Face detection method and device

Abstract

The embodiment of the invention discloses a face detection method and device. The method comprises the following steps: carrying out edge detection processing on a preprocessed image obtained by preprocessing; obtaining an edge detection area and the length value, the width value and the length-width ratio of the edge detection area; according to the length value, the width value and the length-width ratio, obtaining a round area to be detected; carrying out expanded processing on the complexion area to the preprocessed image within the coverage range of the round area to be detected, and obtaining a first face contour; carrying out light compensation processing and complexion detection on the first light compensation image within the coverage range of the round area to be detected to obtain a second face contour; and combining a first face contour with a second face contour to obtain the face image. The device comprises a contour detection module, a complexion area expansion module, a light compensation and complexion detection module and a combination module. The embodiment of the invention avoids the phenomenon that face data is lost because of shadow caused by shading in the complexion detection process, and the accuracy rate and the detection speed of face detection can be improved.

Description

Technical field [0001] The embodiments of the present invention relate to the field of image processing, and in particular to a method and device for face detection. Background technique [0002] Face Detection (Face Detection) refers to determining the position and size of all existing faces in an image. The face detection device takes an image that may include human faces as input, and outputs a parameterized description about whether there are human faces in the image, and the number, position, scale, and posture of the human faces. [0003] As the first step of an automatic face recognition system, face detection technology plays a very important role. It provides specific information about the face to be recognized for subsequent face classification, which is directly related to the effect of subsequent processing. In the human-computer interaction system, face detection is a technology that enables the computer to perceive whether a person exists or not. The proposal of face...

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Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: the shadow caused by the occlusion of hats or other things will cause the loss of face data in the process of detecting skin color, so that the existing face detection method The detection accuracy rate is not high; at the same time, the method based on the face model and the method based on statistics need to train a large number of images, resulting in a decrease in the detection rate

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