We introduce a new approach for image noise cancellation based on fuzzy similarity. The proposed method allows for simple tuning of fuzzy filter properties and is very convenient for high-speed real-time processing. A...
详细信息
Color segmentation is crucial in robotic applications, such as RoboCup, where the relevant objects can be distinguished by their color. In these applications, real-time performance and robustness are primary concerns....
详细信息
For most of the FBW aircraft flying today, the control laws have been developed by using classical single-loop frequency responses and root locus design techniques. Moreover, gain scheduling is the most common systema...
详细信息
Humans gather information from the environment around them using different senses, e.g. sight, hearing, touch, smell and taste. By combining sensory information, we are able to structure decisions and actions when int...
详细信息
Humans gather information from the environment around them using different senses, e.g. sight, hearing, touch, smell and taste. By combining sensory information, we are able to structure decisions and actions when interacting with the environment. Humans are capable of actively using perception capabilities in order to perform objectives in time and space. The objective of this paper is to discuss a biologically inspired sensor fusion model, named sensor fusion model with active perception (SEFMAP). The biological inspiration concept is not used to indicate biological plausibility in the sense of circuitry, networking architecture and information exchange modalities of proposed models, but the modeling point of view. SEFMAP has been developed by mimicking the human way of processing information received from sensory organs. This gives a simple and general model with great development potential, properties that in some degree are missing in existing models. SEFMAP was intended for modeling intelligent sensor fusion systems as well as traditional sensor fusion systems The model discussed in this paper, SEFMAP, includes three main processes (sensation, perception and active perception) as well as a knowledge base. SEFMAP reflects signal processing on sensory information that occurs on the way to the brain, as well as in the brain. The model also handles memory and decision-making to bring the system closer to an objective that may be changed during run-time. The benefits of SEFMAP are demonstrated in three examples, a classification application, an auditory-visual target localization system and a fire indication system. The paper also considers how time affects the result of the sensor fusion algorithm.
Color segmentation is crucial in robotic applications, such as RoboCup, where the relevant objects can be distinguished by their color. In these applications, real-time performance and robustness are primary concerns....
详细信息
Color segmentation is crucial in robotic applications, such as RoboCup, where the relevant objects can be distinguished by their color. In these applications, real-time performance and robustness are primary concerns. We present a hybrid method for color segmentation based on seeded region growing (SRG) in which the initial seeds are provided by a conservative threshold color segmentation. The key to the robustness of our approach is to use multiple seeds to perform local blob growing, and then merge blobs that belong to the same region. We have implemented our technique on a team of Sony AIBO 4-legged robots, and have successfully tested it in the RoboCup 2001 competition.
Indoor environments typically consist of sets of connected room-like spaces. We present a local technique that uses range data to detect these spaces during navigation. Our technique includes two parts: segmentation, ...
详细信息
Indoor environments typically consist of sets of connected room-like spaces. We present a local technique that uses range data to detect these spaces during navigation. Our technique includes two parts: segmentation, which isolates room-like spaces and detects when the robot has entered a new one; and feature extraction, which associates each space with a set of geometric features useful for navigation or recognition. Many such features can be considered: here we propose a new method to compute width and length of a rectangular room in a way which is largely invariant with respect to the configuration of the furniture. We report experimental results that show the performance of our technique, and hint at a possible use of this technique for coarse localization on a topological map.
In autonomous robotics, so-called artificial potential fields are often used to plan and control the motion of a physical robot. In this paper, we propose to use an artificial electric field to address the problem or ...
详细信息
“Team Sweden” is the Swedish national team that entered the Sony legged robot league at the RoboCup2001 competition. The work was distributed over three universities in Sweden. This nationwide character has made the...
ISBN:
(纸本)3540439129
“Team Sweden” is the Swedish national team that entered the Sony legged robot league at the RoboCup2001 competition. The work was distributed over three universities in Sweden. This nationwide character has made the project organization particularly demanding, but has resulted in a rewarding cooperation experience, both scientific and human. The Team identity is as follows: Team Leader: Alessandro Saffiotti (asaffio@***) Team Members: include the authors, plus: R. Johansson (?rebro); P. Davidsson, D. Erman, and J. Kronqvist (Blekinge); J. Carstensen, P. Eklund, P. Larsson, and K. Prorok (Ume?). Sponsors: Swedish KK foundation, Qualisys AB, ?rebro University, Ume? University, and the Blekinge Institute of Technology. Team home page: http://***/Living/RoboCup/.
Sliding mode control algorithms can provide high robustness with respect to bounded disturbances and parameter variations. However, the classical design procedure sets strong restrictions on the choice of a sliding su...
详细信息
Sliding mode control algorithms can provide high robustness with respect to bounded disturbances and parameter variations. However, the classical design procedure sets strong restrictions on the choice of a sliding surface. In this paper we propose a new algorithm which employs a Takagi-Sugeno fuzzy system to represent the sliding surface. It can provide nearly time-optimal behavior of the system and still retain the robustness properties.
Anchoring is the process of creating and maintaining the correspondence between symbols and percepts that refer to the same physical objects. Although this process must necessarily be present in any symbolic reasoning...
Anchoring is the process of creating and maintaining the correspondence between symbols and percepts that refer to the same physical objects. Although this process must necessarily be present in any symbolic reasoning system embedded in a physical environment (e.g., an autonomous robot), the systematic study of anchoring as a clearly separated problem is just in its initial phase. In this paper we focus on the use of symbols in actions and plans and the consequences this has for anchoring. In particular we introduce action properties and partial matching of objects descriptions. We also consider the use of indefinite references in the context of action. The use of our formalism is exemplified in a mobile robotic domain.
暂无评论