G. Lavanya Devi

Work place: Dept of CS&SE, AU College of Engineering, Andhra University, Visakhapatnam, India

E-mail: lavanyadevig@yahoo.co.in


Research Interests: Pattern Recognition, Image Processing, Data Mining, Database Management System, Data Structures and Algorithms


Dr.G.Lavanya Devi is Assistant Professor of the Department of Computer Science & Systems Engineering, A.U. College of Engineering (A), Andhra University, Visakhapatnam, and Andhra Pradesh. She received the Young Engineer Award in 2011 from Institute of Engineers, India, Young Women Scientist in 2016 from the Institute of Bioinformatics & Computational Biology (IBCB), Visakhapatnam, India and Young Faculty Research Fellowship Award in 2018 from MietY, Government of India.  5 Ph.D.’s were awarded under her guidance. She coauthored more than 25 technical research papers in International Journals. She is a life member of IEEE, Computer Society of India. Her current research interests include Bioinformatics, Web mining, Data Analytics, Soft Computing and Deep Learning.

Author Articles
A Frame Work for Classification of Multi Class Medical Data based on Deep Learning and Naive Bayes Classification Model

By N. Ramesh G. Lavanya Devi K Srinivasa Rao

DOI: https://doi.org/10.5815/ijieeb.2020.01.05, Pub. Date: 8 Feb. 2020

From the past decade there has been drastic development and deployment of digital data stored in electronic health record (EHR). Initially, it is designed for getting patient general information and performing health care tasks like billing, but researchers focused on secondary and most important use of these data for various clinical applications. In this paper we used deep learning based clinical note multi-label multi class approach using GloVe model for feature extraction from text notes, Auto-Encoder for training based on model and Navie basian classification and we map those classes for multi- classes. And we perform experiments with python and we used libraries of keras, tensor flow, numpy, matplotlib and we use MIMIC-III data set. And we made comparison with existing works CNN, skip-gram, n-gram and bag-of words. The performance results shows that proposed frame work performed good while classifying the text notes.

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Air Quality Prediction in Visakhapatnam with LSTM based Recurrent Neural Networks

By K Srinivasa Rao G. Lavanya Devi N. Ramesh

DOI: https://doi.org/10.5815/ijisa.2019.02.03, Pub. Date: 8 Feb. 2019

The research activity considered in this paper concerns about efficient approach for modeling and prediction of air quality. Poor air quality is an environmental hazard that has become a great challenge across the globe. Therefore, ambient air quality assessment and prediction has become a significant area of study. In general, air quality refers to quantification of pollution free air in a particular location. It is determined by measuring different types of pollution indicators in the atmosphere. Traditional approaches depend on numerical methods to estimate the air pollutant concentration and require lots of computing power. Moreover, these methods cannot draw insights from the abundant data available. To address this issue, the proposed study puts forward a deep learning approach for quantification and prediction of ambient air quality. Recurrent neural networks (RNN) based framework with special structured memory cells known as Long Short Term Memory (LSTM) is proposed to capture the dependencies in various pollutants and to perform air quality prediction. Real time dataset of the city Visakhapatnam having a record of 12 pollutants was considered for the study. Modeling of temporal sequence data of each pollutant was performed for forecasting hourly based concentrations. Experimental results show that proposed RNN-LSTM frame work attained higher accuracy in estimating hourly based air ambience. Further, this model may be enhanced by adopting bidirectional mechanism in recurrent layer.

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A New Robust and Imperceptible Image Watermarking Scheme Based on Hybrid Transform and PSO

By Tamirat Tagesse Takore P. Rajesh Kumar G. Lavanya Devi

DOI: https://doi.org/10.5815/ijisa.2018.11.06, Pub. Date: 8 Nov. 2018

In this paper, a new robust and imperceptible digital image watermarking scheme that can overcome the limitation of traditional wavelet-based image watermarking schemes is proposed using hybrid transforms viz. Lifting wavelet transform (LWT), discrete cosine transform (DCT) and singular value decomposition (SVD). The scheme uses canny edge detector to select blocks with higher edge pixels. Two reference sub-images, which are used as the point of reference for watermark embedding and extraction, have been formed from selected blocks based on the number of edges. To achieve a better trade-off between imperceptibility and robustness, multiple scaling factors (MSF) have been employed to modulate different ranges of singular value coefficients during watermark embedding process. Particle swarm optimization (PSO) algorithm has been adopted to obtain optimized MSF. The performance of the proposed scheme has been assessed under different conditions and the experimental results, which are obtained from computer simulation, verifies that the proposed scheme achieves enhanced robustness against various attacks performed. Moreover, the performance of the proposed scheme is compared with the other existing schemes and the results of comparison confirm that our proposed scheme outperforms previous existing schemes in terms of robustness and imperceptibility.

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Robust Image Watermarking Scheme Using Population-Based Stochastic Optimization Technique

By Tamirat Tagesse Takore P. Rajesh Kumar G. Lavanya Devi

DOI: https://doi.org/10.5815/ijigsp.2017.07.06, Pub. Date: 8 Jul. 2017

Designing an efficient watermarking scheme that can achieve better robustness with limited visual quality distortion is the most challenging problem. In this paper, robust digital image watermarking scheme based on edge detection and singular value decomposition (SVD) is proposed. Two sub-images, which are used as a point of reference for both watermark embedding and extracting, are formed from blocks that are selected based on the number of edges they have. Block based SVD is performed on sub-images to embed a binary watermark by modifying the singular value (S). A population-based stochastic optimization technique is employed to achieve enhanced performance by searching embedding parameters which can maintain a better trade-off between robustness and imperceptibility. The experimental results show that the proposed method achieves improved robustness against different image processing and geometric attacks for selected quality threshold. The performance of the proposed scheme is compared with the existing schemes and significant improvement is observed.

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