Using image processing methods to reduce dazzle in the eyes from a digital projector

摘要

When someone is standing in front of a presentation screen, the contrast between the projector light and the indoor illumination is, as a rule, too great. This causes frequent contraction of the pupils of a person's eyes and thereby great discomfort. In this paper we use the image processing method to reduce the light intensity towards a person's face to the approximate level of the indoor illumination, thus reducing the pupil contraction frequency. Our design proposes three methods by using both the current computer vision technology-motion detection and face detection. Motion detection tracks the person's location and infers the head position. Face detection, by using a combination of the two methods, tracks the location and speeds up the face examination process. These three methods all use a black oval mask to cover the face so that the eyes can avoid any dazzling light.