Media display system and adjustment method therefor

A media display system comprising:

• an electronic billboard attached to a bracket;
• a camera mounted on a midline in height of the electronic billboard, to capture an image of a viewer;
• a driving apparatus to adjust a position of the electronic billboard relative to the bracket for changing a height of the electronic billboard;
• a processing unit;
• and
• a storage unit connected to the processing unit, the camera, and the driving apparatus, and storing a plurality of programs to be executed by the processing unit, wherein the storage unit comprises:
• a facial detecting module to detect a face region in the image;
• a midline determination module to obtain a midline of the image;
• a comparison module to compare a reference eyeline of the face region with the midline of the image to determine whether the reference eyeline of the face region and the midline of the image overlap, and output a comparison signal correspondingly;
• and
• a control module to control the driving apparatus to move the billboard according to the comparison signal;
• wherein the reference eyeline is a horizontal line passing through two eyes in the face region, the midline of the image is parallel to the reference eyeline;
• in response to the reference eyeline being higher than the midline of the image, the control module directs the driving apparatus to move the electronic billboard up;
• in response to the reference eyeline being lower than the midline of the image, the control module directs the driving apparatus to move the electronic billboard down;
• and in response to the reference eyeline and the midline of the image overlapping, the control module stops the driving apparatus, and the viewer can comfortably view the electronic billboard.