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Browsing by Author "Kumaravel, P"

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Accuracy measurement for image retrieval system

Thabasu Kannan, S; Kumaravel, P (Vandana Publications, 2015-08)

During the past decades we have been observing a permanent increase in image data, leading to huge repositories. Content-based image retrieval (CBIR) methods have tried to improve the access to image data. To date, numerous ...
Assessing landslide susceptibility using Bayesian probability-based weight of evidence model

Sujatha, E. R; Kumaravel, P; Rajamanickam, V. G (Springer, 2014-02)

This study aims to demonstrate the application of a Bayesian probability-based weight of evidence model to map landslide susceptibility in the Tevankarai stream watershed, Kodaikkanal, India. Slope gradient, relief, aspect, ...
Determination of the choromospheric quiet network element area index and its variation during 2008 and 2011

Singh, J; Ravindra, B; Selvendran, R; Kumaravel, P; Priyal, M; Priya, T. G; Amareswari, K (Chinese Academy of Sciences, 2012-02)

Generally it has been considered that the plages and sunspots are the main contributors to the solar irradiance. There are small scale structures on the sun with intermediate magnetic fields that could also contribute ...
GIS based landslide susceptibility mapping of Tevankarai Ar sub-watershed, Kodaikkanal, India using binary logistic regression analysis

Sujatha, E. R; Kumaravel, P; Rajamanickam, V. G (Springer, 2011-08)

Landslide susceptibility mapping is the first step in regional hazard management as it helps to understand the spatial distribution of the probability of slope failure in an area. An attempt is made to map the landslide ...
Landslide susceptibility analysis using Probabilistic Certainty Factor Approach: A case study on Tevankarai stream watershed, India

Sujatha, E. R; Rajamanickam, G. V; Kumaravel, P (Indian Academy of Sciences, 2012-10)

This paper reports the use of a GIS based Probabilistic Certainty Factor method to assess the geo-environmental factors that contribute to landslide susceptibility in Tevankarai Ar sub-watershed, Kodaikkanal. Landslide ...
Landslide susceptibility analysis using probabilistic likelihood ratio model—a geospatial-based study

Sujatha, E. R; Rajamanickam, V; Kumaravel, P; Saranathan, E (Springer, 2013-02)

The crucial and difficult task in landslide susceptibility analysis is estimating the probability of occurrence of future landslides in a study area under a specific set of geomorphic and topographic conditions. This task ...
Landslide Susceptibility Mapping Using Remotely Sensed Data through Conditional Probability Analysis Using Seed Cell and Point Sampling Techniques

Sujatha, E. R; Kumaravel, P; Rajamanickam, V. G (Springer, 2012-12)

Rapid urbanization, intense infra-structure development and increased tourism related activities have resulted in the change of landscape of the Kodaikkanal town and its surrounding, a popular hill town in Tamilnadu, South ...
Revitalizing image retrieval: AI enhancement and metaheuristic algorithm adaptation

Kumaravel, P; Thabasu Kannan, S (European Alliance for Innovation (EAI), 2025-01-17)

INTRODUCTION: In recent years, development of digital technology has led to number of images, which can be stored in digital format. However, searching and retrieval of images in large image DB (Database) is a mammoth task. ...
Sunspot drawings at Kodaikanal Observatory: a representative results on hemispheric sunspot numbers and area measurements

Ravindra, B; Kumaravel, P; Selvendran, R; Samuel, Joyce; Kumar, P; Nancy Jassoria; Navneeth, R. S (Springer, 2020-01)

The importance of the periodicity in sunspot appearance was well recognized by the mid-19th century. Several observatories around the globe have made the record of sunspots in the form of drawings and preserved them safely ...
Transit of Venus on 2012 June 06: stray light estimation and restoration of Ca-K images of Twin Telescope from Kodaikanal Observatory

Prabhu, K; Rangarajan, K. E; Ravindra, B; Sankarasubramanian, K; Selvendran, R; Kumaravel, P (Astronomical Society of India, 2013-09)

Observations of the transit of Venus were made from the Kodaikanal Observatory on 2012 June 06 in Ca-K wavelengths. Only half of the event was visible from India. We utilized this unique opportunity to compute the contribution ...
Variations of the Ca II K line profile parameters with solar latitude and time observed from Kodaikanal Solar Observatory

Srinivasa, Apoorva; Sreedevi, Anu; Raju, K. P; Nagaraju, K; Singh, J; Karuppath, N; Devendran, P; Ramesh Kumar, T; Kumaravel, P (Oxford University Press on behalf of Royal Astronomical Society, 2025-08)

The Ca-K line profiles as functions of solar latitude and time were obtained through our observations from the Kodaikanal Solar Observatory using the solar tunnel telescope and spectrograph with a CCD detector. Observations ...

Browsing by Author "Kumaravel, P"

Browsing by Author "Kumaravel, P"

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