In full-field 3D displacement measurement, stereo digital image correlation (Stereo-DIC) has strong capabilities. However, as a result of difficulties with camera calibration and surface merging, 360-deg panoramic measurements remain challenge. This paper proposes field measurement method in order to accurately measure the shape complex shaped objects natural textures. The proposed is based on ...

The classical earth pressure theory assumes a semi-infinite soil behind the wall, which is no longer applicable to problem of in case finite soil. A field study was conducted investigate at different excavation depths. cells were used measure change along depth, and measured pressures compared with calculation results for Moreover, influence width-to-depth ratio, cohesion, internal friction ang...

One important problem within the WITAS [1] project is detection of moving objects in aerial images. This paper presents an original method to estimate the displacement between two frames, based on multiscale local polynomial expansions of the images. When the displacement field has been computed, a plane + parallax approach is used to separate moving objects from the camera egomotion.

We present an enhanced block matching approach to improve displacement accuracy in ultrasound sequences using a combination of matching measures. The first measure uses the normalised cross correlation for regions of strong signal and the second measure CD , specifically for regions of speckle determined by the speckle signal to noise ratio. We also show displacement field results for simulated...

Normal Flow Let~ı and ~ be the unit vectors in the x and y directions, respectively; δ~r =~ıδx+~δy is the projected displacement field at the point ~r = x~ı + y~. If we choose a unit direction vector ~nr = nx~ı + ny~ at the image point ~r and call it the normal direction, then the normal displacement field at ~r is δ~rn = (δ~r ·~nr)~nr = (nxδx+nyδy)~nr. The normal direction ~nr can be chose...

Reinforced concrete is a composite material consisting in a rebar embedded in a concrete matrix. The structural equilibrium depends of the quality of bond between the two materials as well as the intrinsic quality of each of the components. When the structure is submitted to heating, cracking can occur due to the difference in thermal expansion properties between the two materials. In the prese...