Large scale maps are available for many countries. The building ground plans of those maps can be helpful for the reconstruction of 3D building models from laser data and aerial images. This paper presents two studies on 3D building reconstruction. The first study combines data of a laser scanner with a high point density with the ground plans. The reconstruction approach is data driven. The se...

The problem addressed here was to obtain optimal and deliverable dynamic multileaf collimator (MLC) leaf sequences from four-dimensional (4D) geometries for dynamic MLC tracking delivery. The envisaged scenario was where respiratory phase and position information of the target was available during treatment, from which the optimal treatment plan could be further adapted in real time. A tool for...

The goal of Geometric Constraint Solving is to find 2D or 3D placements of some geometric primitives fulfilling some geometric constraints. The common guideline is to solve them by a numerical iterative method (e.g. Newton-Raphson method). A sole solution is obtained whereas many exist. But the number of solutions can be exponential and methods should provide solutions close to a sketch drawn b...

The goal of Point Distance Solving Problems is to find 2D or 3D placements of points knowing distances between some pairs of points. The common guideline is to solve them by a numerical iterative method (e.g. Newton-Raphson method). A sole solution is obtained whereas many exist. However the number of solutions can be exponential and methods should provide solutions close to a sketch drawn by t...

BACKGROUND This paper introduces a method to digitally design a virtual model of a tooth preparation of the mandibular first molar, by using the commercial three-dimensional (3D) computer-aided design software packages Geomagic and Imageware, and using the model as an input to automatic tooth preparing system. METHODS The procedure included acquisition of 3D data from dentate casts and digita...

Visual information processing technology is very important in the implementation for sensory substitution of visually impaired persons as well as applications to factory automation. This paper outlines the design of a visual support system that provides 3D visual information using 3D virtual sounds. Three-dimensional information, such as distance map, object recognition, and object tracking req...

The study of the generated defects on manufactured parts shows the difficulty to maintain parts in their positions during the machining process and to estimate them during the pre-process plan. This work presents a contribution to the development of 3D models for the optimization of the manufacturing tolerances. An experimental study allows the measurement of the defects of part positioning for...

Existing gaze estimation methods rely mainly on 3D eye model or 2D eye appearance. While both methods have validated their effectiveness in various fields and applications, they are still limited in practice, such as portable and non-intrusive system and robust eye gaze tracking in different environments. To this end, we investigate on combining eye model with eye appearance to perform gaze est...

In this paper, CMU video-rate stereo machine based on multi-baseline method is introduced. It is a dedicated hardware for very fast range measurement. A calibration method suitable for multi-baseline stereo is also shown. Finally the performance is demonstrated in an indoor scene. Direct motivation of the development of stereo machine is to use it as a range sensor in autonomous navigation vehi...

Careful planning of operations is critical to success of the closed reduction and internal fixation (CRIF) surgery to fix proximal femur fractures. This paper presents a novel surgery planning simulation for the CRIF. The developed simulation employs 3D femur model reconstructed from actual patient’s CT data, and enables the user to make a plan on the model using 2D mouse. A projection scheme i...