Determination method and device for opening and closing distance of eye

Abstract

The invention discloses a determination method and device for an opening and closing distance of an eye. The method comprises the following steps: obtaining a target three-dimensional face model of a person to be detected; fitting three-dimensional position information corresponding to an eyeball center corresponding to a target eye based on three-dimensional position information corresponding to a first specified feature point, a second specified feature point and a third specified feature point and three-dimensional position information corresponding to an upper eyelid point, a lower eyelid point and two canthus points of the target eye; determining first projection position information corresponding to the upper eyelid point projected to an eyeball surface corresponding to the target eye and second projection position information corresponding to the lower eyelid point projected to the eyeball surface corresponding to the target eye based on the three-dimensional position information corresponding to the eyeball center corresponding to the target eye and the three-dimensional position information corresponding to the upper eyelid point and the lower eyelid point; and determining an opening and closing distance of the target eye based on the first projection position information and the second projection position information so as to improve accuracy of determining the opening and closing distance of the eye.

Description

technical field [0001] The present invention relates to the field of image recognition, in particular to a method and device for determining the distance of opening and closing of eyes. Background technique [0002] At present, in the relevant fatigue state detection process, it is generally: to monitor the face of the person to be detected, determine the opening and closing length of the eyes of the person to be detected based on the monitoring screen, and then determine according to the opening and closing length of the eyes of the person to be detected Whether the person to be detected is in a fatigue state, and an alarm will be given if the person to be detected is in a fatigue state. [0003] In the above process, in the process of determining the opening and closing length of the eyes of the person to be detected based on the monitoring screen, the upper and lower eyelids of the eyes are generally detected from the monitoring screen, and then, based on the distance bet...

AI Technical Summary

Problems solved by technology

[0004]However, due to the difference in eye structure, such as eyes with bulging eyelids, in the process of determining the opening and closing distance of the eyes based on the distance between the upper and lower eyelids , it may appear that the distance calculated based on the upper and lower eyelids of the eye with bulging eyelids is greater than the distance calculated based on the upper and lower eyelids of the normal eye due to the eyelid bulge, where the normal eye is the eye whose eyelid fits the eyeball. To a certain extent, it affects the actual opening and closing distance determination results of the eyes, which in turn affects the detection results of the fatigue state

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