PROBLEM TO BE SOLVED: To provide an eyelid opening detector that detects eyelid opening of a subjects eye.SOLUTION: An eyelid opening detector comprises an image sensor 144 that receives a front eye part image of a subjects eye, and eyelid opening determination means 300 for detecting eyelid opening of the subjects eye from an image signal of the image sensor 144. The eyelid opening determination means 300 detects the eyelid opening of the subjects eye on the basis of the image signal in a predetermined area including an upper part of a pupil image formed on the image sensor 144.COPYRIGHT: (C)2014,JPO&INPIT【課題】被検眼の開瞼を検出する開瞼検出装置を提供する。【解決手段】被検眼の前眼部像を受像するイメージセンサ144と、このイメージセンサ144の画像信号から被検眼の開瞼を検出する開瞼判定手段300とを備えた開瞼検出装置であって、開瞼判定手段300は、イメージセンサ144上に形成される瞳孔像の上部部分を含む所定領域の画像信号に基づいて、被検眼の開瞼を検出する。【選択図】図5
