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Author
Patricia Marquez; Debora Gil; Aura Hernandez-Sabate
Title
A Confidence Measure for Assessing Optical Flow Accuracy in the Absence of Ground Truth
Type
Conference Article
Year
2011
Publication
IEEE International Conference on Computer Vision – Workshops
Abbreviated Journal
Volume
Issue
Pages
2042-2049
Keywords
IEEE International Conference on Computer Vision – Workshops
Abstract
Optical flow is a valuable tool for motion analysis in autonomous navigation systems. A reliable application requires determining the accuracy of the computed optical flow. This is a main challenge given the absence of ground truth in real world sequences. This paper introduces a measure of optical flow accuracy for Lucas-Kanade based flows in terms of the numerical stability of the data-term. We call this measure optical flow condition number. A statistical analysis over ground-truth data show a good statistical correlation between the condition number and optical flow error. Experiments on driving sequences illustrate its potential for autonomous navigation systems.
Address
Corporate Author
Thesis
Publisher
IEEE
Place of Publication
Barcelona (Spain)
Editor
Language
English
Summary Language
English
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
ICCVW
Notes
IAM; ADAS
Approved
no
Call Number
IAM @ iam @ MGH2011
Serial
1682
Permanent link to this record
Author
Patricia Marquez; Debora Gil; Aura Hernandez-Sabate
Title
Evaluation of the Capabilities of Confidence Measures for Assessing Optical Flow Quality
Type
Conference Article
Year
2013
Publication
ICCV Workshop on Computer Vision in Vehicle Technology: From Earth to Mars
Abbreviated Journal
Volume
Issue
Pages
624-631
Keywords
Abstract
Assessing Optical Flow (OF) quality is essential for its further use in reliable decision support systems. The absence of ground truth in such situations leads to the computation of OF Confidence Measures (CM) obtained from either input or output data. A fair comparison across the capabilities of the different CM for bounding OF error is required in order to choose the best OF-CM pair for discarding points where OF computation is not reliable. This paper presents a statistical probabilistic framework for assessing the quality of a given CM. Our quality measure is given in terms of the percentage of pixels whose OF error bound can not be determined by CM values. We also provide statistical tools for the computation of CM values that ensures a given accuracy of the flow field.
Address
Sydney; Australia; December 2013
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
CVTT:E2M
Notes
IAM; ADAS; 600.044; 600.057; 601.145
Approved
no
Call Number
Admin @ si @ MGH2013b
Serial
2351
Permanent link to this record
Author
Patricia Marquez; Debora Gil ; Aura Hernandez-Sabate
Title
Error Analysis for Lucas-Kanade Based Schemes
Type
Conference Article
Year
2012
Publication
9th International Conference on Image Analysis and Recognition
Abbreviated Journal
Volume
7324
Issue
I
Pages
184-191
Keywords
Optical flow, Confidence measure, Lucas-Kanade, Cardiac Magnetic Resonance
Abstract
Optical flow is a valuable tool for motion analysis in medical imaging sequences. A reliable application requires determining the accuracy of the computed optical flow. This is a main challenge given the absence of ground truth in medical sequences. This paper presents an error analysis of Lucas-Kanade schemes in terms of intrinsic design errors and numerical stability of the algorithm. Our analysis provides a confidence measure that is naturally correlated to the accuracy of the flow field. Our experiments show the higher predictive value of our confidence measure compared to existing measures.
Address
Aveiro, Portugal
Corporate Author
Thesis
Publisher
Springer-Verlag Berlin Heidelberg
Place of Publication
Editor
Language
english
Summary Language
Original Title
Series Editor
Campilho, Aurélio and Kamel, Mohamed
Series Title
Lecture Notes in Computer Science
Abbreviated Series Title
LNCS
Series Volume
Series Issue
Edition
ISSN
0302-9743
ISBN
978-3-642-31294-6
Medium
Area
Expedition
Conference
ICIAR
Notes
IAM
Approved
no
Call Number
IAM @ iam @ MGH2012a
Serial
1899
Permanent link to this record
Author
Oriol Rodriguez-Leon; Josefina Mauri;Eduard Fernandez-Nofrerias; C.Garcia; R.Villuendas; Vicente del Valle; Debora Gil;Petia Radeva
Title
Reconstruction of a spatio-temporal model of the intima layer from intravascular ultrasound sequences
Type
Journal Article
Year
2003
Publication
European Heart Journal
Abbreviated Journal
Volume
Issue
Pages
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
ESC Congress
Notes
IAM;MILAB
Approved
no
Call Number
IAM @ iam @ RMF2003c
Serial
1641
Permanent link to this record
Author
Oriol Rodriguez-Leon; Josefina Mauri;Eduard Fernandez-Nofrerias; Antonio Tovar; Vicente del Valle; Aura Hernandez-Sabate; Debora Gil; Petia Radeva
Title
Utilizacion de la estructura de los campos vectoriales para la deteccion de la Adventicia en imagenes de Ecografia Intracoronaria
Type
Journal
Year
2004
Publication
Revista Española de Cardiología
Abbreviated Journal
REC
Volume
57
Issue
2
Pages
100
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
SEC
Notes
MILAB;IAM
Approved
no
Call Number
BCNPCL @ bcnpcl @ RMF2004
Serial
566
Permanent link to this record
Author
Oriol Rodriguez-Leon; Josefina Mauri;Eduard Fernandez-Nofrerias; Antonio Tovar; Vicente del Valle; Aura Hernandez-Sabate; Debora Gil; Petia Radeva
Title
Utilización de la Estructura de los Campos Vectoriales para la Detección de la Adventicia en Imágenes de Ecografía Intracoronaria
Type
Journal Article
Year
2004
Publication
Revista Internacional de Enfermedades Cardiovasculares Revista Española de Cardiología
Abbreviated Journal
Volume
57
Issue
2
Pages
100
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
SEC
Notes
IAM;MILAB
Approved
no
Call Number
IAM @ iam @ RMF2004
Serial
1642
Permanent link to this record
Author
Oriol Rodriguez-Leon; Josefina Mauri; Eduard Fernandez-Nofrerias; Vicente de Valle; E.Garcia; A.Barrios; Debora Gil; Petia Radeva
Title
Analysis of the changes in angiography local grey-level values to determine myocardial perfusion
Type
Conference Article
Year
2006
Publication
World Congress of Cardiology
Abbreviated Journal
Volume
Issue
Pages
862
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Barcelona (Spain)
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Notes
IAM;MILAB
Approved
no
Call Number
IAM @ iam @ RMF2006
Serial
1644
Permanent link to this record
Author
Oriol Rodriguez-Leon; Josefina Mauri; Eduard Fernandez-Nofrerias; M.Gomez; Antonio Tovar; L.Cano; C.Diego; Carme Julia; Vicente del Valle; Debora Gil; Petia Radeva
Title
Ecografia Intracoronaria: Segmentacio Automatica de area de la llum
Type
Journal
Year
2002
Publication
Revista Societat Catalana de Cardiologia
Abbreviated Journal
Volume
4
Issue
4
Pages
42
Keywords
Abstract
Address
Barcelona
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
XIVe Congres de la Societat Catalana de Cardiologia
Notes
MILAB;IAM
Approved
no
Call Number
BCNPCL @ bcnpcl @ RMF2002
Serial
435
Permanent link to this record
Author
Oriol Rodriguez-Leon; Josefina Mauri; Eduard Fernandez-Nofrerias; M.Gomez; Antonio Tovar; L.Cano; C.Diego; Carme Julia; Vicente del Valle; Debora Gil; Petia Radeva
Title
Ecografia Intracoronària: Segmentació Automàtica de area de la llum
Type
Conference Article
Year
2002
Publication
XXXVIII Congreso Nacional de la Sociedad Española de Cardiología.
Abbreviated Journal
Volume
Issue
Pages
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Notes
IAM;ADAS;MILAB
Approved
no
Call Number
IAM @ iam @ RMF2002
Serial
1638
Permanent link to this record
Author
Oriol Rodriguez-Leon; Eduard Fernandez-Nofrerias; Josefina Mauri; Vicente del Valle; Debora Gil; A.Barrios; E.Garcia; Petia Radeva
Title
Perfusion ratio: A new tool to objectively assess microcirculation perfusion after primary Percutaneous Coronary Intervention
Type
Conference Article
Year
2006
Publication
World Congress of Cardiology
Abbreviated Journal
Volume
Issue
Pages
859
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Barcelona (Spain)
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Notes
IAM;MILAB
Approved
no
Call Number
IAM @ iam @ RFM2006c
Serial
1643
Permanent link to this record
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