Browsing PhD Theses by Title
Now showing items 56-73 of 73
-
On curve reconstruction in Riemannian Manifolds: ordering motion frames
(Dhirubhai Ambani Institute of Information and Communication Technology, 2012)In this work we generalize the computational geometric curve reconstruction approach to curves embedded in Riemannian manifolds. We prove that the minimum spanning tree, given a sufficiently dense sample, correctly ... -
On designing DNA codes and their applications
(Dhirubhai Ambani Institute of Information and Communication Technology, 2019)Bio-computing uses the complexes of biomolecules such as DNA (Deoxyribonucleic acid), RNA (Ribonucleic acid) and proteins to perform the computational processes for encoding and processing the data. In 1994, L. Adleman ... -
On heterogeneous distributed storage systems: bounds and code constructions
(Dhirubhai Ambani Institute of Information and Communication Technology, 2019)In Distributed Storage Systems (DSSs), usually, data is stored using encoded packets on different chunk servers. In this thesis, we have considered heterogeneous DSSs in which each node may store a different number of ... -
On large scale near-independent blind source separation
(Dhirubhai Ambani Institute of Information and Communication Technology, 2015)The thesis addresses Blind Source Separation (BSS) in Large Scale (LS) and near-Independent (nI) sources scenario. The large scale in BSS imply number of unknown sources ranging from 15 to 140, so that the corresponding ... -
Peer-to-peer communication in mobile social network
(Dhirubhai Ambani Institute of Information and Communication Technology, 2016)Peer-to-peer opportunistic communication between mobile devices carried by humanswithout using any infrastructure is largely unexploited. As these devices are carried byhumans, their encounter pattern depends on human ... -
Privacy and accountability in cloud computation and storage
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)Cloud computing is a cost-effective computing paradigm for convenient, ondemand data access to a shared pool of configurable computing resources such as networks, servers, storage, applications, and services. While providing ... -
Secure and efficient dealing with node capture attack in wireless sensor networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2017)Wireless Sensor Networks (WSN) have found enormous applications in various areas of day-to-day life such as in health-care, battle-field surveillance and disaster management. The communication amongst the sensor nodes ... -
Set labelling vertices and study of auxiliary graphs
(Dhirubhai Ambani Institute of Information and Communication Technology, 2018)Given a set of nonempty subsets of some universal set, their intersection graph is defined as the graph with one vertex for each set and two vertices are adjacent precisely when their representing sets have non-empty ... -
Signal processing methods for robust heart rate estimation from multimodal physiological signals
(Dhirubhai Ambani Institute of Information and Communication Technology, 2017)Cardiovascular diseases are the major cause of world-wide mortality. Heart rate (HR) and heart rate variability (HRV) are important health parameters to monitor functioning of heart of cardiac patients. Multimodal physiological ... -
Similarity preserving dimensionality reduction for image data
(Dhirubhai Ambani Institute of Information and Communication Technology, 2016)Data collection and storage capabilities have increased manifold in last few decades,leading to information overload. Number of variables used to represent each data observation is called dimension of the data and dealing ... -
Some new methods for multi-resolution image fusion
(Dhirubhai Ambani Institute of Information and Communication Technology, 2016)It is always an interest of a mankind to explore the various resources of the earth such as minerals, agriculture, forestry, geology, ocean etc., Before the invention of the remote sensing, in order to analyze the various ... -
Spatial and spectral regularization in unmixing of remotely sensed data
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)The hyperspectral imaging opens the broad possibilities for remote sensing data analysis with it’s rich spectral information. However, this has a trade-off with limited spatial details due to the presence of several hardware ... -
Spectrum sensing for cognitive radio
(Dhirubhai Ambani Institute of Information and Communication Technology, 2019)Due to the rapid growth of new wireless communication services and applications, need for radio frequency (RF) spectrum is continuously increasing. Most of the available RF spectrum is already been licensed to the existing ... -
Techniques for denoising brain magnetic resonance images
(Dhirubhai Ambani Institute of Information and Communication Technology, 2016)Advances in the computational science joined medical imaging domain to help humanity. It offers great support in clinical practices where automatic Computer Added Systems (CAD) help in identification and localization of ... -
Variants of orthogonal neighborhood preserving projections for image recognition
(Dhirubhai Ambani Institute of Information and Communication Technology, 2018)With the increase in the resolution of image capturing sensors and data storagecapacity, a huge increase in image data is seen in past decades. This informationupsurge has created a huge challenge for machines to perform ... -
Vector graph representation for 3D meshes and algorithms for mesh deformation, enveloping, interpolation and morphing
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)The performance of the tools developed for graphics and animation depends on the underlying representation of the geometric model of the objects. The geometric model in turn describes the geometry of the real world object. ... -
Voice conversion: alignment and mapping perspective
(Dhirubhai Ambani Institute of Information and Communication Technology, 2019)Understanding how a particular speaker is producing speech, and mimicking one's voice is a difficult research problem due to the sophisticated mechanism involved in speech production. Voice Conversion (VC) is a technique ... -
Wavelets and filter banks: novel approaches for real and complex-valued transform designs
(Dhirubhai Ambani Institute of Information and Communication Technology, 2017)Processing of natural images stored as 2-D discrete signals is an inevitable task in almost all areas of image processing. In order to have the desired processing results, directional image representation can be considered ...