Flynn M J, Badano A
Department of Diagnostic Radiology, Henry Ford Health System, Detroit, MI 48202, USA.
J Digit Imaging. 1999 May;12(2):50-9. doi: 10.1007/BF03168843.
Veiling glare and ambient light reflection can significantly degrade the quality of an image on a display device. Veiling glare is primarily associated with the diffuse spread of image signal caused by multiple light scattering in the emissive structure of the device. The glare ratio associated with a test image with a 1-cm-diameter black spot is reported as 555 for film, 89 for a monochrome monitor, and 25 for a color monitor. Diffuse light reflection results from ambient light entering the display surface and returning at random emission angles. The diffuse reflection coefficient (luminance/illuminance, 1/sr) is reported as 0.026 for film, 0.058 for a monochrome monitor, and 0.025 for a color monitor with an antireflective surface coating. Both processes increase the luminance in black regions and cause contrast reduction. Specular reflections interfere with detail in the displayed scene. The specular reflection coefficient (luminance/luminance) is reported as 0.011 for film, 0.041 for a monochrome monitor, and 0.021 for a color monitor with an antireflective coating.
遮光眩光和环境光反射会显著降低显示设备上图像的质量。遮光眩光主要与设备发光结构中多次光散射导致的图像信号漫射传播有关。对于一个直径为1厘米的黑点测试图像，胶片的眩光比报告为555，单色显示器为89，彩色显示器为25。漫射光反射是由环境光进入显示表面并以随机发射角度返回引起的。对于具有抗反射表面涂层的胶片，漫反射系数（亮度/照度，1/球面度）报告为0.026，单色显示器为0.058，彩色显示器为0.025。这两个过程都会增加黑色区域的亮度并导致对比度降低。镜面反射会干扰显示场景中的细节。对于具有抗反射涂层的胶片，镜面反射系数（亮度/亮度）报告为0.011，单色显示器为0.041，彩色显示器为0.021。
