Erratum to “The use of direction and distance information in the perception of trajectory” [Vision Res. 47 (7) (2007) 899–912]

Erratum to “The effects of perceptual history on memory of visual objects” [Vision Res. 47/7 (2007) 965–973]

The use of direction and distance information in the perception of approach trajectory

A pair of projectiles travelling on parallel trajectories produce differing patterns of retinal motion when they originate at different distances. For an observer to recognise that the two trajectories are parallel she must "factor out" the effect of distance on retinal motion. The observer faces a similar problem when physically parallel trajectories originate at different lateral positions; h...

A New Vision-Based and GPS-Signal-Independent Approach in Jamming Detection and UAV Absolute Positioning Assessment

The Unmanned Aerial Vehicles (UAV) positioning in the outdoor environment is usually done by the Global Positioning System (GPS). Due to the low power of the GPS signal at the earth surface, its performance disrupted in the contaminated environments with the jamming attacks. The UAV positioning and its accuracy using GPS will be degraded in the jamming attacks. A positioning error about tens of...

Ball Trajectory Estimation and Robot Control to Reach the Ball Using Single Camera

In robotics research, catching a projectile object with a robotic system is one of the challenging problems. The outcome of these researches can be used in a wide range of applications such as video surveillance systems, analysis of sports videos, monitoring programs for human activities, and human-machine interactions. In this paper, we propose a new vision-based algorithm to estimate the traj...

GPS Jamming Detection in UAV Navigation Using Visual Odometry and HOD Trajectory Descriptor

Auto-navigating of unmanned aerial vehicles (UAV) in the outdoor environment is performed by using the Global positioning system (GPS) receiver. The power of the GPS signal on the earth surface is very low. This can affect the performance of GPS receivers in the environments contaminated with the other source of radio frequency interference (RFI). GPS jamming and spoofing are the most serious a...