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Subbiah Bharathi, V.
- Similar Shaped Ancient Tamil Character Recognition Using Gradient Feature and Template Matching
Abstract Views :173 |
PDF Views:2
Authors
Affiliations
1 Sathyabama University, Chennai, IN
2 DMI College of Engineering, Chennai, IN
1 Sathyabama University, Chennai, IN
2 DMI College of Engineering, Chennai, IN
Source
Digital Image Processing, Vol 4, No 6 (2012), Pagination: 337-340Abstract
Recognition of similar shaped ancient Tamil character is a difficult problem and in character recognition system most of the errors occur from similar shaped characters. Researchers have used many methods of feature extraction for ancient Tamil character recognition. In this paper we proposed a novel feature extraction technique to improve the recognition results of two similar shaped ancient Tamil characters. In this work, we have taken the samples of offline ancient Tamil characters from six different centuries. The technique is based on F-ratio (Fisher Ratio), a statistical measure defined by the ratio between-class variance and within-class variance. F-ratio modifies the feature vector of two similar shape characters by weighting the feature elements. This weighting scheme enhances the feature elements that belongs to the distinguishable portions of the similar shaped characters and reduces the feature elements of the common portion of the characters, so that similar shaped characters can be identified easily. We considered pair of similar shape ancient characters of different stone inscriptions and we noted that f-ratio based feature weighting shows better recognition results. The proposed system achieves a maximum recognition accuracy of 94% using gradient features and template matching method.Keywords
Similar Shape Ancient Tamil Characters, Roberts Filter, F-Ratio.- A Novel Approach to Palmprint Classification using Orthogonal Moments
Abstract Views :161 |
PDF Views:3
Authors
Affiliations
1 Sathyabama University, Chennai, IN
2 DMI College of Engineering, Chennai, IN
1 Sathyabama University, Chennai, IN
2 DMI College of Engineering, Chennai, IN
Source
Digital Image Processing, Vol 3, No 16 (2011), Pagination: 1016-1019Abstract
Biometrics plays an important role in personal identification and it is becoming increasingly popular today. Palmprint matching is considered in this paper for effective identification of persons. Palmprint matching is performed based on Zernike moments feature descriptors and the classification using Modified Adaboost classifiers. Since, Zernike moments have the property of geometrical invariance, they are superior in image representative capability. From the experimental results, it has been observed that Zernike moments achieve superior performance than the other well-known moments.
Keywords
Biometrics, Palmprint, Feature Extraction, Zernike Moments, Adaboost.- Interactive Image Retrieval using Genetic Algorithm and Orthogonal Moments
Abstract Views :149 |
PDF Views:3
Authors
Affiliations
1 Sathyabama University, IN
2 DMI College of Engineering, IN
1 Sathyabama University, IN
2 DMI College of Engineering, IN
Source
Digital Image Processing, Vol 3, No 15 (2011), Pagination: 968-971Abstract
Image Retrieval is a field of study concerned with searching and retrieving images from a collection of database. The user participation in image retrieval system gains attention in the recent research in order to reduce the impact of completely depending on discrimination power of image features. In this proposed work, interactive genetic algorithm is employed where user selects one of the retrieved images for the next stage of mutation. Moreover, dual Hahn moments employed in this work, which are orthogonal and rotation invariants are effective image descriptors. Experiments were carried out on COREL images and the average retrieval rate of 88% reveals the efficacy of the proposed work.Keywords
Moment Features, Image Retrieval, Genetic Algorithm.- Image Retrieval using Discrete Orthogonal Moments in a Non Uniform Lattice
Abstract Views :138 |
PDF Views:3
Authors
Affiliations
1 Sathyabama University, IN
2 DMI College of Engineering, IN
1 Sathyabama University, IN
2 DMI College of Engineering, IN