The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper we propose a novel skeletal muscle segmentation method driven from discrete optimization. We introduce a graphical model that is able to automatically determine appropriate seed positions with respect to the different muscle classes. This is achieved by taking into account the expected local visual and geometric properties of the seeds through a pair-wise Markov Random Field. The outcome...
We describe a cell segmentation approach based on a probabilistic formulation of multi-compartment level set-based deformable model. We aim at the simultaneous cell partitioning into nucleus and membrane. We consider relative topology of the two distinct cell compartments, while we constrain our solution using shape prior information. Our method integrates geometric models with learning-based classification...
The ad hoc network is composed of multiple sensor nodes to serve various applications, such as data collection or environmental monitoring. In many applications, the sensor nodes near the boundary of the deployment region provide biased or low-quality information because they have limited number of neighboring nodes and only partial information is available. Hence, the boundary recognition is an important...
In analog design flow, one of the most important issues is to achieve accurate resistor ratios during the layout phase, which is called resistor matching. In the literature, researchers have proposed several methodologies achieving high matching quality in a rectangular structure. However, under the fixed-outline constraint, layout designers will place normal blocks such as macros and intellectual...
This paper describes a new topology management and access control technique for wireless networks developed during Daniel's Camara PhD. The main purpose of the technique is to provide a stable and well managed topology, so that other protocols can be built on the top of it. Having a stable and predictable topology is a fundamental step to enable the real utilization of wireless networks, mainly for...
A cardinal prerequisite for the system design of a sensor network, is to understand the geometric environment where sensor nodes are deployed. The global topology of a large-scale sensor network is often complex and irregular, possibly containing obstacles/holes. A convex network partition, so-called segmentation, is to divide a network into convex regions, such that traditional algorithms designed...
We propose a novel flexible and hierarchical object representation using heterogeneous feature descriptors for detection of visual objects in real-world scenarios. Our representation is built on a Conditional Random Field (CRF) model that is able to aggregate local, semi-local and global features in one consistent framework. To improve the discriminative power of our model, we incorporate SVM classifiers...
This paper investigates the recent developments on switched-capacitor converters for high power applications. Based on an analysis on the shape of capacitor charging current for switched-capacitor converters, technologies used to improve the efficiency and reduce the Electromagnetic Interference (EMI), including the soft-switching and interleaving scheme, are discussed. Several existing topologies...
In this paper, we propose a 3D model retrieval system using sketch queries. The 3D model is described by a single characteristic view with the biggest exposure opportunity. The sketch query and the characteristic view are divided into several parts. Each part is quantized into a Fourier descriptor, and the spatial arrangements of these parts are measured by the graph spectra. Our contributions are...
Arabic words have a rich structure. They are made of subwords (groups of connected letters) and diacritical marks (dots). This paper proposes a sparse descriptor specifically designed for lexicon reduction in handwritten Arabic documents. The topological and geometrical features of subwords are extracted from the skeleton image, based on the concept of local density. The sparse descriptor is then...
This paper tackles the matching problem of partial deformable shapes with changing boundary and varying topology. We compute high-order graph matching directly on manifolds, without global/local surface parameterization. In particular, we articulate the heat kernel tensor (HKT), which is a high-order potential of geometric compatibility between feature tuples measured by heat kernels within bounded...
A novel scheme is presented that allows individual nodes in sensor networks to achieve network/topology-awareness by listening to regular packets associated with applications. Nodes, initially oblivious to network topology and their position within the network, gradually infer information required to evaluate their own Virtual Coordinates (VCs). A Singular Value Decomposition based transformation...
Most computer vision methods deal with the single object recognition problem. If an object is so small that little features can be used to support recognition procedure, the relationship between multi-objects could be helpful. In many cases, small objects are likely to be arranged by some regular shapes. To recognize these arrays, the paper presents a spatial topology detection algorithm. We call...
This paper investigates the topology design and formation control of robot swarms inside a desired region. A novel multilevel based swarm topology, which consists of numerous co-centered regular hexagons, is proposed to present different formation shapes within the desired region. A potential function based controller is developed to achieve the designed formation of swarm robots. The controller contains...
Topology has significant effects on the most important parameters of a network such as latency and power consumption. The sphere based topology is a new structure for Network-on-Chips that forms in sphere shape. We have used a Zone-Order label based algorithm for the routing that is a general algorithm for routing requirements, and it is based on spanning tree. We have compared sphere based topology...
Posture language is rich in ways for individuals to express a variety of desire, feelings and thoughts. Recognizing human posture via computer is a challenging task as it involved multiple issues ranging from image, recognition algorithm and system resources. This proposed work aimed to solve viewpoint variation issue through causal topology design Hidden Markov Model (HMM) for view independent multiple...
To extract the characters of Chinese efficiently and simulating the information of writing process, a method of characters extraction of off-line handwritten Chinese which is based on procedure neuron network is advanced in this paper. The stroke type and location, and the topology of the handwritten Chinese character are analyzed, the stroke writing order is simulated, and a procedure neuron network...
As the number of buses in multi-core SoC designs increase, bus planning problems become a dominant factor in determining the chip performance. To cope with these issues, it is desirable to consider them in the early floorplanning stage. Recently, many bus-driven floorplanners have been proposed in the literature. However, those proposed algorithms only consider the bus planning problem without the...
Regulation of cell growth and proliferation has a fundamental role in tissue development, organogenesis, and disease progression. Conserved distribution of the number of sides of cells with a mean value of six was found in a variety of proliferating epithelia. Previous studies have shown that clones of proliferating cells bounded by quiescent cells have fewer sides than normal epithelia. However,...
The topology of a power grid network is a piece of critical information for power grid operations. Different power grid topologies can change grid characteristics, inter-area oscillation modes, mode shapes, and even the robustness of the power system. This paper presents some preliminary study results, based on an approved WECC operating case and a modified low damping WECC system, to show the impact...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.