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Author ![]() |
Juan Andrade; T. Alejandra Vidal; A. Sanfeliu | ||||
Title | Stochastic state estimation for simultaneous localization and map building in mobile robotics | Type | Book Chapter | ||
Year | 2005 | Publication | Vedran Kordic, Aleksandar Lazinica, and Munir Merdan (Eds.), Cutting Edge Robotics, Advanced Robotic Systems Press, 3.3:223–242 | Abbreviated Journal | |
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Notes | Approved | no | |||
Call Number | Admin @ si @ AVS2005a | Serial | 565 | ||
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Author ![]() |
Juan Andrade; T. Alejandra Vidal; A. Sanfeliu | ||||
Title | Unscented transformation of vehicle states in SLAM | Type | Miscellaneous | ||
Year | 2005 | Publication | Proceedings of the IEEE International Conference on Robotics and Automation, 324–329 | Abbreviated Journal | |
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Address | Barcelona (Spain) | ||||
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Notes | Approved | no | |||
Call Number | Admin @ si @ AVS2005c | Serial | 591 | ||
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Author ![]() |
Juan Borrego-Carazo; Carles Sanchez; David Castells; Jordi Carrabina; Debora Gil | ||||
Title | BronchoPose: an analysis of data and model configuration for vision-based bronchoscopy pose estimation | Type | Journal Article | ||
Year | 2023 | Publication | Computer Methods and Programs in Biomedicine | Abbreviated Journal | CMPB |
Volume | 228 | Issue | Pages | 107241 | |
Keywords | Videobronchoscopy guiding; Deep learning; Architecture optimization; Datasets; Standardized evaluation framework; Pose estimation | ||||
Abstract | Vision-based bronchoscopy (VB) models require the registration of the virtual lung model with the frames from the video bronchoscopy to provide effective guidance during the biopsy. The registration can be achieved by either tracking the position and orientation of the bronchoscopy camera or by calibrating its deviation from the pose (position and orientation) simulated in the virtual lung model. Recent advances in neural networks and temporal image processing have provided new opportunities for guided bronchoscopy. However, such progress has been hindered by the lack of comparative experimental conditions.
In the present paper, we share a novel synthetic dataset allowing for a fair comparison of methods. Moreover, this paper investigates several neural network architectures for the learning of temporal information at different levels of subject personalization. In order to improve orientation measurement, we also present a standardized comparison framework and a novel metric for camera orientation learning. Results on the dataset show that the proposed metric and architectures, as well as the standardized conditions, provide notable improvements to current state-of-the-art camera pose estimation in video bronchoscopy. |
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Publisher | Elsevier | Place of Publication | Editor | ||
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Notes | IAM; | Approved | no | ||
Call Number | Admin @ si @ BSC2023 | Serial | 3702 | ||
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Author ![]() |
Juan Borrego-Carazo; Carles Sanchez; David Castells; Jordi Carrabina; Debora Gil | ||||
Title | A benchmark for the evaluation of computational methods for bronchoscopic navigation | Type | Journal Article | ||
Year | 2022 | Publication | International Journal of Computer Assisted Radiology and Surgery | Abbreviated Journal | IJCARS |
Volume | 17 | Issue | 1 | Pages | |
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Notes | IAM | Approved | no | ||
Call Number | Admin @ si @ BSC2022 | Serial | 3832 | ||
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Author ![]() |
Juan Diego Gomez | ||||
Title | Toward Robust Myocardial Blush Grade Estimation in Contrast Angiography | Type | Report | ||
Year | 2009 | Publication | CVC Technical Report | Abbreviated Journal | |
Volume | 134 | Issue | Pages | ||
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Corporate Author | Computer Vision Center | Thesis | Master's thesis | ||
Publisher | Place of Publication | Bellaterra, Barcelona | Editor | ||
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Notes | MILAB | Approved | no | ||
Call Number | Admin @ si @ Gom2009 | Serial | 2393 | ||
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Author ![]() |
Juan Ignacio Toledo | ||||
Title | Information Extraction from Heterogeneous Handwritten Documents | Type | Book Whole | ||
Year | 2019 | Publication | PhD Thesis, Universitat Autonoma de Barcelona-CVC | Abbreviated Journal | |
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Abstract | In this thesis we explore information Extraction from totally or partially handwritten documents. Basically we are dealing with two different application scenarios. The first scenario are modern highly structured documents like forms. In this kind of documents, the semantic information is encoded in different fields with a pre-defined location in the document, therefore, information extraction becomes roughly equivalent to transcription. The second application scenario are loosely structured totally handwritten documents, besides transcribing them, we need to assign a semantic label, from a set of known values to the handwritten words.
In both scenarios, transcription is an important part of the information extraction. For that reason in this thesis we present two methods based on Neural Networks, to transcribe handwritten text.In order to tackle the challenge of loosely structured documents, we have produced a benchmark, consisting of a dataset, a defined set of tasks and a metric, that was presented to the community as an international competition. Also, we propose different models based on Convolutional and Recurrent neural networks that are able to transcribe and assign different semantic labels to each handwritten words, that is, able to perform Information Extraction. |
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Address | July 2019 | ||||
Corporate Author | Thesis | Ph.D. thesis | |||
Publisher | Ediciones Graficas Rey | Place of Publication | Editor | Alicia Fornes;Josep Llados | |
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ISSN | ISBN | 978-84-948531-7-3 | Medium | ||
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Notes | DAG; 600.140; 600.121 | Approved | no | ||
Call Number | Admin @ si @ Tol2019 | Serial | 3389 | ||
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Author ![]() |
Juan Ignacio Toledo; Alicia Fornes; Jordi Cucurull; Josep Llados | ||||
Title | Election Tally Sheets Processing System | Type | Conference Article | ||
Year | 2016 | Publication | 12th IAPR Workshop on Document Analysis Systems | Abbreviated Journal | |
Volume | Issue | Pages | 364-368 | ||
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Abstract | In paper based elections, manual tallies at polling station level produce myriads of documents. These documents share a common form-like structure and a reduced vocabulary worldwide. On the other hand, each tally sheet is filled by a different writer and on different countries, different scripts are used. We present a complete document analysis system for electoral tally sheet processing combining state of the art techniques with a new handwriting recognition subprocess based on unsupervised feature discovery with Variational Autoencoders and sequence classification with BLSTM neural networks. The whole system is designed to be script independent and allows a fast and reliable results consolidation process with reduced operational cost. | ||||
Address | Santorini; Greece; April 2016 | ||||
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Area | Expedition | Conference | DAS | ||
Notes | DAG; 602.006; 600.061; 601.225; 600.077; 600.097 | Approved | no | ||
Call Number | TFC2016 | Serial | 2752 | ||
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Author ![]() |
Juan Ignacio Toledo; Jordi Cucurull; Jordi Puiggali; Alicia Fornes; Josep Llados | ||||
Title | Document Analysis Techniques for Automatic Electoral Document Processing: A Survey | Type | Conference Article | ||
Year | 2015 | Publication | E-Voting and Identity, Proceedings of 5th international conference, VoteID 2015 | Abbreviated Journal | |
Volume | Issue | Pages | 139-141 | ||
Keywords | Document image analysis; Computer vision; Paper ballots; Paper based elections; Optical scan; Tally | ||||
Abstract | In this paper, we will discuss the most common challenges in electoral document processing and study the different solutions from the document analysis community that can be applied in each case. We will cover Optical Mark Recognition techniques to detect voter selections in the Australian Ballot, handwritten number recognition for preferential elections and handwriting recognition for write-in areas. We will also propose some particular adjustments that can be made to those general techniques in the specific context of electoral documents. | ||||
Address | Bern; Switzerland; September 2015 | ||||
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Series Editor | Series Title | Abbreviated Series Title | LNCS | ||
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Area | Expedition | Conference | VoteID | ||
Notes | DAG; 600.061; 602.006; 600.077 | Approved | no | ||
Call Number | Admin @ si @ TCP2015 | Serial | 2641 | ||
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Author ![]() |
Juan Ignacio Toledo; Manuel Carbonell; Alicia Fornes; Josep Llados | ||||
Title | Information Extraction from Historical Handwritten Document Images with a Context-aware Neural Model | Type | Journal Article | ||
Year | 2019 | Publication | Pattern Recognition | Abbreviated Journal | PR |
Volume | 86 | Issue | Pages | 27-36 | |
Keywords | Document image analysis; Handwritten documents; Named entity recognition; Deep neural networks | ||||
Abstract | Many historical manuscripts that hold trustworthy memories of the past societies contain information organized in a structured layout (e.g. census, birth or marriage records). The precious information stored in these documents cannot be effectively used nor accessed without costly annotation efforts. The transcription driven by the semantic categories of words is crucial for the subsequent access. In this paper we describe an approach to extract information from structured historical handwritten text images and build a knowledge representation for the extraction of meaning out of historical data. The method extracts information, such as named entities, without the need of an intermediate transcription step, thanks to the incorporation of context information through language models. Our system has two variants, the first one is based on bigrams, whereas the second one is based on recurrent neural networks. Concretely, our second architecture integrates a Convolutional Neural Network to model visual information from word images together with a Bidirecitonal Long Short Term Memory network to model the relation among the words. This integrated sequential approach is able to extract more information than just the semantic category (e.g. a semantic category can be associated to a person in a record). Our system is generic, it deals with out-of-vocabulary words by design, and it can be applied to structured handwritten texts from different domains. The method has been validated with the ICDAR IEHHR competition protocol, outperforming the existing approaches. | ||||
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Notes | DAG; 600.097; 601.311; 603.057; 600.084; 600.140; 600.121 | Approved | no | ||
Call Number | Admin @ si @ TCF2019 | Serial | 3166 | ||
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Author ![]() |
Juan Ignacio Toledo; Sebastian Sudholt; Alicia Fornes; Jordi Cucurull; A. Fink; Josep Llados | ||||
Title | Handwritten Word Image Categorization with Convolutional Neural Networks and Spatial Pyramid Pooling | Type | Conference Article | ||
Year | 2016 | Publication | Joint IAPR International Workshops on Statistical Techniques in Pattern Recognition (SPR) and Structural and Syntactic Pattern Recognition (SSPR) | Abbreviated Journal | |
Volume | 10029 | Issue | Pages | 543-552 | |
Keywords | Document image analysis; Word image categorization; Convolutional neural networks; Named entity detection | ||||
Abstract | The extraction of relevant information from historical document collections is one of the key steps in order to make these documents available for access and searches. The usual approach combines transcription and grammars in order to extract semantically meaningful entities. In this paper, we describe a new method to obtain word categories directly from non-preprocessed handwritten word images. The method can be used to directly extract information, being an alternative to the transcription. Thus it can be used as a first step in any kind of syntactical analysis. The approach is based on Convolutional Neural Networks with a Spatial Pyramid Pooling layer to deal with the different shapes of the input images. We performed the experiments on a historical marriage record dataset, obtaining promising results. | ||||
Address | Merida; Mexico; December 2016 | ||||
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Publisher | Springer International Publishing | Place of Publication | Editor | ||
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Series Editor | Series Title | Abbreviated Series Title | LNCS | ||
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ISSN | ISBN | 978-3-319-49054-0 | Medium | ||
Area | Expedition | Conference | S+SSPR | ||
Notes | DAG; 600.097; 602.006 | Approved | no | ||
Call Number | Admin @ si @ TSF2016 | Serial | 2877 | ||
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Author ![]() |
Juan Ignacio Toledo; Sounak Dey; Alicia Fornes; Josep Llados | ||||
Title | Handwriting Recognition by Attribute embedding and Recurrent Neural Networks | Type | Conference Article | ||
Year | 2017 | Publication | 14th International Conference on Document Analysis and Recognition | Abbreviated Journal | |
Volume | Issue | Pages | 1038-1043 | ||
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Abstract | Handwriting recognition consists in obtaining the transcription of a text image. Recent word spotting methods based on attribute embedding have shown good performance when recognizing words. However, they are holistic methods in the sense that they recognize the word as a whole (i.e. they find the closest word in the lexicon to the word image). Consequently,
these kinds of approaches are not able to deal with out of vocabulary words, which are common in historical manuscripts. Also, they cannot be extended to recognize text lines. In order to address these issues, in this paper we propose a handwriting recognition method that adapts the attribute embedding to sequence learning. Concretely, the method learns the attribute embedding of patches of word images with a convolutional neural network. Then, these embeddings are presented as a sequence to a recurrent neural network that produces the transcription. We obtain promising results even without the use of any kind of dictionary or language model |
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Area | Expedition | Conference | ICDAR | ||
Notes | DAG; 600.097; 601.225; 600.121 | Approved | no | ||
Call Number | Admin @ si @ TDF2017 | Serial | 3055 | ||
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Author ![]() |
Juan J. Villanueva | ||||
Title | Visualization, Imaging and Image Processing. | Type | Book Whole | ||
Year | 2002 | Publication | International Association of Science and Technology for Development. ACTA Press, | Abbreviated Journal | |
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ISSN | ISBN | 0–88986–354–3 | Medium | ||
Area | Expedition | Conference | IASTE | ||
Notes | Approved | no | |||
Call Number | ISE @ ise @ Vil2002 | Serial | 276 | ||
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Author ![]() |
Juan J. Villanueva | ||||
Title | Visualization, Imaging, and Image Processing, | Type | Book Whole | ||
Year | 2008 | Publication | Proceedings of the Eight IASTED International Conference | Abbreviated Journal | |
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Address | Palma de Mallorca (Spain) | ||||
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ISSN | ISBN | 978-0-88986-759-8 | Medium | ||
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Notes | Approved | no | |||
Call Number | ISE @ ise @ Vil2008 | Serial | 1003 | ||
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Author ![]() |
Juan J. Villanueva; Jordi Gonzalez; Javier Varona; Xavier Roca | ||||
Title | Aspaces: Action Spaces for Recognition and Synthesis of Human Actions. | Type | Miscellaneous | ||
Year | 2002 | Publication | II International Workshop Articulated Motion and Deformable Objects AMDO 2002. | Abbreviated Journal | |
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Address | Palma de Mallorca, Espanya | ||||
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Notes | ISE | Approved | no | ||
Call Number | ISE @ ise @ VGV2002 | Serial | 302 | ||
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Author ![]() |
Juan Jose Rubio; Takahiro Kashiwa; Teera Laiteerapong; Wenlong Deng; Kohei Nagai; Sergio Escalera; Kotaro Nakayama; Yutaka Matsuo; Helmut Prendinger | ||||
Title | Multi-class structural damage segmentation using fully convolutional networks | Type | Journal Article | ||
Year | 2019 | Publication | Computers in Industry | Abbreviated Journal | COMPUTIND |
Volume | 112 | Issue | Pages | 103121 | |
Keywords | Bridge damage detection; Deep learning; Semantic segmentation | ||||
Abstract | Structural Health Monitoring (SHM) has benefited from computer vision and more recently, Deep Learning approaches, to accurately estimate the state of deterioration of infrastructure. In our work, we test Fully Convolutional Networks (FCNs) with a dataset of deck areas of bridges for damage segmentation. We create a dataset for delamination and rebar exposure that has been collected from inspection records of bridges in Niigata Prefecture, Japan. The dataset consists of 734 images with three labels per image, which makes it the largest dataset of images of bridge deck damage. This data allows us to estimate the performance of our method based on regions of agreement, which emulates the uncertainty of in-field inspections. We demonstrate the practicality of FCNs to perform automated semantic segmentation of surface damages. Our model achieves a mean accuracy of 89.7% for delamination and 78.4% for rebar exposure, and a weighted F1 score of 81.9%. | ||||
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Notes | HuPBA; no proj | Approved | no | ||
Call Number | Admin @ si @ RKL2019 | Serial | 3315 | ||
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