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Plane extraction of point cloud data plays an important role in the three-dimensional scene reconstruction, while region growing algorithm which could separate the points with specific attributes is a typical method to deal with this kind of problem. In this paper, methods of plane extraction based on region growing algorithm are studied, and they are divided into four categories according to the...
Depth maps generated by Kinect cameras often contain a significant amount of missing pixels and strong noise, limiting their usability in many computer vision applications. We present a new energy minimization method to fill the missing regions and remove noise in a depth map, by exploiting the strong correlation between color and depth values in local image neighborhoods. To preserve sharp edges...
Spherical harmonics are commonly used in the construction of multi-resolution representations of complex spherical shapes such as brain surface meshes. A key step in generating such representations for a spherical mesh is to construct a one-to-one map onto a sphere. A parametrization inevitably introduces local distortions such as stretching and compression, so that some regions can be severely undersampled...
At present, there are two main types for medical CT image surface reconstruction: one is way of the slice contour, the other is voxel reconstruction, the former method is simple, easy for calculation and much classical computer graphics techniques can be used, the latter is related to complex computing. In this paper, image contours are extracted by active contour model, simplified by DP algorithm...
According to the character of footprint images, a smoothing algorithm based on multi-scale morphological reconstruction for footprint image is proposed in this paper. First of all, a non-idempotent connected operator which can be the criterion for multi-scale filter is defined and an condition to final scale space is decided on the basis of the feature of footprint image. Subsequently, the connected...
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