Branch-Pipe: Improving Graph Skeletonization around Branch Points in 3D Point Clouds

Automatic registration of overlapping 3D point clouds using closest points

While the SoftAssign algorithm imposes a two-way constraint embedded into the deterministic annealing scheme and the EMICP algorithm imposes a one-way constraint, they represent the state of the art technique for the automatic registration of overlapping free form shapes. They both have a time complexity of O(n). While the former has a space complexity also of O(n), the latter has a space compl...

At a New Branch Point

BRCA1 at a branch point.

T breastand ovarian-specific tumor suppressor protein, BRCA1, has been implicated in regulating the nuclear processes of repair of damaged DNA, chromatin remodeling, and transcription. Although many have sought specific DNA sequences bound by BRCA1, no such sequences have been reported. In new research described in this issue of PNAS (1), BRCA1 protein is shown to bind to DNA with high affinity...

Graph Based Over-Segmentation Methods for 3D Point Clouds

Over-segmentation, or super-pixel generation, is a common preliminary stage for many computer vision applications. New acquisition technologies enable the capturing of 3D point clouds that contain color and geometrical information. This 3D information introduces a new conceptual change that can be utilized to improve the results of over-segmentation, which uses mainly color information, and to ...

Sub-au imaging of water vapour clouds around four Asymptotic Giant Branch stars

We present MERLIN maps of the 22-GHz H2O masers around four low-mass latetype stars (IK Tau U Ori, RT Vir and U Her), made with an angular resolution of ∼15 milliarcsec and a velocity resolution of 0.1 km s. The H2O masers are found in thick expanding shells with inner radii ∼6 to 16 au and outer radii four times larger. The expansion velocity increases radially through the H2O maser regions, w...