an important issue in power generation and petrochemical industries is the monitoring of pipe wall thickness and corrosion/erosion rate. the pipes are usually subject to erosive and/or corrosive environments and any failure could be catastrophic. while periodic manual ultrasonic thickness measurement is the common practice in many industries, in certain cases, where higher accuracies are requir...

the andeka earthquake of 25/09/2002 (mw = 5.6) shocked the northeast region of the city of masjed-soleyman in zagros folded belt. the event caused no life loss but 4 people were reported to be injured. the quake occurred in the southern parts of the zagros belt in an oil-rich area. no damage could be observed in the masjed-soleyman dam site, which is the most important hydroelectric infrastruct...

In this paper we consider the task of articulated 3D human pose estimation in challenging scenes with dynamic background and multiple people. Initial progress on this task has been achieved building on discriminatively trained part-based models that deliver a set of 2D body pose candidates that are then subsequently refined by reasoning in 3D [1, 4, 5]. The performance of such methods is limite...

This paper presents a method for video sequence coding, using motion estimation over a triangular object-based mesh. We introduce a novel “crack line” notion to deal with motion discontinuities and to improve representation scalability. The optimization of the nodal motion vectors is performed by means of a multi-resolution differential method, further improved by “backward in forward” tracking...

One of the most difficult aspects of visual object tracking is the handling of occlusions and target appearance changes due to variations in illumination and viewing direction. To address these challenges we introduce a novel tracking technique that relies on component-based target representations and on robust fusion to integrate model information across frames. More specifically, we maintain ...

Structural classiication of edges is investigated by interpretation of visual motion from uncalibrated stereo views. Local surface patches close to edges are modeled by a planar description to simplify the determination of their associated mappings between the two projected views. The projectivity between the corresponding patches in the stereo images is parameterized under epipolar constraints...

An agent-based model, incorporating a small set of primarily agent-based variables, was designed to explain land-use decision making. Agents are land-owners, who allocate their labour and land for different uses in regular time intervals. The goal is to understand what kind of spatial patterns emerge from different agent characteristics, and decision and learning mechanisms. Landscapes produced...

In order to improve efficiency of video coding, temporal redundancy between neighboring frames can be reduced. In MPEG-2, some frames, named interframes, are predicted using a motion estimation based on the conservation of the intensity over time. In the new standard MPEG-4, frames are separated into several objects that are transmitted separately. Therefore, the prediction has to be performed ...