We describe a surveillance system which allows a mobile robot, operating within a familiar setting, to detect unexpected changes in the environment (i.e., presence or absence of objects or persons, unexpectedly opened...
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ISBN:
(纸本)0780378660
We describe a surveillance system which allows a mobile robot, operating within a familiar setting, to detect unexpected changes in the environment (i.e., presence or absence of objects or persons, unexpectedly opened/closed doors or windows, etc.). To achieve this, the robot "looks at" the environment through a TV camera;next, it compares what "it sees" in a specific moment with what "it should see" at that same location. In particular, an approach is proposed for images comparison which requires to find color clusters in the color histograms corresponding to the images to be compared: by analyzing the color clusters in the two images, the system detects similarities or differences between them and consequently deduces if something has changed in the scene. Since the techniques proposed in literature usually rely on the geometrical characteristics of the objects to be detected (besides cromination), "ad hoc" algorithms have been implemented for color clusters comparison;the proposed techniques can be used alone or in cooperation with existing pattern recognition methods in order to increase the performance of the whole system.
This paper describes a visual simultaneous localization and mapping (VSLAM) method for a pipe inspection robot that can serve as a carrier for nondestructive testing (NDT) sensors inside in-service water mains. The pr...
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ISBN:
(纸本)9781424407897
This paper describes a visual simultaneous localization and mapping (VSLAM) method for a pipe inspection robot that can serve as a carrier for nondestructive testing (NDT) sensors inside in-service water mains. The proposed method features a multi-sensor fusion system that simultaneously executes two important functions of the robot: construct a global image of the internal surface of the pipe and provide the location of the NDT sensors. The fusion involves a synergy between image mosaicing and dead reckoning. More precisely, the sequential images of a digital camera are stitched together with the help of an inertial navigation system (INS). In the proposed model, the processing load of image mosaicing is reduced significantly, and at the same time the accumulation of error of the INS is prevented. The functionality of the model is verified using a simulator that mimics the motion of a pipe inspection robot inside a water main.
robotics is a fascinating field of engineering that provides many opportunities for research. In addition, the evolution of technology in recent years has led to intelligent mobile robots. They can be sent in hard pla...
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ISBN:
(纸本)9781479946945
robotics is a fascinating field of engineering that provides many opportunities for research. In addition, the evolution of technology in recent years has led to intelligent mobile robots. They can be sent in hard places for humans either because they are dangerous, either because they are difficult to access. The control of these robots, however, is a difficult task that involves knowledge in different areas such as robotics, automation, programming, electronics, etc. The article presents a dedicated application for robot motion planning using the homogeneous decomposition method and Lee's algorithm. The application can be used to simulate real life situations and it is part of a bigger project which intends to create an artificial intelligence control system for mobile robots.
Autonomous navigation of a mobile robot is a challenging task. Much work has been done in indoor navigation in the last 10-15 years. Fewer results have been obtained in outdoor robotics. Laser range finder technology ...
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Fisheye cameras offer a wider field of view compared to traditional pinhole cameras. This paper presents a pose estimation method for fisheye cameras based on the EPnP algorithm. A unified projection model is used to ...
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In this paper we address a new problem in reinforcement learning. Here we consider an agent that faces multiple learning tasks within its lifetime. The agent's objective is to maximize its total reward in the life...
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ISBN:
(纸本)0780378660
In this paper we address a new problem in reinforcement learning. Here we consider an agent that faces multiple learning tasks within its lifetime. The agent's objective is to maximize its total reward in the lifetime as well as a conventional return in each task. To realize this, it has to be endowed an important ability to keep its past learning experiences and utilize them for improving future learning performance. This time we try to phrase this problem formally. The central idea is to introduce an environmental class, BV-MDPs that is defined with the distribution of MDPs. As an approach to exploiting past learning experiences, we focus on statistics (mean and deviation) about the agent's value tables. The mean can be used as initial values of the table when a new task is presented. The deviation can be viewed as measuring reliability of the mean, and we utilize it in calculating priority of simulated backups. We conduct experiments in computer simulation to evaluate the effectiveness.
This paper presents a new approach to the prediction of visual occlusions for a robotic system performing visual servoing tasks. The case of a multi-arm robotic cell equipped with a multi-camera eye-to-hand visual sys...
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As the beginning of the 3D soccer simulation competitions the simulated humanoid robots were used to play soccer in simulated games, this event shifted the aim of the soccer simulation from the design of strategic beh...
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ISBN:
(纸本)9781424448081
As the beginning of the 3D soccer simulation competitions the simulated humanoid robots were used to play soccer in simulated games, this event shifted the aim of the soccer simulation from the design of strategic behaviors into the low level skills like walking and kicking in soccer player itself at first, but by the improvement of these skills new challenge of how to play soccer has been engendered, so having a framework for agents that supports a hierarchy of behaviors is inevitable, in this paper we proposed a behavior structure for agents which consists of low level skills such as kicking and walking and high level skills like ball-handled and go to ball which uses a combination of low level skills, and also a simple method of opponent modeling called Harmonic opponent modeling which model the walking speed of opponent agent.
This paper is about the implementation of grasping skills in a humanoid robot. Following a developmental approach the robot is initially equipped with little perceptual and motor competencies whose role is to bootstra...
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In the submillimetric objects manipulations, the adhesion (capillary force, pull-off force and Van-der-Waals force) and the electrostatic forces affect the behavior of the micro-objects. These forces decrease signific...
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