2 LEVEL DROWSY DRIVING PREVENTION APPARATUS THROUGH MOTION, FACE, EYE,AND MOUTH RECOGNITION

摘要

A drowsiness decision unit receives images and 3-dimensional depth information from a driving decision unit that includes: a GPS to measure the driven state of a user′s vehicle; an infrared depth sensor that is installed in a location that is able to observe a user′s face; and a photographing unit that includes an infrared camera and makes a first stage decision that is determined based on a user′s behavior including the intervals between yawns, the speed and frequency of head nodding, and the speed and frequency of eye blinking to generate a ″precaution″ when signs of drowsy driving appear. Accordingly, a second stage decision is determined by inspecting the closed state of the pupils, whether the direction of the gaze is forward or not, and the angle of the head to generate a ″caution″ through a caution unit when drowsy actions are detected. The decisions in two stages based on various determination criteria which include a user′s behavior, face, pupils and mouth shape may precisely determine only drowsy driving behavior to prevent traffic accidents, human casualties and economic loss that occur due to drowsy driving, and which exclude the closed state of the pupils, the gaze in a non-frontal direction, and lowering of the head that are not due to drowsiness. [Reference numerals] (AA) TRANSMIT SENSING ORDER FOR FORWARD DRIVING / TRANSMIT STOP ORDER FOR STOP OR REVERSE DRIVING; (BB) PHOTOGRAPHING UNIT; (CC) INFRARED DEPTH SENSOR; (DD) INFRARED CAMERA; (EE) TRANSMIT IMAGE AND SENSOR INFORMATION; (FF) TRANSMIT GPS INFORMATION; (GG) DRIVING DECISION UNIT; (HH) TRANSMIT INFORMATION FOR WHETHER TO DRIVE OR NOT; (II) CONTROLLER; (JJ) TRANSMIT ORDER FOR FIRST STAGE SIGNS OF DROWSINESS DURING FORWARD DRIVING; (KK) TRANSMIT THAT THERE ARE SIGNS OF DROWSINESS DETECTED; (LL) TRANSMIT SECOND STAGE DROWSY ACTION DECISION ORDER; (MM) TRANSMIT INFORMATION THAT DROWSY ACTION IS DETECTED; (NN) FIRST STAGE SIGNS OF DROWSINESS DECISION UNIT; (OO) SECOND STAGE DROWSY ACTION DECISION UNIT; (PP) DROWSINESS DECISION UNIT; (QQ) CENTRAL PROCESSING UNIT; (RR) FIRST STAGE ORDER FOR TRANSMISSION OF PRECAUTION FOR SIGNS OF DROWSY BEHAVIOR; (SS) SECOND STAGE ORDER FOR TRANSMISSION OF CAUTION FOR DROWSY ACTION BEHAVIOR; (TT) CAUTION UNIT; (UU) SIGNAL