Method for determining ocular measurements using a consumer sensor

A method for determining at least one ocular measurement (interpupillary distance, monocular pupillary distance and/or pupillary heights) of a user from at least one image of the user's head acquired by a mass-market digital image sensor, the user seeing in real time said at least one image of his head displayed on a display screen, the method comprises steps of:

• determining a tridimensional orientation of the face of the user compared to the image sensor by a face tracking system executed by a processor;
• displaying visual landmarks on said at least one image displayed on the display screen to guide the tridimensional orientation of the user's head compared to the image sensor in relation with a feedback provided by the face tracking system;
• determining said at least one ocular measurement by the processor on said at least one image from a measurement of an object comprised in the image by determining the tridimensional orientation of the object and by scaling between a size of the projected object and a pixel size of said at least one image, the object having a known size;
• and
• tracking a position and the tridimensional orientation of the user's face in real time, and determining the visual landmarks according to the position and the tridimensional orientation of the user's face at each instant.