Face correction method and device, mobile terminal and computer readable storage medium

Abstract

The invention discloses a face correction method and device, a mobile terminal and a computer readable storage medium, and belongs to the field of mobile terminals. The method comprises the steps thatacquiring face key point information from a face key point detection stage, and acquiring a mapping transformation matrix map; Carrying out map transformation on the coordinates of the image to be corrected through the mapping transformation matrix to generate coordinates Warp corresponding to the new face image; According to the mapping transformation matrix map, re-determining a new key point position landmark _ new and a new face frame bbox _ new; And correcting the new face image according to the new face frame bbox _ new to obtain a corrected face image. According to the embodiment of the invention, the method comprises the following steps: obtaining the data;, information of relative positions between five sense organs of a human face can be reserved; Compared with the prior art, the method has the advantages that while the separability between different faces is improved, five sense organs of the same face can be well reserved at the same positions, the faces participating in verification and the key positions of the registered faces are kept at the same positions, so that the recognition of the same face is simpler, and the user experience is improved.

Description

technical field [0001] The present invention relates to the field of mobile terminals, in particular to a face correction method and device, a mobile terminal and a computer-readable storage medium. Background technique [0002] At present, with the increasing popularity of mobile terminals, more and more users use mobile terminals, and users use mobile terminals more and more frequently in daily life, so that mobile terminals have become one of the indispensable mobile devices for users. [0003] The unlocking of mobile terminals has experienced unlocking related technologies such as slide unlocking, password unlocking, gesture unlocking, and fingerprint unlocking. At present, a new unlocking technology has also been developed, which is face unlocking, which uses the mobile terminal camera to obtain the user's face image , compared with the face-related features entered in advance of the user, so as to achieve the purpose of unlocking the mobile terminal. [0004] Face unl...

AI Technical Summary

Problems solved by technology

[0005] (1) The bbox correction method, according to the bbox provided by the face detection, rotates the face and scales it to the same uniform size (for example, scaling the face to a square), which will cause the relative position information of the facial features to change. , for example, making a person with a long face into a class with a square face, which can easily lead to misidentification

[0006] (2) The bbox correction method of (1) above will make face correction not helpful for face unlocking in some cases

like image 3 Face images (a) and (b), the facial features of the same person have been staggered after correction, which will cause face unlocking failure, especially in low light conditions, the shortcomings of the above method are very obvious

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