Patent ID: 8693784
Filing Date: 2014-04-08
Classification: G06K,G06T

Abstract:
1. An eyelid detection device, comprising: a generation section that, based on an image of an eye containing region, generates a first order edge image representing a magnitude of pixel value change in a specific direction for each pixel in the region, and generates a second order edge image representing a rate of change in the specific direction of the magnitude of pixel value change in the specific direction for each pixel in the region; a feature amount computation section that shifts the first order edge image or the second order edge image in the specific direction according to a cycle of a pixel value change frequency of an eyelid boundary in the image, and computes a feature amount for each pixel based on pixel values of the pixels in the first order edge image and pixel values of the pixels in the second order edge image; and an eyelid detection section that, based on the feature amount computed for each of the pixels, detects at least one of a boundary between an upper eyelid and an eyeball or a boundary between a lower eyelid and the eyeball.