258 research outputs found
Offline Text-Independent Writer Identification based on word level data
This paper proposes a novel scheme to identify the authorship of a document
based on handwritten input word images of an individual. Our approach is
text-independent and does not place any restrictions on the size of the input
word images under consideration. To begin with, we employ the SIFT algorithm to
extract multiple key points at various levels of abstraction (comprising
allograph, character, or combination of characters). These key points are then
passed through a trained CNN network to generate feature maps corresponding to
a convolution layer. However, owing to the scale corresponding to the SIFT key
points, the size of a generated feature map may differ. As an alleviation to
this issue, the histogram of gradients is applied on the feature map to produce
a fixed representation. Typically, in a CNN, the number of filters of each
convolution block increase depending on the depth of the network. Thus,
extracting histogram features for each of the convolution feature map increase
the dimension as well as the computational load. To address this aspect, we use
an entropy-based method to learn the weights of the feature maps of a
particular CNN layer during the training phase of our algorithm. The efficacy
of our proposed system has been demonstrated on two publicly available
databases namely CVL and IAM. We empirically show that the results obtained are
promising when compared with previous works
Improving Accuracy and Explainability of Online Handwriting Recognition
Handwriting recognition technology allows recognizing a written text from a
given data. The recognition task can target letters, symbols, or words, and the
input data can be a digital image or recorded by various sensors. A wide range
of applications from signature verification to electronic document processing
can be realized by implementing efficient and accurate handwriting recognition
algorithms. Over the years, there has been an increasing interest in
experimenting with different types of technology to collect handwriting data,
create datasets, and develop algorithms to recognize characters and symbols.
More recently, the OnHW-chars dataset has been published that contains
multivariate time series data of the English alphabet collected using a
ballpoint pen fitted with sensors. The authors of OnHW-chars also provided some
baseline results through their machine learning (ML) and deep learning (DL)
classifiers.
In this paper, we develop handwriting recognition models on the OnHW-chars
dataset and improve the accuracy of previous models. More specifically, our ML
models provide - improvements over the previous ML models, and
our optimized DL models with ensemble learning provide -
improvements over the previous DL models. In addition to our accuracy
improvements over the spectrum, we aim to provide some level of explainability
for our models to provide more logic behind chosen methods and why the models
make sense for the data type in the dataset. Our results are verifiable and
reproducible via the provided public repository.Comment: 20 pages, 8 figures, 2 tables
Graphonomics and your Brain on Art, Creativity and Innovation : Proceedings of the 19th International Graphonomics Conference (IGS 2019 – Your Brain on Art)
[Italiano]: “Grafonomia e cervello su arte, creatività e innovazione”.
Un forum internazionale per discutere sui recenti progressi nell'interazione tra arti creative, neuroscienze, ingegneria, comunicazione, tecnologia, industria, istruzione, design, applicazioni forensi e mediche. I contributi hanno esaminato lo stato dell'arte, identificando sfide e opportunità , e hanno delineato le possibili linee di sviluppo di questo settore di ricerca. I temi affrontati includono: strategie integrate per la comprensione dei sistemi neurali, affettivi e cognitivi in ambienti realistici e complessi; individualità e differenziazione dal punto di vista neurale e comportamentale; neuroaesthetics (uso delle neuroscienze per spiegare e comprendere le esperienze estetiche a livello neurologico); creatività e innovazione; neuro-ingegneria e arte ispirata dal cervello, creatività e uso di dispositivi di mobile brain-body imaging (MoBI) indossabili; terapia basata su arte creativa; apprendimento informale; formazione; applicazioni forensi. / [English]: “Graphonomics and your brain on art, creativity and innovation”.
A single track, international forum for discussion on recent advances at the intersection of the creative arts, neuroscience, engineering, media, technology, industry, education, design, forensics, and medicine.
The contributions reviewed the state of the art, identified challenges and opportunities and created a roadmap for the field of graphonomics and your brain on art.
The topics addressed include: integrative strategies for understanding neural, affective and cognitive systems in realistic, complex environments; neural and behavioral individuality and variation; neuroaesthetics (the use of neuroscience to explain and understand the aesthetic experiences at the neurological level); creativity and innovation; neuroengineering and brain-inspired art, creative concepts and wearable mobile brain-body imaging (MoBI) designs; creative art therapy; informal learning; education; forensics
Fuzzy Logic Classification of Handwritten Signature Based Computer Access and File Encryption
Often times computer access and file encryption is successful based on how complex a password will be, how often users could change their complex password, the length of the complex password and how creative users are in creating a complex passsword to stand against unauthorized access to computer resources or files. This research proposes a new way of computer access and file encryption based on the fuzzy logic classification of handwritten signatures. Feature extraction of the handwritten signatures, the Fourier transformation algorithm and the k-Nearest Algorithm could be implemented to determine how close the signature is to the signature on file to grant or deny users access to computer resources and encrypted files. lternatively implementing fuzzy logic algorithms and fuzzy k-Nearest Neighbor algorithm to the captured signature could determine how close a signature is to the one on file to grant or deny access to computer resources and files. This research paper accomplishes the feature recognition firstly by extracting the features as users sign their signatures for storage, and secondly by determining the shortest distance between the signatures. On the other hand this research work accomplish the fuzzy logic recognition firstly by classifying the signature into a membership groups based on their degree of membership and secondly by determining what level of closeness the signatures are from each other. The signatures were collected from three selected input devices- the mouse, I-Pen and the IOGear. This research demonstrates which input device users found efficient and flexible to sign their respective names. The research work also demonstrates the security levels of implementing the fuzzy logic, fuzzy k-Nearest Neighbor, Fourier Transform.Master'sCollege of Arts and Sciences: Computer ScienceUniversity of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/117719/1/Kwarteng.pd
Advances in Character Recognition
This book presents advances in character recognition, and it consists of 12 chapters that cover wide range of topics on different aspects of character recognition. Hopefully, this book will serve as a reference source for academic research, for professionals working in the character recognition field and for all interested in the subject
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