1. 3D data representation
While images are classically represented as 2D matrices (possibly with vector values, as for color), various representations exist for 3D data: three-dimensional matrix, depth map, point cloud or mesh. Readers interested in point clouds may wish to refer to the article by Marcotegui and Serna
The three-dimensional matrix is a direct extension of the classic 2D image representation. Like a pixel, a voxel is an elementary volume in 3D space that contains certain information. The voxel grid is used for 3D images...
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3D data representation
Fundamentals of deep learning for image analysis
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