A new optical arrangement is introduced for such applications of machine vision that need to discriminate structured laser lighting from stray ambient lighting. Instead of using transmissive filters that usually have ...
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ISBN:
(纸本)081944300X
A new optical arrangement is introduced for such applications of machine vision that need to discriminate structured laser lighting from stray ambient lighting. Instead of using transmissive filters that usually have high attenuation, a double reflective filter arrangement is presented. A combination of dielectric and metallic mirrors achieves steep stopband attenuation especially in the near infrared region where Si detectors are sensitive and common blackbody-like radiators have high spectral density. An additional advantage follows from the compact size of such a Maksutov-type mirror telescope. Compared to a corresponding refractive design, the length is reduced to less than half.
An approach to image analysis is described consisting of five stages: edge detection, thresholding, linking, shape description and shape abstraction. The approach is illustrated by applying the steps to the problem of...
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ISBN:
(纸本)0819413208
An approach to image analysis is described consisting of five stages: edge detection, thresholding, linking, shape description and shape abstraction. The approach is illustrated by applying the steps to the problem of automatic inspection.
Cooperation between several mobile robots enables to address more complex tasks or to provide more robust performance. Navigation and localisation forms the basis for the coordination and autonomous behaviours of team...
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ISBN:
(纸本)081945561X
Cooperation between several mobile robots enables to address more complex tasks or to provide more robust performance. Navigation and localisation forms the basis for the coordination and autonomous behaviours of teams of mobile robots. Therefore analyses of the kinematics and of the sensor field of view for the different vehicles are summarized in order to characterize robust formations during movements. In this approach optimized robot formations with respect to the given sensor configurations are maintained by the control system during the joint motion towards the target. The application of this method for guidance by a navigator and for cooperative manipulation tasks is discussed and tested with mobile robot hardware.
This paper describes an algorithm which recovers 6 degrees of freedom ( that is rotational and translational matrices R and T ) of polyhedral objects using L-corners in a monocular image. First the gradients of the ci...
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ISBN:
(纸本)0819404489
This paper describes an algorithm which recovers 6 degrees of freedom ( that is rotational and translational matrices R and T ) of polyhedral objects using L-corners in a monocular image. First the gradients of the cirtain object''s faces are determined using the constraints derived from angles of L-corners. R accompanied by the object is then determined. Second a constraint concerning T is derived from a junction point of a Lcorner. After that T is determined using a set of constraints derived from the L-corners that contributed to the determination of R. By assembling only those L-corners the cirtain object is recognized.
In this paper, we outline computations for visual age classification from facial images. For now, input images can only be classified into one of three age-groups: babies, adults, and senior adults. The computations a...
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ISBN:
(纸本)0819413208
In this paper, we outline computations for visual age classification from facial images. For now, input images can only be classified into one of three age-groups: babies, adults, and senior adults. The computations are based on cranio-facial development theory, and wrinkle analysis. In the implementation, first primary features of the face are found, followed by secondary feature analyses. Preliminary results with real data are presented.
Diffractive 2D and 3D grating optics as enabling technologies are on a good way to technically realize specific features well known in human vision. How does the human eye do its job in visual information processing?
ISBN:
(纸本)0819438626
Diffractive 2D and 3D grating optics as enabling technologies are on a good way to technically realize specific features well known in human vision. How does the human eye do its job in visual information processing?
Collision freeness is an essential feature in off-line programming of robots. It relates to safe and efficient operation, and becomes even more critical, when two or more robots are sharing the same work space, which ...
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ISBN:
(纸本)081942983X
Collision freeness is an essential feature in off-line programming of robots. It relates to safe and efficient operation, and becomes even more critical, when two or more robots are sharing the same work space, which is typical for so called holonic robot systems. Here we are reporting a simple and fast path planning algorithm based on configuration space method, suitable for holonic robot applications. The basic version of the algorithm can be found from the literature, and we have extended and modified it to improve its feasibility. Simulation and experimental tests have been carried out succesfully.
A new concept for knowledge representation and structure of the knowledge module for vision-guided robots is introduced. It allows the robot to acquire, accumulate and adapt automatically whatever knowledge it may nee...
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ISBN:
(纸本)0819438626
A new concept for knowledge representation and structure of the knowledge module for vision-guided robots is introduced. It allows the robot to acquire, accumulate and adapt automatically whatever knowledge it may need and to gain experience in the course of its normal operation, i.e., learning by doing, thus, to improve its skills and operating speed over time. The knowledge module is structured into a set of a fairly independent submodules each performing a limited task, and sub-knowledge bases each contains limited knowledge. Such a structure allows to use the acquired knowledge flexibly and efficiently. It makes also easily to extend the knowledge base when the robot's number of degrees of freedom that must be controlled increases. The concept was realized and evaluated in real-world experiments on an uncalibrated vision-guided 5-DOF manipulator to grasp a variety of differently shaped objects.
The paper presents a simple laser based triangulation system to acquire range images. The problems of high speed serpentine/raster scanning and sensor-output bottle-neck are addressed here by using a thin plane fan of...
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ISBN:
(纸本)0819413208
The paper presents a simple laser based triangulation system to acquire range images. The problems of high speed serpentine/raster scanning and sensor-output bottle-neck are addressed here by using a thin plane fan of laser light, and a linear variable neutral density filter. It also proposes a Prolog based integrated vision system environment for acquisition, processing, and understanding of range images.
An intelligent robot is a remarkably useful combination of a manipulator, sensors and controls. The use of these machines in factory automation can improve productivity, increase product quality and improve competitiv...
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ISBN:
(纸本)0819426407
An intelligent robot is a remarkably useful combination of a manipulator, sensors and controls. The use of these machines in factory automation can improve productivity, increase product quality and improve competitiveness. This paper presents a discussion of recent economic and technical trends. The robotics industry now has a billion-dollar market in the U.S. and is growing. Feasibility studies are presented which also show unaudited healthy rates of return for a variety of robotic applications. Technically, the machines are faster, cheaper, more repeatable, more reliable and safer. The knowledge base of inverse kinematic and dynamic solutions and intelligent controls is increasing. More attention is being given by industry to robots, vision and motion controls. New areas of usage are emerging for service robots, remote manipulators and automated guided vehicles. However, the road from inspiration to successful application is still long and difficult, often taking decades to achieve a new product. More cooperation between government, industry and universities is needed to speed the development of intelligentrobots that will benefit both industry and society.
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