Open or closed eye determination apparatus, open or closed eye determination method, and recording medium for open or closed eye determination

An open or closed eye determination method comprising:

• acquiring video data from a camera;
• detecting a face orientation based on a face image in the video data acquired;
• extracts an eye image including an eye region based on the face image in the video data acquired;
• and
• determining an open or closed eye state based on an amount of eye openness acquired from the eye image, an open eye reference value, and a closed eye reference value, wherein
• the determining has the open eye reference value and the closed eye reference value corresponding to a face orientation and switches the open eye reference value and the closed eye reference value based on the face orientation detected.

A non-transitory recording medium for open or closed eye determination encoded with a program causing a computer to implement:

• acquiring video data from a camera;
• detecting a face orientation based on a face image in the video data acquired;
• extracts an eye image including an eye region based on the face image in the video data acquired;
• and
• determining an open or closed eye state based on an amount of eye openness acquired from the eye image, an open eye reference value, and a closed eye reference value, wherein
• the determining has the open eye reference value and the closed eye reference value corresponding to a face orientation and switches the open eye reference value and the closed eye reference value based on the face orientation detected.