Portable eye tracking device

Abstract

A portable eye tracker device is disclosed which includes a frame, at least one optics holding member, and a control unit. The frame may be adapted for wearing by a user. The at least one optics holding member may include at least one illuminator configured to selectively illuminate at least a portion of at least one eye of the user, and at least one image sensor configured to capture image data representing images of at least a portion of at least one eye of the user. The control unit may be configured to control the at least one illuminator for the selective illumination of at least a portion of at least one eye of the user, receive the image data from the at least one image sensor, and calibrate at least one illuminator, at least one image sensor, or an algorithm of the control unit.

What is claimed is: 
     
         1 . A wearable device comprising:
 at least one illuminator configured to illuminate at least a portion of at least one eye of a user when activated; and   at least one image sensor configured to provide first image data representative of images of the at least one eye of the user; and   one or more processors configured to:
 activate, selectively, the at least one illuminator; 
 receive the first image data from the at least one image sensor; 
 calibrate, based at least in part on the first image data, an algorithm executable by the one or more processors to determine a gaze direction of the user; 
 determine whether the algorithm has reduced in accuracy; 
 receive second image data from at least two image sensors in response to determining the algorithm has reduced in accuracy; and 
 determine a gaze direction for the user, based at least in part on the algorithm and at least one of the first image data or the second image data.