parameters and display duration
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Subjective evaluation of stereoscopic images: effects of camera parameters and display duration

机译：立体图像的主观评估：相机参数和显示持续时间的影响

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Two experiments are presented that were aimed to investigate the effects of stereoscopic filming parameters and display duration on observers' judgements of naturalness and quality of stereoscopic images. The paper first presents a literature review of temporal factors in stereoscopic vision, with reference to stereoscopic displays. Several studies have indicated an effect of display duration on performance-oriented (criterion based) measures. The experiments reported were performed to extend the study of display duration from performance to appreciation-oriented measures. In addition, the present study aimed to investigate the effects of manipulating camera separation, convergence distance, and focal length on perceived quality and naturalness, In the first experiment, using display durations of both 5 and 10 s, 12 observers rated the naturalness of depth and the quality of depth for stereoscopic still images. The results showed no significant main effect of the display duration. A small yet significant shift between naturalness and quality was found for both duration conditions. This result replicated earlier findings, indicating that this is a reliable effect, albeit content-dependent. The second experiment was performed using display durations ranging from 1 to 15 s. The results of this experiment showed a small yet significant effect of display duration. Whereas longer display durations do not have a negative impact on the appreciative scores of optimally reproduced stereoscopic images, observers do give lower judgements to monoscopic images and stereoscopic images with unnatural disparity values as display duration increases. In addition, the results of both experiments provide support for the argument that stereoscopic camera toe-in should be avoided if possible.
机译：提出了两个实验，旨在研究立体拍摄参数和显示持续时间对观察者对立体图像的自然性和质量的判断的影响。本文首先介绍了关于立体视觉的时间因素的文献综述，并参考了立体显示器。多项研究表明，显示持续时间对以性能为导向（基于标准）的度量有影响。报告的实验是为了将展示时间的研究从性能扩展到面向欣赏的措施而进行的。此外，本研究旨在研究操纵相机间距，会聚距离和焦距对感知质量和自然度的影响。在第一个实验中，使用5到10 s的显示持续时间，有12位观察者对深度的自然度进行了评估以及立体静止图像的深度质量。结果显示显示持续时间没有明显的主要影响。在两种持续时间条件下，都发现了自然与质量之间的微小但重要的变化。该结果重复了先前的发现，表明这是可靠的效果，尽管它依赖于内容。第二个实验是使用1到15 s的显示持续时间进行的。该实验的结果显示了显示持续时间的微小但显着的影响。尽管较长的显示持续时间不会对最佳复制的立体图像的欣赏分数产生负面影响，但随着显示持续时间的增加，观察者的确会对单视图像和具有不自然视差值的立体图像做出较低的判断。此外，两个实验的结果都支持以下观点：如果可能的话，应避免使用立体摄像机的前照镜。

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