| 1. |
- Nyström, Ingela, et al.
(författare)
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2D grey-level convex hull computation: a discrete 3D approach
- 2003
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Konferensbidrag (refereegranskat)abstract
- We compute discrete convex hulls in 2D grey-level images, where we interpret grey-level values as heights in 3D landscapes. For these 3D objects, using a 3D binary method, we compute approximations of their convex hulls. Differently from other grey-level
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| 2. |
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| 3. |
- Sanniti di Baja, Gabriella, et al.
(författare)
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2D grey-level skeleton computation: A discrete 3D approach
- 2004
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Ingår i: Proceedings of International Conference on Pattern Recognition (ICPR 2004).
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Konferensbidrag (refereegranskat)abstract
- A discrete 3D binary approach to compute the skeleton in 2D grey-level images is presented. The 2D grey-level input image is converted to a 3D binary image and the top surface of the foreground is identified. This discrete surface then undergoes skeletonization. The obtained 3D curve skeleton is pruned, before being projected back to a 2D grey-level image. This is suitably post-processed, since the projection may cause spurious loops and thickening. This algorithm can find applications in optical character recognition and document analysis or in other situations where shape analysis by skeletons is desired. An important property of the suggested method is that no hard segmentation into foreground and background is needed prior to the skeletonization.
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| 4. |
- Sanniti di Baja, Gabriella, et al.
(författare)
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A new shape descriptor for surfaces in 3D images
- 2002
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Ingår i: Pattern Recognition Letters. ; 23:6, s. 703-711
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Tidskriftsartikel (refereegranskat)abstract
- We introduce a linear shape descriptor for (open) surfaces in 3D images. To extract the shape descriptor, the border of the surface is first identified. Then, the distance transform of the surface is computed, where each voxel in the surface is labelled w
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| 5. |
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| 6. |
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| 7. |
- Svensson, Stina and Sanniti di Baja, Gabriella
(författare)
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Simplifying curve skeletons in volume images
- 2003
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Ingår i: Computer Vision and Image Understanding. ; 90, s. 242-257
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The curve skeleton of a 3D solid object provides a useful tool for shape
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| 8. |
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| 9. |
- Svensson, Stina, et al.
(författare)
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Curve skeletonization of surface-like objects in 3D images guided by voxel classification
- 2002
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Ingår i: Pattern Recognition Letters. - 0167-8655 .- 1872-7344. ; 23:12, s. 1419-1426
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Tidskriftsartikel (refereegranskat)abstract
- Skeletonization is a way to reduce dimensionality of digital objects. Here, we present an algorithm that computes the curve skeleton of a surface-like object in a 3D image, i.e., an object that in one of the three dimensions is at most two-voxel thick. A
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| 10. |
- Svensson, Stina, et al.
(författare)
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Finding Cavities and Tunnels in 3D Complex Objects
- 2003
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Konferensbidrag (refereegranskat)abstract
- Topological properties are global features that can be useful for recognition of digital objects. For example, this is the case for objects having complex shape without being decomposable into meaningful simple parts. In the case of 3D binary images, top
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| 11. |
- Svensson, Stina, et al.
(författare)
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Using distance transforms to decompose 3D discrete objects
- 2002
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Ingår i: Image and Vision Computing. ; 20:8, s. 529-
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Tidskriftsartikel (refereegranskat)abstract
- Object decomposition into simpler parts greatly diminishes the complexity of a recognition task. In this paper, we present a method to decompose a 3D discrete object into nearly convex or elongated parts. Object decomposition is guided by the distance tra
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| 12. |
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