This report introduces some simplifications to the method by Fitzgibbon et al. [1] that allows for 3D model construction from turn-table sequences. It is assumed that the reader has previously read [1] in order to fully understand this report. Fitzgibbon et al. presents a method for 3D model construction that utilizes the extra constraints imposed by turn-table sequences. Restricting the scenar...

We describe an automated scene modeling system that consists of two components operating in an interleaved fashion: an incremental modeler that builds solid models from range imagery, and a sensor planner that analyzes the resulting model and computes the next sensor position. This planning component is target-driven and computes sensor positions using model information about the imaged surface...

Motivation: The time-varying imagery captured by a video camera contains a wealth of raw information about the three-dimensional dynamics and structure of the world. Once the camera motion is determined and compensated for, the remaining scene motion may be used to build a global representation of this temporal data. Such tasks as activity detection, 2D mosaic construction, and 3D site modeling...

Spatial modeling is one of the most important parts in the area of spatial relations, and it is necessary to develop a new model with high practicality. Firstly this paper analyzes the characteristics and defects of present models; secondly introduces in detail the construction method of quadtree histogram; thirdly cloud model are used to judge spatial directional relation. The experimental res...

In this paper, we have adopted a novel method for 3D-shape reconstruction. We derived a volumetric data which is constructed from a stack of cross-section imagesthe so-called tomographic image. Each of the cross-section images is computed from a series of photographs taken at a number of angles around the object. A corresponding intensity profile (row) on each digitized photograph resembles a p...

[1] This study presents a systematic and quantitative analysis of the effect of inhomogeneous surface albedo on shortwave cloud absorption estimates. We used 3D radiative transfer modeling over a checkerboard surface albedo to calculate cloud absorption. We have found that accounting for surface heterogeneity enhances cloud absorption. However, the enhancement is not sufficient to explain the r...

We propose and describe a novel video capturing system called Sat-Cam that can observe and record the users’ activity from effective viewpoints to negate the effects of unsteady mobile video cameras or switching between a large number of video cameras in a given environment. By using real-time imagery from multiple cameras, our system generates virtual views fixed in relation to the object. The...

Several reports from the EU and from the French Ministry of Education (Real Jantzen, 2001; Blandin, 2002; Hamelin, 2003) detect a gap between the teaching of sciences and scientific research: they recommend the involvement of professional researchers in the classroom. But all these reports recognize that the procedures for enacting such a cooperation are still to be constructed. Thus, collectiv...

This article deals with video sequence compression for very low bitrate. We assume static scene captured with a monocular moving camera. We propose a method using several 3D models in order to reconstruct the original video sequence or a virtual one. A complete scheme for video sequence compression is presented and compared with classical compression schemes.

This work introduces a procedure for automatic 3D modeling and discusses its performance in the context of a medical application, namely the 3D modeling of palate’s casts. The general interest of the proposed method lays in the fact that a widespread use of 3D modeling in non-engineering applications requires automatic procedures. The specific interest is in the intriguing mixture of open issue...