Effect of Environmental Factors on Perception of Image Attributes
Experiments were conducted to measure perceptual changes in sharpness and contrast due to two environmental factors: viewing distance and ambient illumination. A field study was completed in two retail stores in which television customers were polled about image quality at long and short viewing distances. The study identified sharpness, brightness, and contrast as the perceptual attributes most influenced by changes in viewing distance. Subsequently, a viewing experiment was conducted in the laboratory in which the sizes of just noticeable differences (JNDs) of sharpness, black level, and white level were measured at different viewing distances and ambient illumination levels. The experiment used a two up, one down staircase method with a reference to detect thresholds. It was found that sensitivity to sharpness decreased with longer viewing distance and was unaffected by ambient illumination, and sensitivity to black level decreased with either increased distance or increased illumination. Sensitivity to white level was not significantly affected by either factor. These results may be used to select display settings or design parameters to suit different viewing situations.
M. J. Murdoch M. van Etten I. E. J. Heynderickx
Philips Research Laboratories, Eindhoven, The Netherlands Philips Research Laboratories, Eindhoven, The Netherlands Delft University of Technology, Delft, The
国际会议
The 31st International Congress on Imaging Science(第31届国际影像科学大会 ICIS2010)
北京
英文
153-156
2010-05-12（万方平台首次上网日期，不代表论文的发表时间）