Method for locating central points of eyes in natural lighting front face image

Abstract

The invention discloses a method for locating central points of eyes in a natural lighting front face image. The method comprises the steps that an automatic face detecting algorithm is used for detecting a face area of the input front face image; an active appearance model is used for automatically locating key points on the face in a rectangular frame of the face area to define primary areas of the eye areas; on the basis that the eye areas are primarily located, an eye local appearance model is applied to further defining eye locating areas; light treatment is performed on the eye locating areas which are further defined, so that lighting influence on the local eye areas is eliminated, a boundary operator is applied to detecting the boundary characters, and inner and outer eye corner points are accurately located by using the boundary characters; the connection line of the inner and outer eye corner points of each eye area serves as a calculation starting point, the largest corresponding point is calculated by adopting the method that the circle integral is used for solving the gradient, and the point is the central point of the corresponding eye. The method can be used for accurately locating the eyes, thereby having definite robustness on lighting and eyelid shielding.

Description

Technical field [0001] The invention relates to the field of image processing and pattern recognition, in particular to a method for locating the eye center point in a face image based on natural illumination. Background technique [0002] The detection and positioning of the eye center point in the image or camera video has important application value in the fields of computer vision, human-computer interaction, security monitoring, games and entertainment. In applications based on natural human-computer interaction, you can drive the interaction interface-related operations according to the movement of the center point of the human eye in the video, such as moving the mouse pointer, selecting different buttons, or driving one with the movement of the eyes in an expression interactive game The facial expression of the virtual character changes. It has a wide range of application value in helping the disabled interaction and interactive entertainment. [0003] Under natural light...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the deficiencies of the above-mentioned prior art, taking into account practical problems such as occlusion of the eye area, uneven illumination, less pixels in the eye area, etc. Automatically perform light equalization processing and edge calculation in the face image to reduce the influence of partial occlusion, and realize the positioning of the center of the eye under the condition that there are few pixels in the iris area of ​​the eye and the iris area is occluded by the upper eyelid

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