Aroor Dinesh Dileep

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Multiple kernel learning (MKL) approach for selecting and combining different representations of a data is presented. Selection of features from a representation of data using the MKL approach is also addressed. A base kernel function is used for each representation as well as for each feature from a representation. A new kernel is obtained as a linear(More)
Dynamic kernel (DK)-based support vector machines are used for the classification of varying length patterns. This paper explores the use of intermediate matching kernel (IMK) as a DK for classification of varying length patterns of long duration speech represented as sets of feature vectors. The main issue in construction of IMK is the choice for the set(More)
In this paper, we propose an approach for identification of encryption method for block ciphers using support vector machines. The task of identification of encryption method from cipher text only is considered as a document categorization task. We address the issues in representing a cipher text by a document vector. We consider the common dictionary based(More)
In this paper a sparse representation based feature is proposed for the tasks in speech recognition. Dictionary plays an important role in order to get a good sparse representation. Therefore instead of using a single over complete dictionary, multiple signal adaptive dictionaries are used. A novel principal component analysis (PCA) based method is proposed(More)
Text classification is an important task in managing huge repository of textual content prevailing in various domains. In this paper, we propose to use sparse representation classifier (SRC) and support vector machines (SVMs) based classifiers using frequency-based kernels for text classification. We consider term-frequency (TF) representation for a text(More)
Classification of varying length sequences using support vector machine (SVM) requires a suitable kernel that measures the similarity between a pair of sequences. In this paper we propose a novel approach to design a pyramid match kernel (PMK) using hidden Markov model. We study the performance of the SVM-based classifiers using the proposed PMK for(More)