We demonstrate image processing algorithms that achieve the distortion-corrected projection on surfaces with horizontal discontinuity, with casually placed camera and projector. We focus on three cases of perspective-corrected projection: single projection on flat surface, single projection on wall corner, multiple projections on flat surface. Image pre-warping is used to achieve screen geometr...

This paper discusses the evolution of algorithms and procedures for network orientation that have accompanied the transition of close-range photogrammetry from a film-based to a digital image-based measurement process suited to partial or full automation. A brief mathematical background to orientation models derived via perspective projection and projective geometry is first presented, and the ...

We investigate the motions that lead to ambiguous Euclidean scene reconstructions under several common calibration constraints, giving a complete description of such critical motions for: (i) internally calibrated orthographic and perspective cameras; (ii) in two images, for cameras with unknown focal lengths, either different or equal. One aim of the work was to evaluate the potential of moder...

We study almost Hermitian structures admitting a Hermitian connexion with totally skew-symmetric torsion or equivalently, those almost Hermitian structures with totally skewsymmetric Nijenhuis tensor. We investigate up to what extent the Nijenhuis tensor fails to be parallel with respect to the characteristic connexion. This is naturally described by means of an extension of the notion of Killi...

Starting from an ontology draft which reflects the intended modeling perspective, the ontology engineer can be supported by suggesting similar already existing sub-ontologies and ways for integrating them with the existing draft ontology. Our approach combines syntactic, linguistic, structural and logical methods into an innovative modelingperspective aware solution for detecting matchings betw...

To address complexity of modeling the world’s processes, over the years in different scientific disciplines separation assumptions have been made to isolate parts of processes, and in some disciplines they have turned out quite useful. It can be questioned whether such assumptions are adequate to address complexity of integrated human mental and social processes and their interactions. In this ...

Collaborative networked organizations are complex entities whose proper understanding, design, implementation, and management require the integration of different modeling perspectives. A comprehensive modeling framework is therefore proposed as a first step towards the elaboration of a reference model for collaborative networks. Modeling tools and theories developed in other disciplines are al...

This paper reports an observation of communication in collaborative design by examining several historical cases of building design projects. It will present three cases of teamwork in architectural modelling. Each case provides a collection of drawings or illustrations that depict the artefacts being designed and constructed. Looking at the cases from the design as modelling perspective, two i...

In this paper, we examine the demand for fresh water of China in 2025 from the complex system modeling perspective and we develop an efficient, economical and practical water strategy to meet the demand for fresh water in 2025.Different from previous research, this study focus on studying several factors that can influence the demand for fresh water, and their interplay within the complex large...

The "perspective-plane" problem proposed in this paper is similar to the "perspective-n-point (PnP)" or "perspective-n-line (PnL)" problems, yet with broader applications and potentials, since planar scenes are more widely available than control points or lines in practice. We address this problem in the Bayesian framework and propose the "Bayesian perspective-plane (BPP)" algorithm, which can ...