Eyelid opening level determination device and computer readable medium storing computer program thereof

A computer readable medium storing a computer program, comprising:

• a face image taking unit for taking a face image;
• an upper eyelid detection unit for detecting an upper eyelid in the face image which is taken by the face image taking unit;
• a lower eyelid area setting unit for setting an area for searching a lower eyelid based on the upper eyelid detected by the upper eyelid detection unit;
• an edge group detecting unit for detecting an edge group where brightness changes from dark to bright as a lower eyelid candidate by scanning the area set by the lower eyelid area setting unit from an upper side to a lower side;
• a reliability value obtaining unit for obtaining a reliability value of the edge group detected by the edge group detecting unit;
• a lower eyelid determination unit in which the edge group having the reliability value exceeding a predetermined value in the edge group detected by the edge group detecting unit is determined to be the lower eyelid;
• and
• an eyelid opening level obtaining unit for obtaining opening level of the eyelid based on positions for the upper eyelid and the lower eyelid.