A B S T R A C T Nowadays. the automat izalton of railway maintenance work i s a rirm requirenent. In ordpr to respond in part to t h i s requirement. a practical ohstacle detecting syslcm based on an ori~inal laser-sectioning method has been developed. I t *as conrlrmed that the calibration for the ohstacle detcction was porlorm~d to an accuracy of mnrr than 5 mm. Noreover. a ttieoretical e s t...

IVe present a. coiiiputatioiial niodel of liuiiian testure segiiieiit+ tioii ancl asgne for its utility in niachine vision. Major tlieories due to dnlesz and Beck attribute preattent,ive texture segmentation to differences in first-order statistics of stininlus features such as oriciitat.ion, size and briglitliess of constituent eleiiients. An dternat,ive ayproa.ch seeks to esploi t psycliopliy...

We describe an operational program that l o cates objects in a television image and traces their edges. The program accommodates the te levision camera, maximizing dynamic range during acquisit ion and sensi t iv i ty during t racing, to obtain the most appropriate image for each phase. If the trace routine loses an edge, various heurist ics diagnose the d i f f i c u l t y and tune both the ca...

The practical deployment of distributed agent-based systems mandates that each agent behave sensibly. This paper focuses on the development of flexible, responsive, adaptive systems based on Sensible Agents. Sensible Agents perceive, process, and respond based on an understanding of both local and system goals. Each agent is capable of (1) deliberative or reactive planning and execution of one ...

A bstract. T he periodic behavior of a particu lar class of dynamical sys tems , the cellular automata (CA) , is studied . A lar ge class of CAs is defined , (containing both addit ive and nonadditive CAs) in terms of the sensi tivity of t he local rule on which the CA is based . For this class , the set of configurations which ente r a cycle afte r a finit e number of it erat ions is complete ...