Search Results for author: A. G. Ramakrishnan

Found 17 papers, 1 papers with code

Brain-scale Theta Band Functional Connectivity As A Signature of Slow Breathing and Breath-hold Phases

no code implementations15 Dec 2023 Anusha A. S., Pradeep Kumar G., A. G. Ramakrishnan

The study reported herein attempts to understand the neural mechanisms engaged in the conscious control of breathing and breath-hold.

EEG feature selection

A Classifier Using Global Character Level and Local Sub-unit Level Features for Hindi Online Handwritten Character Recognition

no code implementations26 Oct 2023 Anand Sharma, A. G. Ramakrishnan

Hindi character datasets used for training and testing the developed classifier consist of samples of handwritten characters from 96 different character classes.

Structural analysis of Hindi online handwritten characters for character recognition

no code implementations12 Oct 2023 Anand Sharma, A. G. Ramakrishnan

These properties are used to extract sub-units from Hindi ideal online characters.

Histograms of Points, Orientations, and Dynamics of Orientations Features for Hindi Online Handwritten Character Recognition

no code implementations5 Sep 2023 Anand Sharma, A. G. Ramakrishnan

The character datasets used for training and testing the classifiers consist of online handwritten samples of 96 different Hindi characters.

A Novel Deep Learning Architecture for Decoding Imagined Speech from EEG

no code implementations19 Mar 2020 Jerrin Thomas Panachakel, A. G. Ramakrishnan, T. V. Ananthapadmanabha

The recent advances in the field of deep learning have not been fully utilised for decoding imagined speech primarily because of the unavailability of sufficient training samples to train a deep network.

EEG

Decoding Imagined Speech using Wavelet Features and Deep Neural Networks

no code implementations19 Mar 2020 Jerrin Thomas Panachakel, A. G. Ramakrishnan

This paper proposes a novel approach that uses deep neural networks for classifying imagined speech, significantly increasing the classification accuracy.

Classification EEG +1

An Improved EEG Acquisition Protocol Facilitates Localized Neural Activation

no code implementations13 Mar 2020 Jerrin Thomas Panachakel, Nandagopal Netrakanti Vinayak, Maanvi Nunna, A. G. Ramakrishnan, Kanishka Sharma

This work proposes improvements in the electroencephalogram (EEG) recording protocols for motor imagery through the introduction of actual motor movement and/or somatosensory cues.

EEG Motor Imagery

Improving Facial Emotion Recognition Systems Using Gradient and Laplacian Images

no code implementations12 Feb 2019 Ram Krishna Pandey, Souvik Karmakar, A. G. Ramakrishnan, Nabagata Saha

These modifications help the network learn additional information from the gradient and Laplacian of the images.

Facial Emotion Recognition

MSCE: An edge preserving robust loss function for improving super-resolution algorithms

no code implementations25 Aug 2018 Ram Krishna Pandey, Nabagata Saha, Samarjit Karmakar, A. G. Ramakrishnan

With the recent advancement in the deep learning technologies such as CNNs and GANs, there is significant improvement in the quality of the images reconstructed by deep learning based super-resolution (SR) techniques.

SSIM Super-Resolution

Computationally Efficient Approaches for Image Style Transfer

no code implementations16 Jul 2018 Ram Krishna Pandey, Samarjit Karmakar, A. G. Ramakrishnan

In this work, we have investigated various style transfer approaches and (i) examined how the stylized reconstruction changes with the change of loss function and (ii) provided a computationally efficient solution for the same.

Style Transfer

Segmentation of Liver Lesions with Reduced Complexity Deep Models

no code implementations23 May 2018 Ram Krishna Pandey, Aswin Vasan, A. G. Ramakrishnan

We propose a computationally efficient architecture that learns to segment lesions from CT images of the liver.

Tumor Segmentation

A hybrid approach of interpolations and CNN to obtain super-resolution

no code implementations23 May 2018 Ram Krishna Pandey, A. G. Ramakrishnan

We propose a novel architecture that learns an end-to-end mapping function to improve the spatial resolution of the input natural images.

Image Super-Resolution

Language Independent Single Document Image Super-Resolution using CNN for improved recognition

no code implementations30 Jan 2017 Ram Krishna Pandey, A. G. Ramakrishnan

The problem involves quality improvement before passing it to a properly trained OCR to get accurate recognition of the text.

Image Enhancement Image Super-Resolution +1

Intrinsic normalization and extrinsic denormalization of formant data of vowels

no code implementations16 Sep 2016 T. V. Ananthapadmanabha, A. G. Ramakrishnan

Using a known speaker-intrinsic normalization procedure, formant data are scaled by the reciprocal of the geometric mean of the first three formant frequencies.

General Classification Vowel Classification

Significance of the levels of spectral valleys with application to front/back distinction of vowel sounds

no code implementations16 Jun 2015 T. V. Ananthapadmanabha, A. G. Ramakrishnan, Shubham Sharma

An objective critical distance (OCD) has been defined as that spacing between adjacent formants, when the level of the valley between them reaches the mean spectral level.

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