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This paper presents a hybrid image coding scheme, based on shape primitives, termed Shape Primitive Extraction and Coding (SPEC). It is required that the compression algorithm should not only achieve high compression ratio, but also low complexity and high visual quality. The segmentation classifies image blocks into picture and text/graphics blocks by thresholding the number of colors of each block,...
Software testing is indispensable for all software development. As all mature engineering disciplines need to have systematic testing methodologies, software testing is a very important subject of software engineering. In software development practice, testing accounts for as much as 50% of total development efforts. Testing can be manual, automated, or a combination of both. Manual testing is the...
The vision of ubiquitous computing (UC) has been described in terms of the disappearing computers. To achieve this invisibility, the interactions between various objects of daily life should be as free as possible from explicit human administration. UC will enable the new breed of applications and systems resulting in to a smart world (SW) in which computational intelligence is distributed throughout...
Due to covert channel problem, traditional concurrency control protocols cannot be used in multilevel secure database system. Concurrency control protocol for multilevel secure database should ensure that transactions at lower security level are never delayed by higher security level transactions in the event of a data conflict. This may lead to the abortion or re- execution of high security level...
Discovery of efficient association rules has been found useful in many applications. However, without fully considering the importance and significance of items and transactions, it is noted that some discovered rules may be expired from users' interest. This paper proposes a novel technique to solve this problem. Utility measures play an important role in data mining, regardless of the kind of patterns...
Interval arithmetic provides an efficient method for monitoring and controlling errors in numerical calculations and can be used to solve problems that cannot be efficiently solved with floating-point arithmetic. However, existing software packages for interval arithmetic are often too slow for numerically intensive calculations. While conventional floating point arithmetic is provided by fast hardware,...
This paper presents a comparative analysis of three algorithms namely K-means, Particle swarm Optimization (PSO) and Self-Organizing PSO (SOPSO) for image clustering problems. The traditional K-means algorithm found to be trapped in local minima. However, PSO and SOPSO overcome the problem of local minima and provide better results. In this work gbest model is used in PSO and both West and gbest models...
Design of analog and mixed-signal circuits are often regarded as representing significant bottlenecks in system-on-chip (SOC) design. There are many challenges for mixed signal design to be adaptable for SOC implementation. The major considerations in designing these mixed signal circuits for the complete SOC are high speed, low power, and low voltage. This paper presents the design of an 8-bit flash...
The analysis of large datasets has become an important tool in understanding complex systems in areas such as economics, business, science and engineering. Such datasets are often collected geographically distributed way and cannot in practice be gathered in to a single repository. Applications that work with such datasets cannot control most aspects of the data's partitioning and arrangements. So...
Content based image retrieval aims at searching the image databases using non-textual information which are low level features like color, shape and texture. Medical image databases contain lot of textual or semantic information. This paper presents an approach by combining low level content features and high level semantic features to perform retrieval on medical image databases. The semantic information...
A novel and simple quality controlled ECG compression algorithm is proposed using Wavelet energy based diagnostic distortion (WEDD) measure, which localizes the error between the original and the reconstructed signals in the feature space. The compression algorithm is based on Wavelet transform, energy based thresholding and an adaptive quantization scheme. The quality control criterion allows clinically...
Space to store and time to retrieve objects in object relational databases (ORDBs) are the primary factors database designers and administrators are concerned with. The ontology of ORDB lists several storage units and most of them are represented as objects in relational data model for which reason ORDB is considered as complex. In this piece of work we have discussed on the conceptual storage of...
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