In this paper we present a robust method for automatically matching features in images corresponding to the same physical point on an object seen from two arbitrary viewpoints. Unlike conventional stereo matching approaches we assume no prior knowledge about the relative camera positions and orientations. In fact in our application this is the information we wish to determine from the image fea...

We present a real-time localization system based on monocular vision and natural landmarks. In a learning step, we record a reference video sequence and we use a structure from motion algorithm to build a model of the environment. Then in the localization step, we use this model to establish correspondences between the 3D model and 2D points detected in the current image. These correspondences ...

The report of two cases of chest and kidney infections reminds of the possibility of distant infections caused by thrombophlebitic complications of cholesteatoma. Deep neck infection, mediastinitis, pleural empyema, pulmonary abscesses and hematogenic microabscesses of kidney have been proved by clinical, radiologic and laboratory examinations in two cholesteatoma patients. The clinical c...

In underwater computer vision, images are influenced by the water in two different ways. First, while still traveling through the water, light is absorbed and scattered, both of which are wavelength dependent, thus create the typical green or blue hue in underwater images. Secondly, when entering the underwater housing, the rays are refracted, affecting image formation geometrically. When using...

Leonardo’s multifaceted experience has often been celebrated as a key historical legacy placed in distant past. However, an interdisciplinary investigation of thought, studies and design intentionality, trying to combine art science, highlighted the cornerstones ante litteram territorialist vision. To finished product, Leonardo always prefers knowledge most intimate relationships among componen...

Estimation of camera motion from a given image sequence is a common task for multi-view 3D computer vision applications. Salient features (lines, corners etc.) in the images are used to estimate the motion of the camera, also called egomotion. This estimation suffers from an error built-up as the length of the image sequence increases and this causes a drift in the estimated position. In this l...

The study of sign languages provides a wide field of applications for computer vision systems, but the analysis of such gestures often leads to complex 3D reconstructions or to ambiguities. In this paper, we describe the architecture of an image analysis system that performs sign language analysis by using a prediction/verification approach. The system integrates a model of the sign language’s ...

| We address the problem of reconstructing 3D space in a projective framework from two or more views, and the problem of artiicially generating novel views of the scene from two given views (re-projection). We describe an invariance relation which provides a new description of structure, we call projective depth, which is captured by a single equation relating image point correspondences across...

We present a novel method for locating large amounts of local matches between images, with highly accurate localization. Point matching is one of the most fundamental tasks in computer vision, being used extensively in applications such as object detection, object tracking and structure from motion. The major challenge in point matching is to preserve large numbers of accurate matches between c...