THE INFLUENCE OF VIDEO IMAGE SIZE AND RESOLUTION ON VIEWING-DISTANCE PREFERENCES
THE INFLUENCE OF VIDEO IMAGE SIZE AND RESOLUTION ON VIEWING-DISTANCE PREFERENCES
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DOI：
10.5594/j15915
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发表时间：
1993-05-01
期刊：
影响因子：
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通讯作者：
LUND, AM
中科院分区：
文献类型：
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作者：
LUND, AM
本文介绍了五个实验，进行评估观看距离的偏好作为视频图像的大小和分辨率的函数。观看距离偏好是视频电话会议、远程学习和其他多媒体应用中涉及人为因素的工作的关键设计参数。此外，观看距离偏好已被视为图像质量的主观度量，并用于正在进行的高清晰度电视（HDTV）拟议标准的讨论中。基于先前的文献，假设观看距离偏好与图像高度的比率将是恒定的，将基于图像分辨率而变化，并且对于标准的视频分辨率（具有525扫描线的分辨率），平均值约为7。与预测相反，数据显示，该比率随着图像大小的增加而减小，并且该比率相对不受图像分辨率的影响。五个实验的数据相结合，以产生一个准则，估计观看距离的偏好在广泛的视频图像大小。
This article describes five experiments that were conducted to evaluate viewing-distance preferences as a function of video image size and resolution. Viewing-distance preferences are a key design parameter for work involving human factors in video teleconferencing, distance learning, and other multimedia applications. In addition, viewing-distance preferences have been treated as a subjective measure of image quality and used in ongoing discussions of proposed standards for high-definition television (HDTV). Based on previous literature, it was hypothesized that the ratio of viewing-distance preferences to image height would be a constant, would vary based on image resolution, and would average around 7 for standard NTSC video (with 525 scan lines of resolution). Contrary to the predictions, the data showed that the ratio decreases as image size increases, and that the ratios are relatively uninfluenced by image resolution. The data for the five experiments were combined to generate a guideline for estimating viewing-distance preferences across a wide range of video image sizes.