Equipment and method for detecting head posture

Abstract

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.

Description

technical field [0001] The present invention relates to head posture detection, and more specifically, relates to a head posture detection device and method using a three-dimensional model. Background technique [0002] Head posture and motion detection is a technology commonly used in the field of human-computer interaction, and various controls can be realized by detecting head posture. For example, by detecting people's head posture to detect people's line of sight, thereby performing various control applications according to the line of sight or directly according to people's head posture (for example, controlling the cursor on the screen by detecting people's line of sight or head posture) Move); remind the driver to pay attention to driving safety by detecting the driver's head posture; automatically adjust the screen angle of the display device by detecting the audience's head posture, etc. [0003] Currently, there are mainly two techniques for detecting head poses....

AI Technical Summary

Problems solved by technology

Because this method uses the epipolar geometry method, it needs to obtain the frontal image in advance and there are constraints on the positional relationship between the face and the camera, so it is difficult to obtain accurate pose information on any face and any relative position

[0007] Since the accuracy of the head posture detection technology in the prior art is poor, and the head posture information cannot be detected for any object, a method and device for conveniently and accurately detecting the head posture are needed

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