Carlos Paredes | Tec de Monterrey (original) (raw)
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The University of the West Indies, Mona, Jamaica
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Papers by Carlos Paredes
We propose an approach covering both the linguistic and engineering dimensions of the behavioral ... more We propose an approach covering both the linguistic and engineering dimensions of the behavioral specification of reactive systems. On the language side, systems, their components and connectors, are described through CV-Nets. CV-Nets are a formal graph-oriented language which includes attributes, actions and behavioral rules based on deontic and temporal logic. It is shown how the model promotes concurrency, modularity, reusability, abstraction, and refinement of specifications. The engineering side is based on category theory as a support for (i) specialization and refinement of abstract specifications and frameworks (following a top-down tailoring approach), as well as for (ii) the modeling and composition of components and connectors (following a bottom-up construction approach).
IEEE Transactions on Robotics and Automation, 1998
This article describes one solution for the problem of pursuit of objects moving on a plane by us... more This article describes one solution for the problem of pursuit of objects moving on a plane by using a mobile robot and an active vision system. The solution deals with the interaction of different control systems using visual feedback and it is accomplished by the implementation of a visual gaze holding process interacting cooperatively with the control of the trajectory of a mobile robot. These two systems are integrated to follow a moving object at constant distance and orientation with respect to the mobile robot. The orientation and the position of the active vision system running a gaze holding process give the feedback signals to the control used to pursuit the target in real-time. The paper addresses the problems of visual fixation, visual smooth pursuit, navigation using visual feedback and compensation for system's movements. The algorithms for visual processing and control are described in the article. The mechanisms of cooperation between the different control and visual algorithms are also described. The final solution is a system able to operate at approximately human walking rates as the experimental results show in the paper
Real-time Imaging, 1997
his paper is concerned with a computational solution for normal optical flow estimation using spa... more his paper is concerned with a computational solution for normal optical flow estimation using space-variant image sampling. The article describes one solution for the problem based on log-Tpol ar images, including the algorithm implementation on digital signal processing hardware. The log-polar structure achieves high data compressing rates by maintaining a high resolution area-the fovea-and a space-variant resolution-the retinal periphery. This sampling scheme enables the implementation of selective processing, characteristic of attentive vision. The solution was developed to be used with an active vision system to pursue moving objects, assuming that the cameras could also move. Some properties of the log-polar structure are also described and the main results of the implementation are presented.
This article describes one solution for the problem of pursuit by using a mobile robot and an act... more This article describes one solution for the problem of pursuit by using a mobile robot and an active vision system. The solution deals with the interaction of different control systems using visual feedback and it is accomplished by the implementation of a visual gaze holding process interacting cooperatively with the control of the trajectory of a mobile robot. These two systems are integrated to follow a moving object at constant distance and orientation with respect to the mobile robot. The orientation and the position of the active vision system running a gaze holding process give the feedback signals to the control used to pursuit the target in real-time. The mechanisms of cooperation between the different control and visual algorithms are described. The final solution is a system able to operate at approximately human walking rates
El primer paso para hacer el modelo de datos es identificar las entidades (tablas)que vamos a ten... more El primer paso para hacer el modelo de datos es identificar las entidades (tablas)que vamos a tener. Según el caso de uso descrito, las tablas necesarias son las siguientes (al menos, son las que nosotros usamos):
We propose an approach covering both the linguistic and engineering dimensions of the behavioral ... more We propose an approach covering both the linguistic and engineering dimensions of the behavioral specification of reactive systems. On the language side, systems, their components and connectors, are described through CV-Nets. CV-Nets are a formal graph-oriented language which includes attributes, actions and behavioral rules based on deontic and temporal logic. It is shown how the model promotes concurrency, modularity, reusability, abstraction, and refinement of specifications. The engineering side is based on category theory as a support for (i) specialization and refinement of abstract specifications and frameworks (following a top-down tailoring approach), as well as for (ii) the modeling and composition of components and connectors (following a bottom-up construction approach).
IEEE Transactions on Robotics and Automation, 1998
This article describes one solution for the problem of pursuit of objects moving on a plane by us... more This article describes one solution for the problem of pursuit of objects moving on a plane by using a mobile robot and an active vision system. The solution deals with the interaction of different control systems using visual feedback and it is accomplished by the implementation of a visual gaze holding process interacting cooperatively with the control of the trajectory of a mobile robot. These two systems are integrated to follow a moving object at constant distance and orientation with respect to the mobile robot. The orientation and the position of the active vision system running a gaze holding process give the feedback signals to the control used to pursuit the target in real-time. The paper addresses the problems of visual fixation, visual smooth pursuit, navigation using visual feedback and compensation for system's movements. The algorithms for visual processing and control are described in the article. The mechanisms of cooperation between the different control and visual algorithms are also described. The final solution is a system able to operate at approximately human walking rates as the experimental results show in the paper
Real-time Imaging, 1997
his paper is concerned with a computational solution for normal optical flow estimation using spa... more his paper is concerned with a computational solution for normal optical flow estimation using space-variant image sampling. The article describes one solution for the problem based on log-Tpol ar images, including the algorithm implementation on digital signal processing hardware. The log-polar structure achieves high data compressing rates by maintaining a high resolution area-the fovea-and a space-variant resolution-the retinal periphery. This sampling scheme enables the implementation of selective processing, characteristic of attentive vision. The solution was developed to be used with an active vision system to pursue moving objects, assuming that the cameras could also move. Some properties of the log-polar structure are also described and the main results of the implementation are presented.
This article describes one solution for the problem of pursuit by using a mobile robot and an act... more This article describes one solution for the problem of pursuit by using a mobile robot and an active vision system. The solution deals with the interaction of different control systems using visual feedback and it is accomplished by the implementation of a visual gaze holding process interacting cooperatively with the control of the trajectory of a mobile robot. These two systems are integrated to follow a moving object at constant distance and orientation with respect to the mobile robot. The orientation and the position of the active vision system running a gaze holding process give the feedback signals to the control used to pursuit the target in real-time. The mechanisms of cooperation between the different control and visual algorithms are described. The final solution is a system able to operate at approximately human walking rates
El primer paso para hacer el modelo de datos es identificar las entidades (tablas)que vamos a ten... more El primer paso para hacer el modelo de datos es identificar las entidades (tablas)que vamos a tener. Según el caso de uso descrito, las tablas necesarias son las siguientes (al menos, son las que nosotros usamos):