Method and device for creating eye template as well as method and device for detecting eye state
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An eye state and eye technology, applied in the field of creating eye templates and detecting eye state, can solve the problem of low accuracy of eye state detection
Inactive Publication Date: 2015-02-11
SPREADTRUM COMM (TIANJIN) INC
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[0006] The problem that the present invention solves is the
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Embodiment 1
[0100] image 3 is a schematic flow chart of the method for creating an eye template provided by this embodiment, such as image 3 As shown, when creating the eye template, step S301 is first performed to extract the face image of the current frame.
[0101] The face image of the current frame is acquired by using the face detection method in the prior art.
[0102] Step S302, determining the eye region of the face image of the current frame through simple region division.
[0103] In this embodiment, the face image of the current frame is described as a square image, and the simple area division can be assuming that the side length of the face area is 1 (the unit is the length unit), please refer to Figure 4 ,Such as Figure 4 As shown, assume that the coordinate origin (0,0) is the upper left corner of the face area, starting from the origin, the horizontal direction to the right is the X direction, and starting from the origin, the vertical downward direction is the Y d...
Embodiment 2
[0148] This embodiment is a specific embodiment given based on the technical solution of the above-mentioned method for detecting the state of the eyes. In this embodiment, by judging whether the left eye and the right eye are blinking respectively, it is detected whether the eye state is in the eye-opening state or the eye-blinking state .
[0149] Such as Figure 7 As shown, step S701 is firstly executed to create a left-eye template and a right-eye template respectively.
[0150] The method for creating an eye template provided by the present invention can be used to create a left-eye template and a right-eye template respectively, which will not be repeated here.
[0151] Step S702 is executed to determine whether the face detection is successful.
[0152] After creating the eye template, when starting to detect the eye state, you need to perform face detection first to obtain the eye area to be detected. In this step, if it is judged that the face detection fails, creat...
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Abstract
The invention provides a method and a device for creating an eye template as well as a method and a device for detecting an eye state. The method for creating the eye template comprises the following steps: extracting an eye region in a facial image; obtaining a radially symmetrical transformation result of each pixel in the eye region by a fast radially symmetrical transformation algorithm; determining the position of the pixel with a maximal value of the radially symmetrical transformation result as a pupil position; selecting a region containing the pupil position in the facial image in which the pupil position is positioned as the eye template. The method for creating the eye template is capable of accurately positioning the pupil position, so that the created eye template is accurate and reliable. The method for detecting the eye state comprises the following steps: obtaining the eye template by use of the method for creating the eye template; searching a to-be-detected region; determining the region matched with the eye template as a to-be-detected eye region; determining the eye state based on the similarity degree of the eye template and the to-be-detected eye region. The method for detecting the eye state is capable of effectively improving the eye state detection accuracy and has better robustness for spectacles, head shaking, illumination condition transformation and the like.
Description
technical field [0001] The invention relates to the technical field of human eye detection, in particular to a method and device for creating eye templates and detecting eye states. Background technique [0002] The eye is the most important feature of the human face, and it plays an extremely important role in the research and application of computer vision. The detection of the state of the eye has always been a direction that has attracted extensive attention of researchers. On the basis of face recognition, eye state detection helps various smart devices to identify the state of human eyes, and has broad application prospects in the fields of fatigue detection and visual interaction. For example, the physical reaction of the driver's eyes is detected through image processing, and the driver's fatigue detection can be effectively realized through the detection and tracking of the eyes. With appropriate warnings, the incidence of accidents is reduced. For another example...
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