An integrated design of a smartphone interface with multiple image processing methods to reduce shining light from a digital projector

Abstract

This paper proposes a smartphone application to be used in open system platforms in combination with a projector to produce a black mask which, when used together, both cover and track the speaker's face to reduce the strong light from the projector shining toward the speaker's eyes. This design uses this background subtraction technique to first eliminate the background of the captured image and then detect the skin color. In order to find the location of the speaker, this design utilizes the face detection function to locate the coordinates of the speaker's face. In addition to tracking the location of the speaker, this design also utilizes not only the eyes detection method but also the shoulder line detection method to improve the tracking speed for the coordinates of the speaker's face. This design also uses the projection screen blocks to automatically calibrate the black mask position based on the resulting distance calculation from the projector to the projection screen <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sup> .