Vision based inspection systems for 3D measurements using single camera, are extensively used in several industries, today. Due to transportation and/or servicing of these systems, the camera in this system is prone to mis-alignment from its original position. In such situations, although a high quality calibration exists, the accuracy of 3D measurement is a↵ected. In this paper, we propose a s...

This paper presents a method for determining the six degrees-of-freedom transformation between a camera and a base frame of interest. A planar mirror is maneuvered so as to allow the camera to observe the environment from several viewing angles. Points, whose coordinates in the base frame are known, are observed by the camera via their reflections in the mirror. Exploiting these measurements, w...

Camera control in real-time interactive 3D applications is a challenging problem. Developing a generalized system able to produce high quality visual results and smooth camera movements in dynamic environments remains an open problem in the research community. In this paper, we describe the implementation and evaluation of Artificial Potential Fields for automatic camera placement. We first des...

This work regards fingertip contact detection and localization upon planar surfaces to provide interactivity in augmented displays implemented upon these surfaces, by projector-camera systems. In contrast to the widely employed approach where user hands are observed from above, lateral camera placement avails increased sensitivity to touch detection. An algorithmic approach for the treatment of...

We present an automatic camera and mirrors placement method for visualizing 3D scenes such that complete and nonredundant visibility is guaranteed, as well as highest image resolution. We provide algorithms and geometries for optimal object-independent mirrors and viewpoint placement for all objects in a specific class. We also briefly consider object-dependent algorithmic problems, where mirro...

This paper considers, the determination of internal camera parameters from two views of a point set in three dimensions. A non-iterative algorithm is given for determining the focal lengths of the two cameras, as well as their relative placement, assuming all other internal camera parameters to be known. It is shown that this is all the information that may be deduced from a set of image corres...

Simulation is an important aspect to consider when designing an inspection system based upon machine vision. The tire inspection system uses thermal cameras to inspect the surface of a tire. The simulation of a tire inspection system can yield an optimal set of parameters for a thermal camera, or given a specific thermal camera provide information on the optimal placement of the camera. Since t...

We propose a novel iterative method for optimally placing and orienting multiple cameras in 3D scene. Sample applications include improving the accuracy of reconstruction, maximizing covered area surveillance, or coverage multi-viewpoint pedestrian tracking. Our algorithm is based on block-coordinate ascent combined with surrogate function an exclusion technique. This allows to flexibly handle ...