Method for detecting distance between human face and camera based on image acquisition

Abstract

The invention provides a method for detecting a distance between a human face and a camera based on image acquisition. The method includes acquiring a normal face image of a primitive human face positioned at a preset first axial distance and a preset second axial distance through a monocular camera, acquiring a first average pixel value and a second average pixel value corresponding to an human eye pupil distance in the normal face image, calculating an original mapping relationship between the human eye pupil distance and the human face distance according to the preset first axial distance,the preset second axial distance, the first average pixel value and the second average pixel value, acquiring the human face image to be detected by the monocular camera, and carrying out image processing on the human face image to obtain the eye pupil distance to be detected; and calculating the distance of the human face to be detected according to the original mapping relationship and the humaneye pupil distance to be detected. According to the method for detecting the distance between the human face and the camera based on image acquisition, the original mapping relationship between the human eye pupil distance and the human face distance is obtained, the distance between the human face to be detected is obtained according to the eye pupil distance to be detected and the original mapping relationship, and a distance measuring sensor is not needed in the whole process.

Description

technical field [0001] The invention relates to the field of face ranging, in particular to a method and system for detecting the distance between a face and a camera based on image collection. Background technique [0002] Most of the traditional face ranging methods are based on some distance sensors to obtain a distance from the face to the device, such as TOF, 3D structured light, laser ranging, etc. However, the traditional face ranging method must rely on the ranging sensor when measuring the face ranging of the monocular camera, which makes the ranging process have certain limitations, and the cost of the traditional face ranging is relatively high. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, one of the purposes of the present invention is to provide a method for detecting the distance between a face and a camera based on image acquisition, which can solve the problem that the traditional monocular camera must rely on t...

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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, one of the purposes of the present invention is to provide a method for detecting the distance between a face and a camera based on image acquisition, which can solve the problem that the traditional monocular camera must rely on the distance sensor when measuring the face range. Limitation problem

[0004] The second object of the present invention is to provide a system for detecting the distance between the face and the camera based on image acquisition, which can solve the problem that the traditional monocular camera must rely on the limitation of the distance sensor when measuring the distance of the face

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