Effect of Luminance and Contrast Variation on Stereoacuity Measurements Using Smartphone Technology

Figure 2

Legend of contour-based pattern of the first-grade test page with 30% contrast for a maximum brightness of 60 lux. (a) Picture viewed by the left eye. (b) Picture viewed by the right eye. (c) Simulation of the perception generated by the test images. The luminance of the dark and light elements was 32 lux (grayscale no. 39, RGB [99, 99, 99]) and 60 lux (grayscale no. 52, RGB [133, 133, 133]), respectively. The setting disparity of the stereo ring was 640″ (down), 550″ (right), 460″ (left), 370″ (up), 280″ (up), 190″ (left), 100″ (right), and 10″ (down). If the stereopsis of a subject is better than the setting disparity, the stereo target may appear out of the plane when fusing correctly.

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