In this paper, detection of pedestrian groups and counting of the number of pedestrians in each group using “subtraction stereo” are discussed. Subtraction stereo is a stereo vision method that focuses on the movement of objects to make a stereo camera robust and produces range images for moving regions. Pedestrian groups are detected with a standard labeling, and three dimensional (3D) feature...

Abstract Multi-view stereo remains a popular choice when recovering 3D geometry, despite performance varying dramatically according to the scene content. Moreover, typical pinhole camera assumptions fail in presence of shallow depth field inherent macro-scale scenes; limiting application larger scenes with diffuse reflectance. However, defocus blur can itself be considered useful reconstruction...

The paper presents an approach to reactive navigation in cross-country terrains. The approach relies on a particular probabilistic obstacle detection procedure, that describes the area perceived by a pair of stereo cameras as a set of polygonal cells. To generate the motion commands on the basis of this terrain description, we present some improvements and adaptations to the classical potential...

After describing the principles of the "in pool" and "dry" installations, techniques used in neutron radiography are reviewed. Use of converter foils with silver halide films for the direct and transfer methods is described. Advantages of the use of nitrocellulose film for radiographying radioactive objacts are discussed. Dynamic imaging is shortly reviewed. Standardization in the field of neut...

Only a few problems in computer vision have been investigated more vigorously than stereo. Consequently, more than 200 different stereo vision methods have been published and their number is increasing month by month. Although the principle of computational stereo has been known for more than 20 years, new directions in stereo research are still being under development. The objective of this re...

By using mirror reflections of a scene, stereo images can be captured with a single camera. Single camera stereo provides both geometric and radiometric advantages over traditional two camera stereo. In this paper, we discuss these advantages and show that the epipolar geometry is restricted to the class of planar motions. In addition we have implemented a real-time system which demonstrates th...