Stećci are medieval tombstones that can be found in situ the landscapes of Western Balkans. Only approx. 8% stećci have various decorations form low relief, while less than 400 also bear inscriptions. Climate influences often cause erosion these engravings, which makes them increasingly difficult to detect and identify. As part archaeological research on phenomenon area župa Dabar (modern munic...

We define a natural class of graphs by generalizing prior notions of visibility, allowing the representing regions and sightlines to be arbitrary. We consider mainly the case of compact connected representing regions, proving two results giving necessary properties of visibility graphs, and giving some examples of classes of graphs that can be so represented. Finally, we give some applications ...

A new technique is presented for determining the positions where a range sensor should be located to acquire the surfaces of a complex scene. The algorithm consists of two stages. The first stage applies a voting scheme that considers occlusion edges. Most of the surfaces of the scene are recovered through views computed in that way. Then, the second stage fills up remaining holes through a sch...

iran with 2500 years ancient culture has been the witness of many changes during the history.the natural context of these habitats has been the victim of some changes during the years, which have roots in people beliefs in each period. but the point which we understand by studding the context of different cultures in iran is, despite the changes in dominions and religions along the history iran...

The combinatorial complexity of the region lit up from a point light source inside a simple n-gon with perfectly reeecting edges, after at most k specular reeections was established as O(n 2k) 2]. A lower bound of ((n=k) 2k) was also established, matching the upper bound for any xed k. In a real situation, surfaces may not be perfect mirrors; indeed most surfaces may be non-shiny or rough, caus...

We study the problem of visibility in polyhedral terrains in the presence of multiple viewpoints. We consider three fundamental visibility structures: the visibility map, the colored visibility map, and the Voronoi visibility map. We study the complexity of each structure for both 1.5D and 2.5D terrains, and provide efficient algorithms to construct them. Our algorithm for the visibility map in...