Motion and velocity are essential parameters for an Unmanned Aerial Vehicle (UAV) during critical maneuvers such as landing or take-off. In this paper, we present a hybrid stereoscopic rig made of a fisheye and a perspective cameras for motion estimation. The rotation and translation are estimated by a decoupling. The fisheye view contributes to determine the orientation and the attitude while ...

In this paper we propose a method which uses motion in the field of view of two un-calibrated cameras to produce a disparity map relative to the cameras. Current stereo vision initialisation techniques focus on time consuming manual calibration of stereo cameras. This research demonstrates the use of a novel algorithm which uses motion to determine conjugate pairs of points. The disparity map i...

interference resulted in some cohesin loading onto meiotic chromosomes. This partial loading of cohesin resulted in similar defects in DNA repair that were now competent to activate the DNA damage checkpoint. The involvement of cohesin in the DNA damage response during a specialized cell division in which the sister chromatid is not the preferred partner in repair raises the question of what ro...

For legged robots learning how to move efficiently requires an estimate of the motion that is being created, in particular velocity estimation is of importance. Because common sensors available for legged robots cannot provide good velocity estimates, the focus of this project has been on using visual sensors to measure this velocity. Because of their information-rich output, visual sensors off...

The motion recovery for a class of movements in the space by using stereo vision is considered by observing at least three points in this paper. The considered motion equation can cover a wide class of practical movements in the space. The observability of this class of movement is clarified. The estimations of the motion parameters which are all time-varying are developed in the proposed algor...

In this paper, a new active vision based camera self-calibration technique is proposed. The novelty of this new technique is that it can determine LINEARLY all the FIVE intrinsic parameters of a camera. The basic principle of our new calibration technique is to use the planar information in the scene and to control the camera to undergo several sets of orthogonal planar motions. Then, a set of ...

Human motion capture has lately been the object of much attention due to commercial interests. A ”touch free” computer vision solution to the problem is desirable to avoid the intrusiveness of standard capture devices. The object to be monitored is known a priori which suggest to include a human model in the capture process. In this paper we use a model-based approach known as the analysis-bysy...

Reading speed in normal peripheral vision is slow but can be increased through training on a letter-recognition task. The aim of the present study is to investigate the sensory and cognitive factors responsible for this improvement. The visual span is hypothesized to be a sensory bottleneck limiting reading speed. Three sensory factors-letter acuity, crowding, and mislocations (errors in the sp...

The influence of monocular occlusion cues on the perceived direction of motion of barber pole patterns is examined. Unlike previous studies that have emphasized the importance of binocular disparity, we find that monocular cues strongly influence the perceived motion direction and can even override binocular depth cues. The difference in motion bias for occluders with and without disparity cues...

Relative binocular disparity cannot tell us the absolute 3D shape of an object, nor the 3D trajectory of its motion, unless the visual system has independent access to how far away the object is at any moment. Indeed, as the viewing distance is changed, the same disparate retinal motions will correspond to very different real 3D trajectories. In this paper we were interested in whether binocula...