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This paper presented an automatic morphological method to extract a vascular tree using an angiogram. Under the assumption that vessels are connected in a local linear pattern in a noisy environment, the algorithm decomposes the vessel extraction problem into several consecutive morphological operators, aiming to characterize and distinguish different patterns on the angiogram: background, approximate...
Fuzzy region based image retrieval algorithms and relevance feedback algorithms have been active research areas. However, most relevance feedback algorithms can't be used in Fuzzy region based image retrieval system because of the complexity of fuzzy similarity expression. To overcome the problem, this paper modifies the equation to calculate the fuzzy similarity and proposes a new relevance feedback...
In this paper, a scheme using fuzzy mathematical morphology operations is proposed for extracting coronary arteries tree on angiogram. After the enhancement of image with the traditional morphological top-hat operator, the vessel image is filtered with the fuzzy morphological opening with a set of linear structuring elements at different orientation. At the same time, the enhanced image is also filtered...
A Mobile Ad hoc Network (MANET) is one consisting of a set of mobile hosts capable of communicating with each other without the assistance of base stations. Earlier research has proposed several unipath routing protocols specifically on MANET However, the single path is easily broken and needs to perform a route discovery process again due to the dynamic topology of ad hoc networks. To alleviate these...
Mobile ad hoc networks (MANETs) with limited resources and highly dynamic nature make routing unstable and challenging. The major challenge for MANETs is therefore to establish reliable routes. In this paper, we propose a new routing algorithm called reliable probabilistic grid routing algorithm (RPGRA). RPGRA is a location based routing algorithm and it exploits the concept of a routing protocol...
This paper realizes a new method to segment intracranial structure from series of cerebral computerized tomography (CT) automatically. Firstly, a region growing and morphology based approach is developed to extract intracranial structures from series cerebral computerized tomography with the knowledge of anatomy, and then focusing on the problems of parameter initialization of the expectation maximization...
A mobile ad hoc network (MANET) is one consisting of a set of mobile hosts capable of communicating with each other without the assistance of base stations. Earlier research has proposed several unipath routing protocols specifically on MANET. However, the single path is easily broken and needs to perform a route discovery process again due to the dynamic topology of ad hoc networks. This leads to...
In most mobile ad hoc networks (MANETs) clustering protocols, the clusterhead nodes take on a special role in managing routing information. However, the frequent changes of the clusterheads affect the performance of the routing protocol. Eventually, the clustering stability in MANETs would be significantly affected. The route between two nodes changes constantly as the clusterhead set changes. Stability...
Since nodes in the mobile ad hoc networks (MANETs) network move freely and randomly, routes often get disconnected. The major challenge for MANETs is therefore to implement routing protocols that must respond to changes in the network topology in order to maintain and reconstruct the routes in a timely manner as well as to establish reliable routes. In this paper, we propose a new routing algorithm...
A mobile ad hoc network (MANET) is one consisting of a set of mobile hosts capable of communicating with each other without the assistance of base stations. Earlier research has proposed several unipath routing protocols specifically on MANET, but most studies have not focused on the limitations of battery resource. To alleviate these problems, a new routing protocol called energy-aware grid multipath...
A mobile ad hoc network (MANET) is one consisting of a set of mobile hosts capable of communicating with each other without the assistance of base stations. Earlier research has proposed several unipath routing protocols specifically on MANET. However, the single path is easily broken and needs to perform a route discovery process again due to the dynamic topology of ad hoc networks. This leads to...
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