Abstract 3D morphable models (3DMMs) are generative for face shape and appearance. Recent works impose recognition constraints on 3DMM parameters so that the shapes of same person remain consistent. However, traditional 3DMMs satisfy multivariate Gaussian distribution. In contrast, identity embeddings meet hypersphere distribution, this conflict makes it challenging reconstruction to preserve f...

This paper contains some reflections about using 3D topology, and more generally some 3D concepts related to 3D cadastre. Firstly, we develop some conceptual views about 3D modelling and more specifically about the definition of 3D spatial objects. Secondly, we present a new framework for representing spatial relationships. The framework has different “complexity” levels and allows mixing simpl...

The current study both synthesizes and uses four compounds of graphene oxide (GO), nitrogen doped graphene oxide (ND-GO), high nitrogen doped graphene oxide (HND-GO), and three dimensional high nitrogen doped graphene oxide (3D-HND-GO) in order to remove a model anionic dye, Congo red (CR) from wastewaters. It also compares their carbon nano-structure, with regard to removal efficiency and find...

Aggregation of Local Features (ALF) is a wellstudied approach for image as well as 3D model retrieval (3DMR). A carefully designed local 3D geometric feature is able to describe detailed local geometry of 3D model, often with invariance to geometric transformations including 3D rotation of local 3D regions. For efficient 3DMR, these local features are aggregated into a feature per 3D model by u...

We introduce a new approach for tracking-based segmentation of 3D tubular structures. The approach is based on a novel combination of a 3D cylindrical intensity model and particle filter tracking. In comparison to earlier work we utilize a 3D intensity model as the measurement model of the particle filter, thus a more realistic 3D appearance model is used that directly represents the image inte...

Developing a three-dimensional (3D) data model for Geographic Information Systems (GIS) is an essential and complex issue. 3D modelling in GIS is becoming ever more important for the development of cyber cities and digital earth, which have recently become feasible. A competent 3D model forms an efficient foundation for 3D visualization, query and spatial analysis. As a development of the exist...

3D geospatial information has always been a challenge due to a variety of data models, resolutions and details, ways of representation (b-reps, voxel, SCG), etc. After 9/11 the interest in 3D models (buildings or undergrounds) for emergency responses is progressively increasing. Such models are mostly available from the design phase (as CAD models). Design CAD models are in most of the cases to...