Local feature characterization method based on face expression image
A facial expression, local feature technology, applied in image analysis, image data processing, computer parts and other directions, can solve the problems of high time complexity, difficult to determine initial parameters, large amount of calculation and so on
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[0084] In this example, if figure 1 As shown, a local feature representation method based on facial expression images is carried out as follows:
[0085] Step 1, preprocessing the facial expression image;
[0086] Step 1.1, see figure 2 , use the Haier detector to determine the position of the human eye in the facial expression image, and the center position of the left eye is recorded as: E l , the position of the center of the right eye is denoted as: E r ; put E l ,E r The distance between them is recorded as: d;
[0087] Step 1.2, crop the facial expression image, according to the distance of 0.6d upward from the horizontal line where the center of the human eye is located, and the distance of 1.6d downward from the horizontal line where the center of the human eye is located, from the left eye center position E l The distance from the position to the left is 0.4d, from the position E of the center of the right eye r After cropping at a distance of 0.4d to the righ...
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