Qualification: 
M.E
Email: 
v_kamalaveni@cb.amrita.edu

Kamalaveni V. currently serves as Assistant Professor at Department of Computer Science and Engineering, School of Engineering, Coimbatore Campus. Her areas of research include Database Systems and Network Security.

Publications

Publication Type: Journal Article

Year of Publication Publication Type Title

2017

Journal Article

Kamalaveni V., S. Veni, and A., N. Kutty K., “Improved self-snake based anisotropic diffusion model for edge preserving image denoising using structure tensor”, Multimedia Tools and Applications, pp. 1-32, 2017.[Abstract]


The performance of classifier algorithms used for predictive analytics highly dependent on quality of training data. This requirement demands the need for noise free data or images. The existing partial differential equation based diffusion models can remove noise present in an image but lacking in preserving thin lines, fine details and sharp corners. The classifier algorithms can able to make correct judgement to which class the image belongs to only if all edges are preserved properly during denoising process. To satisfy this requirement the authors proposed a new improved partial differential equation based diffusion algorithm for edge preserving image denoising. The proposed new anisotropic diffusion algorithm is an extension of self-snake diffusion filter which estimates edge and gradient directions as eigenvectors of a structure tensor matrix. The unique feature of this proposed anisotropic diffusion algorithm is diffusion rate at various parts of an image matches with the speed of level set flow. In the proposed algorithm an efficient edge indicator function dependent on the trace of the structure tensor matrix is used. The proposed model performs best in preserving thin lines, sharp corners and fine details since diffusion happens only along edges and diffusion is totally stopped across edges in this model. The additional edge-stopping term which is a vector dot product of derivative of an edge stopping function and derivative of an image computed along gradient and edge orthogonal directions is used in this model as shock filter which enables increased sharpness at all discontinuities. The performance of proposed diffusion algorithm is compared with other classical diffusion filters like conventional perona-malik diffusion, conventional self-snake diffusion methods. © 2017 Springer Science+Business Media New York

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2016

Journal Article

Kamalaveni V., Narayanankutty, K. Ab, and Veni, Sc, “Performance comparison of total variation based image regularization algorithms”, International Journal on Advanced Science, Engineering and Information Technology, vol. 6, pp. 419-425, 2016.[Abstract]


The mathematical approach calculus of variation is commonly used to find an unknown function that minimizes or maximizes the functional. Retrieving the original image from the degraded one, such problems are called inverse problems. The most basic example for inverse problem is image denoising. Variational methods are formulated as optimization problems and provides a good solution to image denoising. Three such variational methods Tikhonov model, ROF model and Total Variation-L1 model for image denoising are studied and implemented. Performance of these variational algorithms are analyzed for different values of regularization parameter. It is found that small value of regularization parameter causes better noise removal whereas large value of regularization parameter preserves well sharp edges. The Euler's Lagrangian equation corresponding to an energy functional used in variational methods is solved using gradient descent method and the resulting partial differential equation is solved using Euler's forward finite difference method. The quality metrics are computed and the results are compared in this paper. More »»

Faculty Research Interest: 
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