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A novel two-stage algorithm for constructing the orthogonal concavity tree (OCT) of a digital object is proposed. In Stage I, it derives the minimum-area orthogonal cover of the object. In Stage II, it constructs the orthogonal hull from the ortho-cover, and while doing so, extracts the orthogonal concavities in an iterative manner. Nested concavities, if any, are obtained by considering each concavity...
A novel approach towards word segmentation and baseline detection in a handwritten document is proposed. It is based on certain structural properties of isothetic covers tightly enclosing the words in a handwritten document. For an appropriate grid size, the isothetic covers successfully segregates the words so that each cover corresponds to a particular word. By analyzing the horizontal chords of...
Data clustering is one of the powerful techniques for the knowledge discovery from data. In this paper, a novel approach for hierarchical clustering has been proposed over non-binary search space. Besides the agglomerative methods, the proposed algorithm has considered the Strength of Presence associated with each transaction, to yield quality clusters which are again more close to the real life situation...
Association rule induction is a powerful data mining method, used to analyze the regularities in data trends by finding the frequent itemset and association between items or set of items. Several research attempts have been done for the purpose based on the binary data space. In this paper an algorithm has been proposed for the same purpose but based on the non-binary data space. The algorithm is...
Point symmetry-based clustering is an important unsupervised learning tool for recognizing symmetrical convex or non-convex shaped clusters, even in the microarray datasets. To enable fast clustering of this large data, in this article, a distributed space and time-efficient scalable parallel approach for point symmetry-based K-means algorithm has been proposed. A natural basis for analyzing gene...
In this paper a masking based data hiding and image authentication technique (MDHIAT) has been proposed by embedding a message/image into a colour image. Bits from authenticating message/image are embedded in single bit position under each byte of the source image by choosing a standard 3 times 3 mask in row major order. Point of insertion of a bit is obtained by computing modulus operation of the...
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