Resumen In this paper, we present a vascular tree model made with synthetic materials and which allows us to obtain images to make a 3D reconstruction. We have used PVC tubes of several diameters and lengths that will let us evaluate the accuracy of our 3D reconstruction. In order to calibrate the camera we have used a corner detector. Also we have used Optical Flow techniques to follow the poi...

Recent experiments have shown that rapid kinematic mixing occurs in the pulmonary alveoli. Here the Reynolds number is very small, there is recirculation in the alveolar cavity and the alveolar walls move periodically. We have recently shown that non-diffusing particles move chaotically in a two-dimensional model flow with the above features. In parts of the lung, however, there is asynchrony b...

[A] Inner boundary localization: Edges are obtained over thresholded image using Sobel filters. Hough transform is improved by using the orientation of each pixel to reduce the search space from 3D i.e 3-tuple < x, y, r > to 1D of the radius only. It makes use of the key observation that “if an edge point lies on a circle, then the center of circle should lie on the normal to the edge direction...

In this paper, an improved method for estimating fundamental matrix is proposed. The method is applied effectively to monocular camera based moving object detection. The method consists of corner points detection, moving object’s motion estimation and fundamental matrix calculation. The corner points are obtained by using Harris corner detector, motions of moving objects is calculated from pyra...

[1] Drilling during ODP Leg 209, dredging, and submersible dives have delineated an anomalous stretch of the Mid-Atlantic Ridge north and south of the 15 200N Fracture Zone. The seafloor here consists dominantly of mantle peridotite with gabbroic intrusions that in places is covered by a thin, discontinuous extrusive volcanic layer. Thick lithosphere (10–20 km) in this region inhibits magma fro...

A lubrication-flow model for a free film in a corner is presented. The model, written in the hyperbolic coordinate system ξ = x2 − y2, η = 2xy, applies to films that are thin in the η-direction. The lubrication approximation yields two coupled evolution equations for the film thickness and the velocity field which, to lowest order, describes plug flow in the hyperbolic coordinates. A free film ...

Discontinuity detection plays an important role in image analysis applications like image registration, comparison, segmentation, time sequence analysis and object recognition. This paper presents a new approach for Corner Detection using First Order Difference Chain-Encoding. The proposed method is based on integer operations it is very simple and efficient. Preliminary results are presented a...

female patient, 54 years old, complained of excessive earing in the right eye for 12 years. After four years, he presented with progressive obstruction of the nasal assages. Approximately one year before presenting to his service, a bulging swelling, painful upon compression, ppeared near the inner corner of the right eye. On physial examination, she demonstrated epiphora in the right eye nd a ...