Tomography-image-based facial skin three-dimensional surface model reconstructing method
A 3D model and 3D surface technology, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as complex calculation process, loss of feature points, and inconsistency
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[0059] Step 1: Use the Marching Cubes algorithm to reconstruct the 3D skin model from the known craniofacial tomographic data; and determine the sequence number of the grid vertices according to the order of the grid vertices obtained during the reconstruction process, and use the .obj file format to store the obtained skin 3D model; the reconstructed 3D model of skin is as image 3 shown, where image 3 (a), image 3 (b), image 3 (c) and image 3 (d) To reconstruct the 3D models of the skin under different viewing angles, image 3 (b) and image 3 (c) It shows that the model contains a large number of impurities that must be removed to establish a three-dimensional surface model of the skin;
[0060] Step 2, transform the 3D skin model obtained in step 1 into the Frankfurt coordinate system:
[0061] (1) Establish the Frankfurt coordinate system:
[0062] (1.1) Mark p on the outer contour line of the midsagittal plane of the three-dimensional skin model 1 , p 2 ,......
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