Screen display system and screen display program

A screen display system comprising:

• a display means having an image display surface of a first size;
• a position detection means for detecting a line-of-sight position of a user who exists in a predetermined area in front of the image display surface;
• and
• a screen processing means for displaying on the image display surface a small screen of a second size that is smaller than the first size in accordance with the line-of-sight position of the user detected by the position detection means;
• wherein,
• the position detection means includes:
• three-dimensional patterns concerning body shapes and postures of a plurality of persons;
• a first detection means for making a determination as to whether a detected object is a person by comparing a detected shape with the three-dimensional patterns;
• a second detection means for detecting a three-dimensional position of the head of a detected user when the detected object is a person;
• and
• a correction means for calculating a line-of-sight position from the three-dimensional position of the head of the detected user in a predetermined way.

A screen display program that can be read by a computer that displays information on a display means having an image display surface of a first size, the screen display program causing the computer to execute:

• a position detection step of detecting a line-of-sight position of a user who exists in a predetermined area in front of the image display surface;
• and
• a screen processing step of displaying on the image display surface a small screen of a second size that is smaller than the first size in accordance with the line-of-sight position of the user detected by the position detection step;
• wherein,
• the computer includes:
• three-dimensional patterns concerning body shapes and postures of a plurality of persons;
• the position detection step comprises:
• a first detection step of making a determination as to whether a detected object is a person by comparing a detected shape with the three-dimensional patterns;
• a second detection step of detecting a three-dimensional position of the head of a detected user when the detected object is a person;
• and
• a correction step of calculating a line-of-sight position from the three-dimensional position of the head of the detected user in a predetermined way.