| Records |
| Author |
Juan Ramon Terven Salinas; Joaquin Salas; Bogdan Raducanu |
| Title |
New Opportunities for Computer Vision-Based Assistive Technology Systems for the Visually Impaired |
Type |
Journal Article |
| Year |
2014 |
Publication |
Computer |
Abbreviated Journal |
COMP |
| Volume |
47 |
Issue |
4 |
Pages |
52-58 |
Keywords  |
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| Abstract |
Computing advances and increased smartphone use gives technology system designers greater flexibility in exploiting computer vision to support visually impaired users. Understanding these users' needs will certainly provide insight for the development of improved usability of computing devices. |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
0018-9162 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
OR;MV |
Approved |
no |
| Call Number |
Admin @ si @ TSR2014a |
Serial |
2317 |
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| Author |
Dimosthenis Karatzas; Faisal Shafait; Seiichi Uchida; Masakazu Iwamura; Lluis Gomez; Sergi Robles; Joan Mas; David Fernandez; Jon Almazan; Lluis Pere de las Heras |
| Title |
ICDAR 2013 Robust Reading Competition |
Type |
Conference Article |
| Year |
2013 |
Publication |
12th International Conference on Document Analysis and Recognition |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
1484-1493 |
| Keywords |
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| Abstract |
This report presents the final results of the ICDAR 2013 Robust Reading Competition. The competition is structured in three Challenges addressing text extraction in different application domains, namely born-digital images, real scene images and real-scene videos. The Challenges are organised around specific tasks covering text localisation, text segmentation and word recognition. The competition took place in the first quarter of 2013, and received a total of 42 submissions over the different tasks offered. This report describes the datasets and ground truth specification, details the performance evaluation protocols used and presents the final results along with a brief summary of the participating methods. |
| Address |
Washington; USA; August 2013 |
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Edition |
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| ISSN |
1520-5363 |
ISBN |
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Expedition |
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Conference |
ICDAR |
| Notes |
DAG; 600.056 |
Approved |
no |
| Call Number |
Admin @ si @ KSU2013 |
Serial |
2318 |
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| Author |
Lluis Gomez |
| Title |
Perceptual Organization for Text Extraction in Natural Scenes |
Type |
Report |
| Year |
2012 |
Publication |
CVC Technical Report |
Abbreviated Journal |
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| Volume |
173 |
Issue |
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Pages |
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| Keywords |
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| Abstract |
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| Address |
Bellaterra |
| Corporate Author |
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Thesis |
Master's thesis |
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Expedition |
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| Notes |
DAG |
Approved |
no |
| Call Number |
Admin @ si @ Gom2012 |
Serial |
2309 |
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| Author |
Lluis Gomez; Dimosthenis Karatzas |
| Title |
Multi-script Text Extraction from Natural Scenes |
Type |
Conference Article |
| Year |
2013 |
Publication |
12th International Conference on Document Analysis and Recognition |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
467-471 |
| Keywords |
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| Abstract |
Scene text extraction methodologies are usually based in classification of individual regions or patches, using a priori knowledge for a given script or language. Human perception of text, on the other hand, is based on perceptual organisation through which text emerges as a perceptually significant group of atomic objects. Therefore humans are able to detect text even in languages and scripts never seen before. In this paper, we argue that the text extraction problem could be posed as the detection of meaningful groups of regions. We present a method built around a perceptual organisation framework that exploits collaboration of proximity and similarity laws to create text-group hypotheses. Experiments demonstrate that our algorithm is competitive with state of the art approaches on a standard dataset covering text in variable orientations and two languages. |
| Address |
Washington; USA; August 2013 |
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Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1520-5363 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
ICDAR |
| Notes |
DAG; 600.056; 601.158; 601.197 |
Approved |
no |
| Call Number |
Admin @ si @ GoK2013 |
Serial |
2310 |
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| Author |
Fadi Dornaika; Alireza Bosaghzadeh; Bogdan Raducanu |
| Title |
Efficient Graph Construction for Label Propagation based Multi-observation Face Recognition |
Type |
Conference Article |
| Year |
2013 |
Publication |
Human Behavior Understanding 4th International Workshop |
Abbreviated Journal |
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| Volume |
8212 |
Issue |
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Pages |
124-135 |
| Keywords |
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| Abstract |
Workshop on Human Behavior Understanding
Human-machine interaction is a hot topic nowadays in the communities of multimedia and computer vision. In this context, face recognition algorithms (used as primary cue for a person’s identity assessment) work well under controlled conditions but degrade significantly when tested in real-world environments. Recently, graph-based label propagation for multi-observation face recognition was proposed. However, the associated graphs were constructed in an ad-hoc manner (e.g., using the KNN graph) that cannot adapt optimally to the data. In this paper, we propose a novel approach for efficient and adaptive graph construction that can be used for multi-observation face recognition as well as for other recognition problems. Experimental results performed on Honda video face database, show a distinct advantage of the proposed method over the standard graph construction methods. |
| Address |
Barcelona |
| Corporate Author |
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Thesis |
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| Publisher |
Springer International Publishing |
Place of Publication |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0302-9743 |
ISBN |
978-3-319-02713-5 |
Medium |
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| Area |
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Expedition |
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Conference |
HBU |
| Notes |
OR;MV |
Approved |
no |
| Call Number |
Admin @ si @ DBR2013 |
Serial |
2315 |
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| Author |
Bogdan Raducanu; Fadi Dornaika |
| Title |
Embedding new observations via sparse-coding for non-linear manifold learning |
Type |
Journal Article |
| Year |
2014 |
Publication |
Pattern Recognition |
Abbreviated Journal |
PR |
| Volume |
47 |
Issue |
1 |
Pages |
480-492 |
| Keywords |
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| Abstract |
Non-linear dimensionality reduction techniques are affected by two critical aspects: (i) the design of the adjacency graphs, and (ii) the embedding of new test data-the out-of-sample problem. For the first aspect, the proposed solutions, in general, were heuristically driven. For the second aspect, the difficulty resides in finding an accurate mapping that transfers unseen data samples into an existing manifold. Past works addressing these two aspects were heavily parametric in the sense that the optimal performance is only achieved for a suitable parameter choice that should be known in advance. In this paper, we demonstrate that the sparse representation theory not only serves for automatic graph construction as shown in recent works, but also represents an accurate alternative for out-of-sample embedding. Considering for a case study the Laplacian Eigenmaps, we applied our method to the face recognition problem. To evaluate the effectiveness of the proposed out-of-sample embedding, experiments are conducted using the K-nearest neighbor (KNN) and Kernel Support Vector Machines (KSVM) classifiers on six public face datasets. The experimental results show that the proposed model is able to achieve high categorization effectiveness as well as high consistency with non-linear embeddings/manifolds obtained in batch modes. |
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Expedition |
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Conference |
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| Notes |
OR;MV |
Approved |
no |
| Call Number |
Admin @ si @ RaD2013b |
Serial |
2316 |
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| Author |
Albert Gordo; Alicia Fornes; Ernest Valveny |
| Title |
Writer identification in handwritten musical scores with bags of notes |
Type |
Journal Article |
| Year |
2013 |
Publication |
Pattern Recognition |
Abbreviated Journal |
PR |
| Volume |
46 |
Issue |
5 |
Pages |
1337-1345 |
| Keywords |
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| Abstract |
Writer Identification is an important task for the automatic processing of documents. However, the identification of the writer in graphical documents is still challenging. In this work, we adapt the Bag of Visual Words framework to the task of writer identification in handwritten musical scores. A vanilla implementation of this method already performs comparably to the state-of-the-art. Furthermore, we analyze the effect of two improvements of the representation: a Bhattacharyya embedding, which improves the results at virtually no extra cost, and a Fisher Vector representation that very significantly improves the results at the cost of a more complex and costly representation. Experimental evaluation shows results more than 20 points above the state-of-the-art in a new, challenging dataset. |
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Place of Publication |
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Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0031-3203 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
DAG |
Approved |
no |
| Call Number |
Admin @ si @ GFV2013 |
Serial |
2307 |
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| Author |
David Fernandez; Simone Marinai; Josep Llados; Alicia Fornes |
| Title |
Contextual Word Spotting in Historical Manuscripts using Markov Logic Networks |
Type |
Conference Article |
| Year |
2013 |
Publication |
2nd International Workshop on Historical Document Imaging and Processing |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
36-43 |
| Keywords |
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| Abstract |
Natural languages can often be modelled by suitable grammars whose knowledge can improve the word spotting results. The implicit contextual information is even more useful when dealing with information that is intrinsically described as one collection of records. In this paper, we present one approach to word spotting which uses the contextual information of records to improve the results. The method relies on Markov Logic Networks to probabilistically model the relational organization of handwritten records. The performance has been evaluated on the Barcelona Marriages Dataset that contains structured handwritten records that summarize marriage information. |
| Address |
washington; USA; August 2013 |
| Corporate Author |
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Summary Language |
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Series Title |
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Series Issue |
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Edition |
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ISBN |
978-1-4503-2115-0 |
Medium |
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Expedition |
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Conference |
HIP |
| Notes |
DAG; 600.056; 600.045; 600.061; 602.006 |
Approved |
no |
| Call Number |
Admin @ si @ FML2013 |
Serial |
2308 |
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| Author |
A. M. Here; B. C. Lopez; Debora Gil; J. J. Camarero; Jordi Martinez-Vilalta |
| Title |
A new software to analyse wood anatomical features in conifer species |
Type |
Conference Article |
| Year |
2013 |
Publication |
International Symposium on Wood Structure in Plant Biology and Ecology |
Abbreviated Journal |
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Issue |
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Pages |
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| Abstract |
International Symposium on Wood Structure in Plant Biology and Ecology |
| Address |
Naples; Italy; March 2013 |
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Conference |
WSE |
| Notes |
IAM |
Approved |
no |
| Call Number |
Admin @ si @ HLG2013 |
Serial |
2303 |
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| Author |
Enric Marti; Ferran Poveda; Antoni Gurgui; Jaume Rocarias; Debora Gil |
| Title |
Una propuesta de seguimiento, tutorías on line y evaluación en la metodología de Aprendizaje Basado en Proyectos |
Type |
Miscellaneous |
| Year |
2013 |
Publication |
IV Congreso Internacional UNIVEST |
Abbreviated Journal |
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Issue |
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Pages |
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| Abstract |
Poster |
| Address |
Girona |
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Conference |
UNIVEST |
| Notes |
IAM |
Approved |
no |
| Call Number |
Admin @ si @ MPG2013a |
Serial |
2304 |
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| Author |
Sergio Vera; Miguel Angel Gonzalez Ballester; Debora Gil |
| Title |
Volumetric Anatomical Parameterization and Meshing for Inter-patient Liver Coordinate System Deffinition |
Type |
Conference Article |
| Year |
2013 |
Publication |
16th International Conference on Medical Image Computing and Computer Assisted Intervention |
Abbreviated Journal |
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Issue |
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Pages |
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| Address |
Nagoya; Japan; September 2013 |
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Conference |
MICCAI |
| Notes |
IAM |
Approved |
no |
| Call Number |
Admin @ si @ VGG2013 |
Serial |
2301 |
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| Author |
Veronica Romero; Alicia Fornes; Nicolas Serrano; Joan Andreu Sanchez; A.H. Toselli; Volkmar Frinken; E. Vidal; Josep Llados |
| Title |
The ESPOSALLES database: An ancient marriage license corpus for off-line handwriting recognition |
Type |
Journal Article |
| Year |
2013 |
Publication |
Pattern Recognition |
Abbreviated Journal |
PR |
| Volume |
46 |
Issue |
6 |
Pages |
1658-1669 |
| Keywords |
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| Abstract |
Historical records of daily activities provide intriguing insights into the life of our ancestors, useful for demography studies and genealogical research. Automatic processing of historical documents, however, has mostly been focused on single works of literature and less on social records, which tend to have a distinct layout, structure, and vocabulary. Such information is usually collected by expert demographers that devote a lot of time to manually transcribe them. This paper presents a new database, compiled from a marriage license books collection, to support research in automatic handwriting recognition for historical documents containing social records. Marriage license books are documents that were used for centuries by ecclesiastical institutions to register marriage licenses. Books from this collection are handwritten and span nearly half a millennium until the beginning of the 20th century. In addition, a study is presented about the capability of state-of-the-art handwritten text recognition systems, when applied to the presented database. Baseline results are reported for reference in future studies. |
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Elsevier Science Inc. New York, NY, USA |
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0031-3203 |
ISBN |
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Conference |
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| Notes |
DAG; 600.045; 602.006; 605.203 |
Approved |
no |
| Call Number |
Admin @ si @ RFS2013 |
Serial |
2298 |
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| Author |
Hongxing Gao; Marçal Rusiñol; Dimosthenis Karatzas; Josep Llados; Tomokazu Sato; Masakazu Iwamura; Koichi Kise |
| Title |
Key-region detection for document images -applications to administrative document retrieval |
Type |
Conference Article |
| Year |
2013 |
Publication |
12th International Conference on Document Analysis and Recognition |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
230-234 |
| Keywords |
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| Abstract |
In this paper we argue that a key-region detector designed to take into account the special characteristics of document images can result in the detection of less and more meaningful key-regions. We propose a fast key-region detector able to capture aspects of the structural information of the document, and demonstrate its efficiency by comparing against standard detectors in an administrative document retrieval scenario. We show that using the proposed detector results to a smaller number of detected key-regions and higher performance without any drop in speed compared to standard state of the art detectors. |
| Address |
Washington; USA; August 2013 |
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Place of Publication |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
1520-5363 |
ISBN |
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Medium |
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Expedition |
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Conference |
ICDAR |
| Notes |
DAG; 600.056; 600.045 |
Approved |
no |
| Call Number |
Admin @ si @ GRK2013b |
Serial |
2293 |
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| Author |
Andreas Fischer; Ching Y. Suen; Volkmar Frinken; Kaspar Riesen; Horst Bunke |
| Title |
A Fast Matching Algorithm for Graph-Based Handwriting Recognition |
Type |
Conference Article |
| Year |
2013 |
Publication |
9th IAPR – TC15 Workshop on Graph-based Representation in Pattern Recognition |
Abbreviated Journal |
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| Volume |
7877 |
Issue |
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Pages |
194-203 |
| Keywords |
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| Abstract |
The recognition of unconstrained handwriting images is usually based on vectorial representation and statistical classification. Despite their high representational power, graphs are rarely used in this field due to a lack of efficient graph-based recognition methods. Recently, graph similarity features have been proposed to bridge the gap between structural representation and statistical classification by means of vector space embedding. This approach has shown a high performance in terms of accuracy but had shortcomings in terms of computational speed. The time complexity of the Hungarian algorithm that is used to approximate the edit distance between two handwriting graphs is demanding for a real-world scenario. In this paper, we propose a faster graph matching algorithm which is derived from the Hausdorff distance. On the historical Parzival database it is demonstrated that the proposed method achieves a speedup factor of 12.9 without significant loss in recognition accuracy. |
| Address |
Vienna; Austria; May 2013 |
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| Publisher |
Springer Berlin Heidelberg |
Place of Publication |
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Abbreviated Series Title |
LNCS |
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Series Issue |
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Edition |
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| ISSN |
0302-9743 |
ISBN |
978-3-642-38220-8 |
Medium |
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Expedition |
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Conference |
GBR |
| Notes |
DAG; 600.045; 605.203 |
Approved |
no |
| Call Number |
Admin @ si @ FSF2013 |
Serial |
2294 |
| Permanent link to this record |
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| Author |
Andreas Fischer; Volkmar Frinken; Horst Bunke; Ching Y. Suen |
| Title |
Improving HMM-Based Keyword Spotting with Character Language Models |
Type |
Conference Article |
| Year |
2013 |
Publication |
12th International Conference on Document Analysis and Recognition |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
506-510 |
| Keywords |
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| Abstract |
Facing high error rates and slow recognition speed for full text transcription of unconstrained handwriting images, keyword spotting is a promising alternative to locate specific search terms within scanned document images. We have previously proposed a learning-based method for keyword spotting using character hidden Markov models that showed a high performance when compared with traditional template image matching. In the lexicon-free approach pursued, only the text appearance was taken into account for recognition. In this paper, we integrate character n-gram language models into the spotting system in order to provide an additional language context. On the modern IAM database as well as the historical George Washington database, we demonstrate that character language models significantly improve the spotting performance. |
| Address |
Washington; USA; August 2013 |
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Place of Publication |
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Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1520-5363 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
ICDAR |
| Notes |
DAG; 600.045; 605.203 |
Approved |
no |
| Call Number |
Admin @ si @ FFB2013 |
Serial |
2295 |
| Permanent link to this record |
