Relative luminance

Color in Digital Cinema

Published in Charles S. Swartz, Understanding Digital Cinema, 2004

Relative luminance. A white card typically reflects about 90% of the incident illumination. In the original scene, this is called diffuse white luminance. In an outdoor, sunlit scene, a diffusely reflecting white card may reach a luminance value of 10,000 cd·m-2. Very few displays can achieve luminance comparable to an outdoor scene, and in any event, such a high luminance is undesirable for imagery to be viewed indoors. Ordinarily, we seek to reproduce luminance values relative to the luminance of a reference or maximum white. We generally seek to display an image in which the relative luminance of elements in the scene is approximately reproduced.

Effects of Luminance Contrast on Depth Perception in Optical See-Through Augmented Reality

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Journal Information

Published in LEUKOS, 2023

Jingyuan Wang, Shining Ma, Yue Liu, Yongtian Wang, Weitao Song

Several relevant studies mainly focus on the relative luminance contrast between objects and background (Egusa 1982; Farnè 1977). Egusa (1982) found that when the background was darker than the target objects, the target object with the largest contrast with the background luminance was perceived as the nearest object. But there is a lack of quantitative research on luminance differences between the ambient environment and the virtual object presented in AR, and our study preliminarily fills that gap.

Relative luminance

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Color in Digital Cinema

Effects of Luminance Contrast on Depth Perception in Optical See-Through Augmented Reality