Fish-eye lens is a kind of short focal distance (f=6 similar to 16mm) camera. The field of view (FOV) of it is near or even exceeded 180x180 degrees. A lot of literatures show that the multiple view geometry system bu...
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ISBN:
(纸本)9781628414967
Fish-eye lens is a kind of short focal distance (f=6 similar to 16mm) camera. The field of view (FOV) of it is near or even exceeded 180x180 degrees. A lot of literatures show that the multiple view geometry system built by fish-eye lens will get larger stereo field than traditional stereo vision system which based on a pair of perspective projection images. Since a fish-eye camera usually has a wider-than-hemispherical FOV, the most of image processing approaches based on the pinhole camera model for the conventional stereo vision system are not satisfied to deal with the applications of this category of stereo vision which built by fish-eye lenses. This paper focuses on discussing the calibration and the epipolar rectification method for a novel machine vision system set up by four fish-eye lenses, which is called Special Stereo vision System (SSVS). The characteristic of SSVS is that it can produce 3D coordinate information from the whole global observation space and acquiring no blind area 360 degrees x360 degrees panoramic image simultaneously just using single vision equipment with one time static shooting. Parameters calibration and epipolar rectification is the basic for SSVS to realize 3D reconstruction and panoramic image generation.
The logical structure of robot vision systems is introduced. It can be used as a basis for designing such systems. Both sensor data fusion and knowledge representation in a vision system may be broken down into four h...
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ISBN:
(纸本)081944300X
The logical structure of robot vision systems is introduced. It can be used as a basis for designing such systems. Both sensor data fusion and knowledge representation in a vision system may be broken down into four hierarchical levels where at each level knowledge representation in the form of partial models and data fusion complement each other. Multi-processor architectures supporting this type of structure are introduced as a particularly efficient basis for robot vision systems. Practical implementation is given.
This paper introduces a tool developed for remote operation and simulation of swarms of robots. The tool provides a possibility for the user to easily and simultaneously operate multiple robots remotely. The robots ca...
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ISBN:
(纸本)081945561X
This paper introduces a tool developed for remote operation and simulation of swarms of robots. The tool provides a possibility for the user to easily and simultaneously operate multiple robots remotely. The robots can be either simulated or real physical robots. In addition to direct control of the robots, the user interface part of the tool can be used to develop robot behaviours using plug-ins made with Java or our graphical state machine editor. The development and testing of behaviours can be facilitated by using methods tested with the supporting simulation features of the tool before controlling real robots.
This paper describes a practical approach for environment perception using fusion of active ranging with a low-power laser and passive, stereo based ranging. A low-cost, coarse pitch linear detector is used, but still...
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ISBN:
(纸本)081942983X
This paper describes a practical approach for environment perception using fusion of active ranging with a low-power laser and passive, stereo based ranging. A low-cost, coarse pitch linear detector is used, but still sufficient distance accuracy for mobile robotics is achieved by using a new method of sub-pixel calibration. The device is intended for mobile robot or vehicle perception duties in obstacle detection and target position measurement.
This paper deals with a two-step segmentation algorithm for 2-D convex objects. First the objects are approximated by an elliptic shape description, and then the boundary of the object is refined using dynamic program...
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ISBN:
(纸本)0819413208
This paper deals with a two-step segmentation algorithm for 2-D convex objects. First the objects are approximated by an elliptic shape description, and then the boundary of the object is refined using dynamic programming. The reason for refinement is accurate shape classification.
A machine vision system has been developed to separate half cut peaches with small splinters from clean ones. The system uses the different spectral profile of both together with an ad hoc illuminating system. The sys...
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ISBN:
(纸本)0819426407
A machine vision system has been developed to separate half cut peaches with small splinters from clean ones. The system uses the different spectral profile of both together with an ad hoc illuminating system. The system is capable of process 30 half peaches per second. The hardware and software solutions are described.
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?
This paper presents a new exponential behavior based entropy operator for extracting image edges. Edges can be detected by computing the entropy of brightness or hue in a local region of a picture. The entropy depends...
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ISBN:
(纸本)0819413208
This paper presents a new exponential behavior based entropy operator for extracting image edges. Edges can be detected by computing the entropy of brightness or hue in a local region of a picture. The entropy depends not only on the rate of change of brightness or hue, but also on the average brightness or hue. The experimental result verifies the efficiency of the new entropy operator.
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.
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.
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