Equipment and method for detecting head posture

The invention provides equipment and a method for detecting a head posture. The equipment for detecting the head posture comprises a multi-visual-angle image acquiring unit, a front human face image estimation unit, a head posture estimation unit and a coordinate conversion unit, wherein the multi-visual-angle image acquiring unit is used for acquiring visual angle images, which is shot from different angles, of an object; the front human face image estimation unit detects a visual angle image of a human face having a minimum yaw angle from the acquired visual angle images; the head posture estimation unit acquires a three-dimensional coordinate of a predetermined human face characteristic point from a human face three-dimensional model, detects the predetermined human face characteristic point and a two-dimensional coordinate of the predetermined human face characteristic point from the detected visual angle image, and calculates a first head posture relative to image capturing equipment for shooting the visual angle image of the human face having the minimum yaw angle according to the two-dimensional coordinate and the three-dimensional coordinate of the predetermined human face characteristic point; and the coordinate conversion unit converts the first head posture into a second head posture represented by a world coordinate system according to the world coordinate system coordinates of the image capturing equipment.