The task of camera calibration is to estimate the intrinsic and extrinsic parameters of a camera model. Though there are some restricted techniques to infer the 3-D information about the scene from uncalibrated cameras, effective camera calibration procedures will open up the possibility of using a wide range of existing algorithms for 3-D reconstruction and recognition. The applications of cam...

In digital close-range photogrammetry, commonly referred to as vision metrology, circular targets are often used for high precision applications. The most common target type used consists of retro-reflective material, which provides a high contrast image with flash photography. The measurement of image coordinates of signalised targets continues to be a factor limiting the achievable accuracy o...

Photogrammetrists have generally made use of wide or super wide angle rectilinear lenses that are designed to reproduce straight lines in the object space as straight lines in the image space. This paper investigates the use of fish-eye optics as an alternative to the conventional super wide-angle lens for vision metrology. The fish-eye design, whilst still retro-focus in construction, rejects ...

In this project, we develop an android app that uses computer vision techniques to estimate an object dimension present in field of view. The app while having compact size, is accurate upto +/5 mm and robust towards touch inputs. We use single-view metrology to compute accurate measurement. Unlike previous approaches, our technique does not rely on line detection and can be generalize to any ob...

This paper describes initial work carried out to advance the use of vision metrology and three dimensional visualization techniques in structural testing and monitoring. A description is given of a methodology for semi-automatically generating dynamic three dimensional computer graphics models, which is employed to provide a three dimensional spatial framework for conventional engineering instr...

Invited Talks (Alphabetical order) Gerardo Adesso (University of Nottingham, UK) Relativistic Quantum Metrology

This paper discusses monitoring of slope deformations by vision metrology with a CCD camera. Reflective targets are placed over a slope, and their object coordinates is measured by a photogrammetric technique. Precision and sensitivity of slope deformation measurement using vision metrology are investigated. Deformation of targets placed on a slope was detected by measurement at two time epochs...

nowadays, the subject of vision metrology network design is local enhancement of the existing network. in the other words, it has changed from first to third order design concept. to improve the network, locally, some new camera stations should be added to the network in drawback areas. the accuracy of weak points is enhanced by the new images, if the related vision constraints are satisfied si...

Lasers and laser diodes are widely used as illumination sources for optical imaging techniques. Time-of-flight (ToF) cameras with laser diodes and range imaging based on optical interferometry systems using lasers are among these techniques, with various applications in fields such as metrology and machine vision. ToF cameras can have imaging ranges of several meters, but offer only centimeter-...

Industrial 3D measurement systems have been in a rapid development phase during the last ten years. The rapid change has been generated primarily by demands for accuracy and efficiency from the aerospace and manufacturing industries, along with very strong competition amongst commercial providers of systems and services. The current trends are toward total automation of the measurement set up a...