Fig. 1. Detection of pupillary aperture. Captured images of NIR camera for (A) the pupil with a full shot and (B) the pupil occluded by the eyelid. Segmented images for (C) the pupil with a full shot and (B) the pupil occluded by the eyelid. The green lines indicate the detected boundary of the pupil. The area and the center of the contour are calculated to access the pupil size and location. The occluded pupil was identified by the ratio of vertical and horizontal length, and was removed in the analysis.
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