Motion-based three-dimensional model spatial segmentation method
A 3D model and airspace segmentation technology, applied in the multimedia field, can solve problems such as large storage space and transmission resources, data volume hindering the development and application of grid animation, grid animation complexity and large data volume, etc., and achieve strong theoretical support Effect
Inactive Publication Date: 2016-10-12
ZHEJIANG GONGSHANG UNIVERSITY
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[0003] However, with the widespread application of computer 3D grid animation and virtual reality technology, people have higher and higher requirements for the authenticity of 3D models and 3D scenes, resulting in an increasing complexity and data volume of corresponding grid animation. More and more storage space and transmission resources are consumed
Under the existing network bandwidth conditions, the storage and transmission of too large amount of data will seriously hinder the development and application of grid animation
To solve this problem, it is unrealistic to rely solely on improving processor capabilities and increasing storage capacity and other hardware aspects. Corresponding methods must be adopted to eliminate redundant data between grid animations and improve transmission efficiency.
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[0014] The method steps of the present invention are further described below:
[0015] The present invention comprises the following steps:
[0016] Step 1: Suppose the number of frames is F, and the number of vertices contained in each frame is N, where F>0, N>0. Connect the coordinates of the vertices whose curvature and circumvention are to be calculated in all frames into a curve, and the curvature and circumvention in a certain frame are the curvature and circumvention of the corresponding point on the curve. Save the curvature and winding rate into the matrix k and τ respectively, where both k and τ are N×F matrices, and k ij Indicates the curvature of the i-th vertex in the j-th frame, and the same τ ij Indicates the winding rate of the i-th vertex in the j-th frame, i=1,...,N, j=1,...,F.
[0017] Step 2: Since the coordinates of each vertex in all frames are connected into a curve in Step 1, N space curves are obtained. If two of the curves are very similar, that i...
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The invention discloses a motion-based three-dimensional model spatial segmentation method. According to the method, a model is segmented according to a motion of the model, and the shape of a curve is completely determined according to a theorem in differential geometry: the curvature and winding rate of the spatial curve, so that the motion of the model is measured by adopting the curvature and the winding rate, namely, if the curvatures and winding rates of two vertexes at each frame are similar, it is indicated that motion tracks of the vertexes are very similar and the vertexes are supposed to be clustered in one category. The method has the advantages that the differential geometry and the spatial segmentation are perfectly combined, and the motion of the model is represented by adopting the curvature and the winding rate, so that strong theoretical support can be achieved and points with similar motions can be accurately clustered together.
Description
technical field [0001] The invention belongs to the multimedia technical field of three-dimensional animation model compression, and in particular relates to a model movement-based airspace segmentation method. Background technique [0002] As one of the most active disciplines today, computer graphics mainly includes advanced technologies such as virtual reality, 3D animation, scientific computing visualization, realistic graphics, and CAD. After years of development, computer graphics has been widely used in many fields, among which 3D animation technology plays its unique advantages in many fields such as art, science, product design and display, flight simulation and military simulation. [0003] However, with the widespread application of computer 3D grid animation and virtual reality technology, people have higher and higher requirements for the authenticity of 3D models and 3D scenes, resulting in an increasing complexity and data volume of corresponding grid animatio...
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IPC IPC(8): G06T7/20G06K9/62
CPCG06T2207/10021G06F18/23
Inventor 杨柏林张露红江照意金剑秋
Owner ZHEJIANG GONGSHANG UNIVERSITY