| Records |
| Author |
Fernando Vilariño |
| Title |
A Machine Learning Approach for Intestinal Motility Assessment with Capsule Endoscopy |
Type |
Book Whole |
| Year |
2006 |
Publication |
PhD Thesis, Universitat Autonoma de Barcelona-CVC |
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| Abstract |
Intestinal motility assessment with video capsule endoscopy arises as a novel and challenging clinical fieldwork. This technique is based on the analysis of the patterns of intestinal contractions obtained by labelling all the motility events present in a video provided by a capsule with a wireless micro-camera, which is ingested by the patient. However, the visual analysis of these video sequences presents several im- portant drawbacks, mainly related to both the large amount of time needed for the visualization process, and the low prevalence of intestinal contractions in video.
In this work we propose a machine learning system to automatically detect the intestinal contractions in video capsule endoscopy, driving a very useful but not fea- sible clinical routine into a feasible clinical procedure. Our proposal is divided into two different parts: The first part tackles the problem of the automatic detection of phasic contractions in capsule endoscopy videos. Phasic contractions are dynamic events spanning about 4-5 seconds, which show visual patterns with a high variability. Our proposal is based on a sequential design which involves the analysis of textural, color and blob features with powerful classifiers such as SVM. This approach appears to cope with two basic aims: the reduction of the imbalance rate of the data set, and the modular construction of the system, which adds the capability of including domain knowledge as new stages in the cascade. The second part of the current work tackles the problem of the automatic detection of tonic contractions. Tonic contrac- tions manifest in capsule endoscopy as a sustained pattern of the folds and wrinkles of the intestine, which may be prolonged for an undetermined span of time. Our proposal is based on the analysis of the wrinkle patterns, presenting a comparative study of diverse features and classification methods, and providing a set of appro- priate descriptors for their characterization. We provide a detailed analysis of the performance achieved by our system both in a qualitative and a quantitative way. |
| Address |
CVC (UAB) |
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Thesis |
Ph.D. thesis |
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Editor |
Petia Radeva |
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84-933652-7-0 |
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800 |
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| Notes |
MV;SIAI |
Approved |
no |
| Call Number |
Admin @ si @ Vil2006; IAM @ iam @ Vil2006 |
Serial |
738 |
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| Author |
Albert Gordo; Florent Perronnin; Yunchao Gong; Svetlana Lazebnik |
| Title |
Asymmetric Distances for Binary Embeddings |
Type |
Journal Article |
| Year |
2014 |
Publication |
IEEE Transactions on Pattern Analysis and Machine Intelligence |
Abbreviated Journal |
TPAMI |
| Volume |
36 |
Issue |
1 |
Pages |
33-47 |
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| Abstract |
In large-scale query-by-example retrieval, embedding image signatures in a binary space offers two benefits: data compression and search efficiency. While most embedding algorithms binarize both query and database signatures, it has been noted that this is not strictly a requirement. Indeed, asymmetric schemes which binarize the database signatures but not the query still enjoy the same two benefits but may provide superior accuracy. In this work, we propose two general asymmetric distances which are applicable to a wide variety of embedding techniques including Locality Sensitive Hashing (LSH), Locality Sensitive Binary Codes (LSBC), Spectral Hashing (SH), PCA Embedding (PCAE), PCA Embedding with random rotations (PCAE-RR), and PCA Embedding with iterative quantization (PCAE-ITQ). We experiment on four public benchmarks containing up to 1M images and show that the proposed asymmetric distances consistently lead to large improvements over the symmetric Hamming distance for all binary embedding techniques. |
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0162-8828 |
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| Notes |
DAG; 600.045; 605.203; 600.077 |
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no |
| Call Number |
Admin @ si @ GPG2014 |
Serial |
2272 |
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| Author |
Karla Lizbeth Caballero; Joel Barajas; Oriol Pujol; J. Mauri; Petia Radeva |
| Title |
Using Radio Frequency Reconstructed IVUS Images in Tissue Classification |
Type |
Miscellaneous |
| Year |
2006 |
Publication |
Computers in Cardiology (CiC´06), 33: 533–536 |
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Valencia (Spain) |
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MILAB;HuPBA |
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no |
| Call Number |
BCNPCL @ bcnpcl @ CBP2006a |
Serial |
761 |
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| Author |
David Rotger; Petia Radeva; O. Rodriguez |
| Title |
Vessel Tortuosity Extraction from IVUS Images |
Type |
Miscellaneous |
| Year |
2006 |
Publication |
Computers in Cardiology (CiC´06), 33: 689–692 |
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Valencia (Spain) |
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| Notes |
MILAB |
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no |
| Call Number |
BCNPCL @ bcnpcl @ RRR2006 |
Serial |
762 |
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| Author |
Dani Rowe |
| Title |
Towards Robust Multiple-People Tracking in Unconstrained Environments |
Type |
Report |
| Year |
2007 |
Publication |
CVC Technical Report #100 |
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CVC (UAB) |
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Approved |
no |
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Admin @ si @ Row2007 |
Serial |
765 |
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| Author |
Josep Llados |
| Title |
Computer Vision: Progress of Research and Development |
Type |
Book Whole |
| Year |
2006 |
Publication |
1st CVC Internal Workshop Computer Vision: Progress of Research and Development, |
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J. Llados (ed.), |
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ISBN |
84-933652-8-9 |
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Conference |
CVCRD |
| Notes |
DAG |
Approved |
no |
| Call Number |
DAG @ dag @ Lla2006b |
Serial |
766 |
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| Author |
Ellen J.L. Brunenberg; Oriol Pujol; Bart M. Ter Haar Romeny; Petia Radeva |
| Title |
Automatic IVUS Segmentation of Atherosclerotic Plaque with Stop & Go Snake |
Type |
Miscellaneous |
| Year |
2006 |
Publication |
9th International Conference on Medical Image Computing and Computer–Assisted Intervention (MICCAI´06), 9–16 |
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Copenhagen (Denmark) |
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| Notes |
MILAB;HuPBA |
Approved |
no |
| Call Number |
BCNPCL @ bcnpcl @ BPT2006 |
Serial |
767 |
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| Author |
Joaquin Salas; P. Martinez; Jordi Gonzalez |
| Title |
Background Updating with the Use of Intrinsic Curves |
Type |
Book Chapter |
| Year |
2006 |
Publication |
International Conference on Image Analysis and Recognition (ICIAR´06), LNCS 4141 (A. Campilho et al., eds.), 1: 731–742, ISBN 978–3–540–44891–4 |
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no |
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ISE @ ise @ SMG2006 |
Serial |
768 |
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| Author |
Dani Rowe; I. Reid; Jordi Gonzalez; Juan J. Villanueva |
| Title |
Unconstrained Multiple-People Tracking |
Type |
Book Chapter |
| Year |
2006 |
Publication |
28th Annual Symposium of the German Association for Pattern Recognition, LNCS 4174: 505–514, ISBN 978–3–540–44412–1 |
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Berlin (Germany) |
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no |
| Call Number |
ISE @ ise @ RRG2006 |
Serial |
769 |
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| Author |
Ignasi Rius; J. Varona; Jordi Gonzalez; Juan J. Villanueva |
| Title |
Action Spaces for Efficient Bayesian Tracking of Human Motion |
Type |
Miscellaneous |
| Year |
2006 |
Publication |
International Conference on Pattern Recognition (ICPR´06), 1: 472–475 |
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Hong Kong (China) |
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no |
| Call Number |
ISE @ ise @ RVG2006 |
Serial |
770 |
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| Author |
F. Pla; Petia Radeva; Jordi Vitria |
| Title |
Pattern Recognition: Progress, Directions and Applications |
Type |
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| Year |
2006 |
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ISBN |
84-933652-6-2 |
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| Notes |
OR;MILAB;MV |
Approved |
no |
| Call Number |
BCNPCL @ bcnpcl @ PRV2006b |
Serial |
771 |
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| Author |
Francisco Javier Orozco; F.A. Garcia; J.L. Arcos; Jordi Gonzalez |
| Title |
Spatio-Temporal Reasoning for Reliable Facial Expression Interpretation |
Type |
Conference Article |
| Year |
2007 |
Publication |
Proceedings of the 5th International Conference on Computer Vision Systems |
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Bielefeld University (Germany) |
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ICVS |
| Notes |
ISE |
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no |
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ISE @ ise @ OGA2007 |
Serial |
772 |
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| Author |
Francisco Javier Orozco; Jordi Gonzalez; Ignasi Rius; Xavier Roca |
| Title |
Hierarchical Eyelid and Face Tracking |
Type |
Book Chapter |
| Year |
2007 |
Publication |
3rd Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA 2007), J. Marti et al. (Eds.) LNCS 4477:499–506 |
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Girona (Spain) |
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ISE |
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no |
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ISE @ ise @ OGR2007 |
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773 |
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| Author |
Lubomir Latchev; Maya Dimitrova; David Rotger |
| Title |
A Classifier of Technical Diagnostic States of Electrocardiograph |
Type |
Miscellaneous |
| Year |
2006 |
Publication |
International Conference on Computer Systems and Technologies (CompSysTech´06), 15.1–15.6 |
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University of Veliko Tarnovo (Bulgaria) |
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no |
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Admin @ si @ LDR2006 |
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774 |
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| Author |
Alicia Fornes; Sergio Escalera; Josep Llados; Gemma Sanchez; Petia Radeva; Oriol Pujol |
| Title |
Handwritten Symbol Recognition by a Boosted Blurred Shape Model with Error Correction |
Type |
Book Chapter |
| Year |
2007 |
Publication |
3rd Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA 2007), J. Marti et al. (Eds.) LNCS 4477:13–21 |
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Girona (Spain) |
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MILAB;DAG;HUPBA |
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BCNPCL @ bcnpcl @ FEL2007a |
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775 |
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