Generating an Indoor space routing graph using semantic-geometric method

designing and implementing a 3D indoor navigation web application

​During the recent years, the need arises for indoor navigation systems for guidance of a client in natural hazards and fire, due to the fact that human settlements have been complicating. This research paper aims to design and implement a visual indoor navigation web application. The designed system processes CityGML data model automatically and then, extracts semantic, topologic and geometric...

SEIMCHA: a new semantic image CAPTCHA using geometric transformations

As protection of web applications are getting more and more important every day, CAPTCHAs are facing booming attention both by users and designers. Nowadays, it is well accepted that using visual concepts enhance security and usability of CAPTCHAs. There exist few major different ideas for designing image CAPTCHAs. Some methods apply a set of modifications such as rotations to the original imag...

Indoor Semantic Modelling for Routing: The Two-Level Routing Approach for Indoor Navigation

Generating Geometric Graphs Using Automorphisms

We outline an algorithm for generating nets, a “net” being a geometric graph embedded in a space on which some group acts transitively. We prove that any connected net in such a space can be generated by this process, which can also be regarded as a covering of the net by copies of a connected “transversal” subnet. This paper outlines some of the underlying theory supporting a crystal predictio...

Generating Sentences from Semantic Vector Space Representations

The first work of this kind in a monolingual setting successfully generates two and threeword phrases with predetermined syntactic structures by decoupling the task into three phases: synthesis, decomposition, and search [4]. During the synthesis phase, a vector is constructed from some input text. This vector is decomposed into multiple output vectors that are then matched to words in the voca...

A 2D geometric constraint solver using a graph reduction method

Keywords: Geometric constraints Modeling by constraints Graph-constructive solver Decomposition–recombination (DR) planning Graph algorithms Under-constrained problems a b s t r a c t Modeling by constraints enables users to describe shapes by specifying relationships between geometric elements. These relationships are called constraints. A constraint solver derives then automatically the desig...