Sight vector detecting method and device

A sight vector detection device comprising;

• an image capture element and a depth capture element for capturing an image of a user to obtain a first image and a distance information, respectively, and
• a processing circuit, coupled to the image capture element and the depth capture element, the processing circuit being configured for:
• based on the first image and the distance information, finding an eye center location of the user;
• based on a gaze model, predicting a user sight location to find a target object sight location of the user on a target object;
• based on the eye center location of the user, calculating a first world coordinates of the eye center of the user;
• based on the target object sight location of the user, calculating a second world coordinates of the target object sight location of the user;
• and
• based on the first world coordinates of the eye center of the user and the second world coordinates of the target object sight location of the user, calculating a sight vector of the user.