Patent ID: 7202792
Filing Date: 2007-04-10
Classification: B60K,G08B

Abstract:
1. A system for monitoring an eye of a person and detecting drowsiness of the person, the system comprising: a video imaging camera oriented to generate images of an eye of a person; and a processor for processing the images generated by the video imaging camera, said processor monitoring the images of the eye and determining whether the eye is in one of an open position and a closed position, wherein the processor determines that the eye is in the closed position when at least one of a sclera and an iris of an eye is not visible in the image, said processor determining a time proportion of eye closure as a number of video image frames that the eye is determined to be in the closed position as compared to the total number of video frames within a time interval and further determining a drowsiness condition when the time proportion of eye closure exceeds a threshold value.