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- R. Gopikakumari
- 2013

Evaluation of images, after processing, is an important step for determining how well the images are being processed. Quality of image is usually assessed using image quality metrics. Unfortunately,â€¦ (More)

- V. S. Hari, V. P. Jagathy Raj, R. Gopikakumari
- Pattern Recognition
- 2013

The paper summarizes the design and implementation of a quadratic edge detection filter based on Volterra series. The filter is employed in an unsharp masking scheme for enhancing fingerprints in aâ€¦ (More)

- Rasel Chandra Roy, R. Gopikakumari
- 2004 International Conference on Signalâ€¦
- 2004

A new transform (MRT) for two-dimensional signal representation and some of its properties are proposed in this paper. The transform helps to do the frequency domain analysis of two-dimensionalâ€¦ (More)

- V. S. Hari, V. P. Jagathy Raj, R. Gopikakumari
- Pattern Analysis and Applications
- 2015

This paper describes the design and implementation of efficient edge detection quadratic filters for better localization of microaneurysms, caused by diabetic retinopathy, in fundus retinal images.â€¦ (More)

- V. Bindu, A. Unnikrishnan, R. Gopikakumari
- 2012 Annual IEEE India Conference (INDICON)
- 2012

The paper describes an Extended Kalman filter (EKF) algorithm for the estimation of rotor speed of a squirrel cage induction motor from the measured line currents. Estimated speed values are used forâ€¦ (More)

- Ruba Arockia Archana, A. Unnikrishnan, R. Gopikakumari, M. Rajesh
- 2011 IEEE Recent Advances in Intelligentâ€¦
- 2011

The identification of nonlinear systems with chaotic behavior using a neural network based computational algorithm is presented.. A neural network is trained on the measured output data of the actualâ€¦ (More)

â€“A novel method for generating the state space evolution of a nonlinear system from the output time series using the Recurrent Neural Network (RNN) model, trained with improved nonlinear Kalmanâ€¦ (More)

- V. Bhadran, Rasel Chandra Roy, R. Gopikakumari
- 2008 International Conference on Computingâ€¦
- 2008

Visualization techniques are of increasing importance in exploring and analyzing large amounts of multidimensional data. A new visualization technique for the computation of 2-D DFT in terms of 2â€¦ (More)

- V. L. Jaya, Preetha Basu, R. Gopikakumari
- 2012 Annual IEEE India Conference (INDICON)
- 2012

MRT is an alternate form of signal representation in the frequency domain, which makes use of operations in real domain only. UMRT is derived by removing the redundancies present in MRT and has theâ€¦ (More)

- Rajesh Cherian Roy, M. S. Anish Kumar, R. Gopikakumari
- 2007 9th International Symposium on Signalâ€¦
- 2007

M-dimensional real transform (MRT) is an alternate representation of a signal which is derived from the equation for computation of the discrete Fourier transform (DFT). The raw MRT representationâ€¦ (More)