Method and device for determining inclination angle of front face

Abstract

The invention provides a method and a device for determining the inclination angle of a front face and relates to the technical field of face recognition technology. The method comprises the steps that a three-dimensional face image of a target object is acquired, and a right-eye inner canthus point, a left-eye inner canthus point, a lower-right eyelid margin bottom point and a right labial anglepoint in the three-dimensional face image are determined; and based on a plane formed by a first reference line and a second reference line, the inclination angle of the front face is determined, wherein the first reference line is a connection line of the right-eye inner canthus point and the left-eye inner canthus point, and the second reference line is a connection line of the lower-right eyelid margin bottom point and the right labial angle point. Through the method and the device, the 2D reference plane can be effectively acquired, and therefore facial part data such as the length-to-width ratio, trisection length and part forms of the face can be accurately measured finally.

Description

technical field [0001] The invention relates to the technical field of face recognition, in particular to a method and a device for determining the tilt angle of a frontal face. Background technique [0002] At present, the reference plane of the face is selected in medicine for the location of the feature points of the human face bones through manual methods such as X-ray pictures, CT pictures or hand touch. The 3D scanned face image shows the shape of the surface of the face, and the bone feature points are covered by the epidermis, so it is impossible to locate the bone feature points. Therefore, it is impossible to obtain an effective 2D reference plane, which eventually leads to the inability to accurately measure face part data such as face aspect ratio, triangular length, and part shape. Contents of the invention [0003] In view of this, the purpose of the present invention is to provide a method and device for determining the tilt angle of the frontal face, so as...

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Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a method and device for determining the tilt angle of the frontal face, so as to alleviate the technical problem that an effective 2D reference plane cannot be obtained

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