A method for locating key points in face point cloud based on cylindrical coordinates
A technology of cylindrical coordinates and positioning methods, which is applied in calculation, character and pattern recognition, computer parts and other directions, can solve problems such as low efficiency, no processing, and large amount of calculation for point cloud data processing, and achieve high calculation efficiency and degeneracy good effect
Active Publication Date: 2022-07-15
EAST CHINA UNIV OF TECH
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Problems solved by technology
[0002]The object reconstruction method based on 3D point cloud has the characteristics of high reconstruction accuracy, but the processing of the spatial relationship of point cloud data is computationally intensive and inefficient
At present, most face reconstruction methods based on point clouds use general point cloud processing methods, and do not deal with the characteristics of faces.
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[0074] The present invention will be described in detail below with reference to the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments do not limit the present invention. Equivalent transformations or substitutions all fall within the protection scope of the present invention.
[0075] ginseng figure 1 As shown, this embodiment provides a method for locating key points in a face point cloud based on cylindrical coordinates, including:
[0076] Step S1, based on the shape feature of the human head, convert the disordered Cartesian coordinate point cloud into an ordered gridded cylindrical coordinate point cloud;
[0077] Step S2, taking the radial length as the eigenvalue, and adopting the median filter to degenerate the point cloud;
[0078] Step S3, according to the features of the face organs in the cylindrical coordinates, the positions of the nose, mouth, eyes and eyebrows in the face are respectively located by using t...
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The invention provides a method for locating key points of a face point cloud based on cylindrical coordinates, comprising: step 1, converting a disordered rectangular coordinate point cloud into an ordered gridded cylindrical coordinate point cloud based on a shape feature of a human head; Step 2, take the radial length as the feature value, and use the median filter to degenerate the point cloud; Step 3, according to the characteristics of the face organs in the cylindrical coordinates, use the integral projection curve of the transverse curve and the radius to locate the points in the face respectively. Position of nose, mouth, eyes and eyebrows. The invention is suitable for scanning the point cloud of an erect face, has high calculation efficiency and good degeneracy effect, and lays a foundation for the subsequent fine reconstruction of the face, deformed face, and face organ measurement.
Description
technical field [0001] The invention relates to a method for locating key points of a face point cloud, in particular to a method for locating key points of a face point cloud based on cylindrical coordinates. Background technique [0002] The object reconstruction method based on 3D point cloud has the characteristics of high reconstruction accuracy, but the processing of the spatial relationship of point cloud data requires a large amount of computation and low efficiency. At present, most of the face reconstruction methods based on point cloud adopt the general point cloud processing method, and do not deal with the characteristics of the face. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a method for locating key points of face point cloud based on cylindrical coordinates, which can degenerate the original point cloud relatively quickly, determine the adjacency relationship between points in the point cloud, and locate the point ...
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IPC IPC(8): G06V40/16
CPCG06V40/165
Inventor 陆玲王文莉李丽华王蕾
Owner EAST CHINA UNIV OF TECH