A method of detecting moving objects from an image sequence acquired by a single moving camera is presented. No assumptions about the movement of the camera platform is made. Motion detection from a moving platform is a non-trivial problem as the moving camera induces apparent motion in the entire image. The epipolar geometric constraint is used between matched points in consecutive image frame...

In this paper, we propose a new method to extract moving objects from a video stream without any motion estimation. The objective is to obtain a method robust to noise, large motions and ghost phenomena. Our approach consists in a frame differencing strategy combined with a hierarchical segmentation approach. First, we propose to extract moving edges with a new robust difference scheme, based o...

A theory is developed which relates quasi-elastic light scattering measurements to blood flow in tissue micro-vasculature. We assume that the tissue matrix surrounding the blood cells is a strong diffuser of light and that moving erythrocytes, therefore, are illuminated by a spatially distributed source. Because the surrounding tissue is considered to be stationary, Doppler shifts in the freque...

Fabrication by the ‘Laser-LIGA’ process of three-dimensional structures for micro-fluidic devices is investigated. Polymer moulds are formed by projection ablation using an excimer laser operating at 248 nm wavelength. The moulds are replicated by electroforming — as in conventional X-ray LIGA — to produce fixed and freely moving nickel microturbine parts with heights of 150 lm, wall angles of ...

To organise in vitro neural networks at the cellular level and study their electrical patterns, we have fabricated 4 x 4 planar microelectrode arrays using conventional photolithography. The electrode sites of these arrays are located inside micro-wells, for confining the neurons, which are connected with neighbouring wells via micro-trenches capable of guiding the outgrowth of neurites. In ord...

Historical and future trends in sustainability performance show that the world’s countries have substantially overshot their fair share of most planetary boundaries, without proportional social achievements.