Face deflection angle detection method and device and face pitch angle detection method and device

Abstract

The invention provides a face deflection angle detection method and device and a face pitch angle detection method and device, and belongs to the technical field of computers. The face deflection angle detection method comprises the following steps of: obtaining position coordinates of a nasal tip point, a first appointed point and a second appointed point in a to-be-processed face image, wherein the first appointed point and the second appointed point are symmetrically distributed relative to the nasal tip point; determining a position coordinate of a foot point from the nasal tip point to the connection line of the first appointed point and the second appointed point; and determining a face deflection angle in the to-be-processed face image on the basis of a specific value of a distance from the first appoint to the foot point to a distance from the second appointed point to the foot point. By adoption of the face deflection angle detection method, the correctness of the determined face deflection angle can be improved.

Description

Technical field [0001] The present invention relates to the field of computer technology, in particular to a method and device for detecting deflection angle and pitch angle of human face. Background technique [0002] With the development of computer technology and network technology, smart devices have gradually entered people's lives, such as smart TVs and smart refrigerators. During the use of the smart device, after the user turns the face, the smart device will determine the deflection angle of the face, and then execute the corresponding function based on the deflection angle. For example, when the user turns the face to the left at an angle greater than or equal to 15 degrees, the smart device The TV switches channels. [0003] In the prior art, the method for determining the deflection angle of the face is to first determine the face image, extract the nose tip point and nasal saddle point included in the face from the face image, and then determine the face deflection ba...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the saddle point of the nose refers to the lowest point of the concave saddle valley from the tip of the nose to the center of the brow. It is generally located between the eyes. Generally, the saddle point of the nose is found based on the gray value, and the point with the smallest gray value between the two eyes is determined as the nose. Saddle point, but due to light, women's makeup, people wearing glasses, etc., the gray value between the two eyes will change, and then the determined position coordinates of the nasal saddle point will be inaccurate, which will lead to the calculated face deflection angle Inaccurate

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