Method of measuring morpho-geometrical parameters of a person wearing eyeglasses

摘要

A method of measuring morpho-geometrical parameters of a person wearing eyeglasses includes causing the person to observe a point situated in front at infinity while holding the head naturally on a direction (24) that is substantially horizontal, acquiring a first image of the position of the frame (21) in this first posture, causing the person to observe the target (8, 18) placed in a known position relative to the image acquisition system, by adopting a position that is natural and comfortable and that involves at least a tilting movement of the head; acquiring a second image of the position of the frame (21) in this second posture, determining the positions of the eyes (27) from one of the two images, computer processing of the two images obtained in order to determine the morpho-geometrical parameters of the person, and delivering the results of the measurements.

主权项

1. A measurement method for measuring morpho-geometrical parameters of a person wearing eyeglasses, said method implementing an independent computer device having a screen, a target, a compact image acquisition system including means for determining its angle of inclination, said system being connected to said screen, and a computer enabling the image acquisition system to be controlled and enabling the images obtained to be processed, said method comprises the steps of:
causing the person to observe a point situated in front and at infinity while holding the head naturally in a substantially horizontal direction, the pair of eyeglasses occupying a natural position on the person's face; acquiring a first image of the position of the frame in this first posture; causing the person to tilt their to observe the target placed in a known position relative to the image acquisition system other than said point from said first image, where said person continues to adopt a position that is natural and comfortable, the pair of eyeglasses conserving an unchanged position on the person's face relative to the first posture; acquiring a second image of the position of the frame in this second posture, by means of the same image acquisition system as was used for the first posture; determining the positions of the eyes from one of the two images; computer processing of the two images obtained in order to determine the morpho-geometrical parameters of the person from the positions of the eyes, from the position of the frame in the first posture, from the position of the frame in the second posture, and from the angle of inclination of the image acquisition system, said processing including a calculation correction to take account of a difference in inclination of the plane of the person's face relative to the gaze axis from the eyes to the gaze point, between the first and second positions; and providing the results of the measurements.