Acquiring geometric data, such as coordinates, displacements or deformations, has always been a way to verify mathematical modelling in civil engineering. The introduction of finite elements methods further reinforced this trend. This paper reports on two applications of photogrammetry to soil and rock mechanics in order to provide an accurate and dense description of the deformation fields of ...

This paper discusses the evolution of algorithms and procedures for network orientation that have accompanied the transition of close-range photogrammetry from a film-based to a digital image-based measurement process suited to partial or full automation. A brief mathematical background to orientation models derived via perspective projection and projective geometry is first presented, and the ...

A convenient 3D measurement using amateur digital camera is enormously expected from various fields according to appearance of the high resolution amateur cameras since pixel numbers of amateur digital cameras are amazingly increasing by modern semiconductor and digital technology. In these circumstances, software for low-cost digital photogrammery “3DiVision” was designed to perform convenient...

In the photogrammetry field, interest in region detectors, which are widely used in Computer Vision, is quickly increasing due to the availability of new techniques. Images acquired by Mobile Mapping Technology, Oblique Photogrammetric Cameras or Unmanned Aerial Vehicles do not observe normal acquisition conditions. Feature extraction and matching techniques, which are traditionally used in pho...

The paper describes a new approach for the generation of architectural orthoimages using digital surface models, based on a CAD model of the object. The model is supposed to consist of surface elements, plane or curved. All surface elements of the CAD model are orthogonally projected onto the reference plane. For each grid element the elevation above or below the reference plane are calculated ...

The ongoing development of advanced techniques in photogrammetry, computer vision (CV), robotics and laser scanning to efficiently acquire three dimensional geometric data offer new possibilities for many applications. The output of these techniques in the digital form is often a sparse or dense point cloud describing the 3D shape of an object. Viewing these point clouds in a computerized digit...

For realistic virtual model generation two main problems have to be solved: to achieve the required geometric accuracy in object description and to obtain the highest reachable texture similarity. Recently digital close-range photogrammetry offers precise and flexible means for the first problem solution accurate geometric 3D reconstruction. Besides images acquired for 3D reconstruction can be ...

Image Aliasing is a problem appearing as artifacts in digitally resampled images, which degrades the quality of the image. In digital rectification and texture mapping pixels from an input image are transformed to pixels of an output image. Discrete nature of a digital image causes Aliasing in transformed image. In this paper source of aliasing and theory of antialiasing is described. The neces...