Projection is the process of forming a 2D image from a 3D scene. Perspective projection is formed by rays reflected from the objects through the optical center (or focal center) onto a capturing device (CCD or film). To avoid reversal of the image we usually assume that the capturing device lies in front of the optical center. We form a coordinate system by setting the origin O = (0, 0, 0) at t...

Professional paper Photogrammetry is a technique of measuring 3D coordinates using photography as the main medium of metrology. This paper describes the use of the photogrammetric system in the automotive industry for control and measuring tasks. This contactless method is suitable for industrial application, because the measuring instruments are robust and mobile, so precise measurements are p...

This study aimed to develop a novel 3D parallel mechanism robot driven by three vertical-axial pneumatic actuators with a stereo vision system for path tracking control. The mechanical system and the control system are the primary novel parts for developing a 3D parallel mechanism robot. In the mechanical system, a 3D parallel mechanism robot contains three serial chains, a fixed base, a movabl...

The layout of measurement points is the key to efficient inspection free-form surfaces. Two algorithms are proposed for surface points: Gaussian curvature variation grid method and isoparametric line method. former first divides into a uniform grid, determines number each based on change in selects within distribution curvature. latter achieved by taking from initial U- V -direction lines, gene...