Autonomous Image-based Exploration for Mobile Robot Navigation (2009)
D Santosh, Supreeth Achar, C V Jawahar
Abstract — Image-based navigation paradigms have recently emerged as an interesting alternative to conventional modelbased methods in mobile robotics. In this paper, we augment the existing...
Class-Specific Kernel Selection for Verification Problems (2008)
The single-class verification framework is gaining increasing attention for problems involving authentication and retrieval. In this paper, nonlinear features are extracted using the kernel trick....
Constraints on Coplanar Moving Points (2008)
Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
Abstract. Configurations of dynamic points viewed by one or more cameras have not been studied much. In this paper, we present several view and time-independent constraints on different...
Dynamic Events as Mixtures of Spatial and Temporal Features (2008)
Karteek Alahari, C. V. Jawahar
Abstract. Dynamic events comprise of spatiotemporal atomic units. In this paper we model them using a mixture model. Events are represented using a framework based on the Mixture of Factor Analyzers...
Content-level Annotation of Large Collection of Printed Document Images (2008)
A large annotated corpus is critical to the development of robust optical character recognizers (OCRs). However, creation of annotated corpora is a tedious task. It is laborious, especially when the...
Optimizing Image and Camera Trajectories in Robot Vision Control using On-line Boosting (2008)
Abstract — In this paper, we present a novel boosted robot vision control algorithm. The method utilizes on-line boosting to produce a strong vision-based robot control starting from two weak...
Optical Character Recognition of Amharic Documents (2008)
Million Meshesha, C. V. Jawahar
Abstract — In Africa around 2,500 languages are spoken. Some of these languages have their own indigenous scripts. Accordingly, there is a bulk of printed documents available in libraries,...
On Using Classical Poetry Structure for Indian Language Post-Processing (2008)
Anoop M. Namboodiri, P. J. Narayanan, C. V. Jawahar
Post-processors are critical to the performance of language recognizers like OCRs, speech recognizers, etc. Dictionary-based post-processing commonly employ either an algorithmic approach or a...
Self Adaptable Recognizer for Document Image Collections (2008)
Million Meshesha, C. V. Jawahar
Abstract. This paper presents an architecture that enables the recognizer to learn incrementally and, thereby adapt to document image collections for performance improvement. We argue that the...
Text Driven Temporal Segmentation of Cricket Videos (2008)
Pramod Sankar K, Saurabh P, C. V. Jawahar
Abstract. In this paper we address the problem of temporal segmentation of videos. We present a multi-modal approach where clues from different information sources are merged to perform the...
Efficient Search in Document Image Collections (2008)
Abstract. This paper presents an efficient indexing and retrieval scheme for searching in document image databases. In many non-European languages, optical character recognizers are not very...
VIDEO FRAME ALIGNMENT IN MULTIPLE VIEWS ABSTRACT (2008)
Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
Many events are captured using multiple cameras today. Frames of each video stream have to be synchronized and aligned to a common time axis before processing them. Synchronization of the video...
Support Vector Machine based Hierarchical Classifiers for Large Class Problems (2008)
Tejo Krishna Chalasani, Anoop M. Namboodiri, C. V. Jawahar
One of the prime challenges in designing a classifier for large-class problems such as Indian language OCRs is the presence of a large similar looking character set. The nature of the character set...
Discriminative Actions for Recognising Events (2008)
Karteek Alahari, C. V. Jawahar
Abstract. This paper presents an approach to identify the importance of different parts of a video sequence from the recognition point of view. It builds on the observations that: (1) events consist...
Efficient Search with Changing Similarity Measures on Large Multimedia Datasets (2008)
Nataraj Jammalamadaka, Vikram Pudi, C. V. Jawahar
Abstract. In this paper, we consider the problem of finding the k most similar objects given a query object, in large multimedia datasets. We focus on scenarios where the similarity measure itself is...
Learning Segmentation of Documents with Complex Scripts (2008)
Anoop M. Namboodiri, C. V. Jawahar
Abstract. Most of the state-of-the-art segmentation algorithms are designed to handle complex document layouts and backgrounds, while assuming a simple script structure such as in Roman script. They...
Non-Rigid Motion Canceling (2008)
Abstract. The objective of our work is to develop vision strategies and algorithms for robotic manipulation tasks in domestic environments where there is ubiquitous presence of non-rigid objects....
Abstract The Digital Library of India Project: Process, Policies and Architecture (2008)
Vamshi Ambati, N. Balakrishnan, Raj Reddy, Lakshmi Pratha, C. V. Jawahar
In this paper we share the experience gained from establishing a process and a supporting architecture for the Digital Library of India (DLI) project. The DLI project was started with a vision of...
Cooperative CONDENSATION-based Recognition (2008)
Abstract. This report presents a new technique for visual matching of images for the purpose of object recognition and shape matching by employing a multi-hypothesis approach. The approach is based...
Dynamic Events as Mixtures of Spatial and Temporal Features (2008)
Karteek Alahari, C. V. Jawahar
Abstract. Dynamic events comprise of spatiotemporal atomic units. In this paper we model them using a mixture model. Events are represented using a framework based on the Mixture of Factor Analyzers...
Discriminative Actions for Recognising Events (2008)
Karteek Alahari, C. V. Jawahar
Abstract. This paper presents an approach to identify the importance of different parts of a video sequence from the recognition point of view. It builds on the observations that: (1) events consist...
Geometric And Stochastic Error Minimisation In Motion Tracking (2008)
Karteek Alahari Sujit, Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
Tracking has been considered to be a single view problem conventionally, where one is interested in the projections of a particular object in a view over time. Even if many views of the same event...
Searching in Document Images (2008)
C. V. Jawahar, Jawahar Million Meshesha, A. Balasubramanian
Searching in scanned documents is an important problem in Digital Libraries. If OCRs are not available, the scanned images are inaccessible. In this paper, we demonstrate a searching procedure...
Robust Visual Servoing based on Novel View Prediction (2008)
Abdul Hafez Piyush, Piyush Janawadkar, C. V. Jawahar
In this paper we propose a novel technique for robust visual servoing in presence of a large proportion of outliers in image measurements. The method employs robust statistical techniques and novel...
Learning to Segment Document Images (2008)
Sesh Kumar Anoop, Anoop Namboodiri, C. V. Jawahar, Centre Visual, Information Technology
A hierarchical framework for document segmentation is proposed as an optimization problem. The model incorporates the dependencies between various levels of the hierarchy unlike traditional document...
Constraints on Coplanar Moving Points (2008)
Sujit Kuthirummal Jawahar, C. V. Jawahar, P. J. Narayanan
Configurations of dynamic points in multiple views are interesting to study. In this paper, we present several view and timeindependent constraints on di#erent configurations of points moving on a...
Word-Level Access to Document Image Datasets (2008)
Jawahar Balasubramanian Million, C. V. Jawahar, A. Balasubramanian, Million Meshesha
This paper presents a novel approach for retrieval of relevant documents from a large collection of printed document images, where search in corresponding textual content is practically impossible...
Video Retrieval Based on Textual Queries (2008)
C. V. Jawahar, Jawahar Balakrishna Chennupati, Balamanohar Paluri, Nataraj Jammalamadaka
With the advancement of multimedia, digital video creation has become very common. There is enormous information present in the video, necessitating search techniques for specific content. In this...
Geometric And Stochastic Error Minimisation In Motion Tracking (2008)
Karteek Alahari Sujit, Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
Tracking has been considered to be a single view problem conventionally, where one is interested in the projections of a particular object in a view over time. Even if many views of the same event...
FRAME ALIGNMENT USING MULTIVIEW CONSTRAINTS (2007)
Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
suj it gdit., j awahar, pj n} i iit. net Capturing an event using multiple cameras is gaining popularity today. Simultaneously, constraints underlying multiview geometry are also being explored. The...
Synthesis of Online Handwriting in Indian Languages (2006)
Jawahar, C.V., Balasubramanian, A.
Synthesis of handwriting has a variety of applications including generation of personalized documents, study of writing styles, automatic generation of data for training recognizers, and matching of...
Synthesis of Online Handwriting in Indian Languages (2006)
Jawahar, C.V., Balasubramanian, A.
Synthesis of handwriting has a variety of applications including generation of personalized documents, study of writing styles, automatic generation of data for training recognizers, and matching of...
Model-Based Annotation of Online Handwritten Datasets (2006)
Kumar, Anand, Balasubramanian, A., Namboodiri, Anoop, Jawahar, C.V.
Annotated datasets of handwriting are a prerequisite to attempt a variety of problems such as building recognizers, developing writer identication algorithms, etc. However, the annotation of large...
Model-Based Annotation of Online Handwritten Datasets (2006)
Kumar, Anand, Balasubramanian, A., Namboodiri, Anoop, Jawahar, C.V.
Annotated datasets of handwriting are a prerequisite to attempt a variety of problems such as building recognizers, developing writer identication algorithms, etc. However, the annotation of large...
Model-Based Annotation of Online Handwritten Datasets (2006)
Kumar, Anand, Balasubramanian, A., Namboodiri, Anoop, Jawahar, C.V.
Annotated datasets of handwriting are a prerequisite to attempt a variety of problems such as building recognizers, developing writer identication algorithms, etc. However, the annotation of large...
Synthesis of Online Handwriting in Indian Languages (2006)
Jawahar, C.V., Balasubramanian, A.
Synthesis of handwriting has a variety of applications including generation of personalized documents, study of writing styles, automatic generation of data for training recognizers, and matching of...
Homography estimation from planar contours (2006)
Paresh Kumar Jain, C. V. Jawahar, Centre Visual, Information Technology
Homography estimation is an important step in many computer vision algorithms. Most existing algorithms estimate the homography from point or line correspondences which are difficult to reliably...
Textual Search in Graphics Stream of PDF (2006)
A. Balasubramanian, C. V. Jawahar
Digitized books and manuscripts in digital libraries are often stored as images or graphics. They are not searchable at the content level due to the lack of OCRs or poor quality of the scanned...
Digitizing a million books: Challenges for document analysis (2006)
K. Pramod Sankar, Vamshi Ambati, Lakshmi Pratha, C. V. Jawahar
Abstract. This paper describes the challenges for document image analysis community for building large digital libraries with diverse document...
A Semi-automatic Adaptive OCR for Digital Libraries (2006)
Sachin Rawat Sesh, Sachin Rawat, Million Meshesha, Indraneel Deb Sikdar, A. Balasubramanian, ...
This paper presents a novel approach for designing a semi-automatic adaptive OCR for large document image collections in digital libraries. We describe an interactive system for continuous...
Retrieval from Document Image Collections (2006)
A. Balasubramanian, Balasubramanian Million Meshesha, C. V. Jawahar
This paper presents a system for retrieval of relevant documents from large document image collections. We achieve e#ective search and retrieval from a large collection of printed document images by...
Robust homography-based control for camera positioning in piecewise planar environments (2006)
D. Santosh Kumar, C. V. Jawahar
Abstract. This paper presents a vision-based control for positioning a camera with respect to an unknown piecewise planar object. We introduce a novel homography-based approach that integrates...
A Survey of Planar Homography Estimation Techniques (2005)
Anubhav Agarwal, C. V. Jawahar, P. J. Narayanan
The estimation of the homography between two views is a key step in many applications involving multiple view geometry. The homography exists between two views between projections of points on a 3D...
Recognition of printed Amharic documents (2005)
Million Meshesha, C. V. Jawahar
In Africa, there are a number of languages with their own indigenous scripts. This paper presents an OCR for Amharic scripts. Amharic is the official and working language of Ethiopia. This is...
L. Jagannathan and C. V. Jawahar (2005)
Center For Visual, L. Jagannathan, C. V. Jawahar
In this paper we describe a prototype system that recognizes text in images, captured by camera phones and provide access to the content in a different language. Two Indian languages -- Hindi and...
Discrete contours in multiple views: Approximation and recognition (2004)
M. Pawan Kumar, Saurabh Goyal, Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
Recognition of discrete planar contours under similarity transformations has received a lot of attention but little work has been reported on recognizing them under more general transformations....
Planar Homography From Fourier Domain Representation (2004)
Pawan Kumar Sujit, M. Pawan Kumar, Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
Computing the transformation between two views of a planar scene is an important step in many computer vision applications. Spatial approaches to solve this problem need corresponding sets of...
Discrete contours in multiple views: approximation and recognition (2004)
Pawan Kumar Saurabh, M. Pawan Kumar, Saurabh Goyal, Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
Recognition of discrete planar contours under similarity transformations has received a lot of attention but little work has been reported on recognizing them under more general transformations....
Representation and Annotation of Online Handwritten Data (2004)
Ajay Bhaskarabhatla Sriganesh, Sriganesh Madhvanath, A. Balasubramanian, C. V. Jawahar
Annotated datasets of handwriting are a prerequisite for the design and training of handwriting recognition algorithms. In this paper, we briefly describe an XML representation for annotation of...
Tools for Developing OCRs for Indian Scripts (2003)
Pavan Kumar Ravikiran, S S Ravikiran, Abhishek Nayani, C V Jawahar, P J Narayanan
Development of OCRs for Indian script is an active area of activity today. Indian scripts present great challenges to an OCR designer due to the large number of letters in the alphabet, the...
A bilingual OCR for hindi-telugu documents (2002)
This paper describes the character recognition process from printed documents containing Hindi and Telugu text. Hindi and Telugu are among the most popular languages in India. The bilingual...
P.J.: Algebraic constraints on moving points in multiple views (2002)
Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
Multiview analysis of scenes includes the study of sceneindependent constraints satisfied by a configuration of cameras for all types of scenes as well as the study of viewindependent constraints...
P.J.: Algebraic constraints on moving points in multiple views (2002)
Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
Multiview analysis of scenes includes the study of sceneindependent constraints satisfied by a configuration of cameras for all types of scenes as well as the study of viewindependent constraints...
Polygonal Approximation of Closed Curves across Multiple Views (2002)
M. Pawan Kumar, Saurabh Goyal, C. V. Jawahar, Kumar Saurabh, P. J. Narayanan
Polygon approximation is an important step in the recognition of planar shapes. Traditional polygonal approximation algorithms handle only images that are related by a similarity transformation. The...
Algebraic Constraints on Moving Points in Multiple Views (2002)
Sujit Kuthirummal Jawahar, C. V. Jawahar, P. J. Narayanan
Multiview analysis of scenes includes the study of sceneindependent constraints satisfied by a configuration of cameras for all types of scenes as well as the study of viewindependent constraints...
A Bilingual OCR for Hindi-Telugu Documents and its Applications (2002)
Jawahar Pavan Kumar, C. V. Jawahar
This paper describes the character recognition process from printed documents containing Hindi and Telugu text. Hindi and Telugu are among the most popular languages in India. The bilingual...
Fourier domain representation of planar curves for recognition in (2002)
Sujit Kuthirummal, C. V. Jawahar, P. J. Narayanan
www.elsevier.com/locate/patcog
www.elsevier.com/locate/patcog Generalised correlation for multi-feature correspondence (2000)
C. V. Jawahar, P. J. Narayanan
Computing correspondences between pairs of images is fundamental to all structures from motion algorithms. Correlation is a popular method to estimate similarity between patches of images. In the...
Vamshi Ambati, Pramod Sankar, Lakshmi Pratha, C. V Jawahar
Digital Libraries have received wide attention in the recent years allowing access to digital information from anywhere across the world. They have become widely accepted and even preferred...