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Author | E. Serradell; Adriana Romero; R. Leta; Carlo Gatta; Francesc Moreno-Noguer | ||||
Title | Simultaneous Correspondence and Non-Rigid 3D Reconstruction of the Coronary Tree from Single X-Ray Images | Type | Conference Article | ||
Year | 2011 | Publication | 13th IEEE International Conference on Computer Vision | Abbreviated Journal | |
Volume | Issue | Pages | 850-857 | ||
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Address | Barcelona | ||||
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Area | Expedition | Conference | ICCV | ||
Notes | MILAB | Approved | no | ||
Call Number | Admin @ si @ SRL2011 | Serial | 1803 | ||
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Author | G.D. Evangelidis; Ferran Diego; Joan Serrat; Antonio Lopez | ||||
Title | Slice Matching for Accurate Spatio-Temporal Alignment | Type | Conference Article | ||
Year | 2011 | Publication | In ICCV Workshop on Visual Surveillance | Abbreviated Journal | |
Volume | Issue | Pages | |||
Keywords | video alignment | ||||
Abstract | Video synchronization and alignment is a rather recent topic in computer vision. It usually deals with the problem of aligning sequences recorded simultaneously by static, jointly- or independently-moving cameras. In this paper, we investigate the more difficult problem of matching videos captured at different times from independently-moving cameras, whose trajectories are approximately coincident or parallel. To this end, we propose a novel method that pixel-wise aligns videos and allows thus to automatically highlight their differences. This primarily aims at visual surveillance but the method can be adopted as is by other related video applications, like object transfer (augmented reality) or high dynamic range video. We build upon a slice matching scheme to first synchronize the sequences, while we develop a spatio-temporal alignment scheme to spatially register corresponding frames and refine the temporal mapping. We investigate the performance of the proposed method on videos recorded from vehicles driven along different types of roads and compare with related previous works. | ||||
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Area | Expedition | Conference | VS | ||
Notes | ADAS | Approved | no | ||
Call Number | Admin @ si @ EDS2011; ADAS @ adas @ eds2011a | Serial | 1861 | ||
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Author | Naveen Onkarappa; Angel Sappa | ||||
Title | Space Variant Representations for Mobile Platform Vision Applications | Type | Conference Article | ||
Year | 2011 | Publication | 14th International Conference on Computer Analysis of Images and Patterns | Abbreviated Journal | |
Volume | 6855 | Issue | II | Pages | 146-154 |
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Abstract | The log-polar space variant representation, motivated by biological vision, has been widely studied in the literature. Its data reduction and invariance properties made it useful in many vision applications. However, due to its nature, it fails in preserving features in the periphery. In the current work, as an attempt to overcome this problem, we propose a novel space-variant representation. It is evaluated and proved to be better than the log-polar representation in preserving the peripheral information, crucial for on-board mobile vision applications. The evaluation is performed by comparing log-polar and the proposed representation once they are used for estimating dense optical flow. | ||||
Address | Seville, Spain | ||||
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Publisher | Springer Berlin Heidelberg | Place of Publication | Editor | P. Real, D. Diaz, H. Molina, A. Berciano, W. Kropatsch | |
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ISSN | 0302-9743 | ISBN | 978-3-642-23677-8 | Medium | |
Area | Expedition | Conference | CAIP | ||
Notes | ADAS | Approved | no | ||
Call Number | NaS2011; ADAS @ adas @ | Serial | 1686 | ||
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Author | Debora Gil; Aura Hernandez-Sabate; Mireia Brunat;Steven Jansen; Jordi Martinez-Vilalta | ||||
Title | Structure-preserving smoothing of biomedical images | Type | Journal Article | ||
Year | 2011 | Publication | Pattern Recognition | Abbreviated Journal | PR |
Volume | 44 | Issue | 9 | Pages | 1842-1851 |
Keywords | Non-linear smoothing; Differential geometry; Anatomical structures; segmentation; Cardiac magnetic resonance; Computerized tomography | ||||
Abstract | Smoothing of biomedical images should preserve gray-level transitions between adjacent tissues, while restoring contours consistent with anatomical structures. Anisotropic diffusion operators are based on image appearance discontinuities (either local or contextual) and might fail at weak inter-tissue transitions. Meanwhile, the output of block-wise and morphological operations is prone to present a block structure due to the shape and size of the considered pixel neighborhood. In this contribution, we use differential geometry concepts to define a diffusion operator that restricts to image consistent level-sets. In this manner, the final state is a non-uniform intensity image presenting homogeneous inter-tissue transitions along anatomical structures, while smoothing intra-structure texture. Experiments on different types of medical images (magnetic resonance, computerized tomography) illustrate its benefit on a further process (such as segmentation) of images. | ||||
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ISSN | 0031-3203 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | IAM; ADAS | Approved | no | ||
Call Number | IAM @ iam @ GHB2011 | Serial | 1526 | ||
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Author | Muhammad Muzzamil Luqman; Jean-Yves Ramel; Josep Llados; Thierry Brouard | ||||
Title | Subgraph Spotting Through Explicit Graph Embedding: An Application to Content Spotting in Graphic Document Images | Type | Conference Article | ||
Year | 2011 | Publication | 11th International Conference on Document Analysis and Recognition | Abbreviated Journal | |
Volume | Issue | Pages | 870-874 | ||
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Abstract | We present a method for spotting a subgraph in a graph repository. Subgraph spotting is a very interesting research problem for various application domains where the use of a relational data structure is mandatory. Our proposed method accomplishes subgraph spotting through graph embedding. We achieve automatic indexation of a graph repository during off-line learning phase, where we (i) break the graphs into 2-node sub graphs (a.k.a. cliques of order 2), which are primitive building-blocks of a graph, (ii) embed the 2-node sub graphs into feature vectors by employing our recently proposed explicit graph embedding technique, (iii) cluster the feature vectors in classes by employing a classic agglomerative clustering technique, (iv) build an index for the graph repository and (v) learn a Bayesian network classifier. The subgraph spotting is achieved during the on-line querying phase, where we (i) break the query graph into 2-node sub graphs, (ii) embed them into feature vectors, (iii) employ the Bayesian network classifier for classifying the query 2-node sub graphs and (iv) retrieve the respective graphs by looking-up in the index of the graph repository. The graphs containing all query 2-node sub graphs form the set of result graphs for the query. Finally, we employ the adjacency matrix of each result graph along with a score function, for spotting the query graph in it. The proposed subgraph spotting method is equally applicable to a wide range of domains, offering ease of query by example (QBE) and granularity of focused retrieval. Experimental results are presented for graphs generated from two repositories of electronic and architectural document images. | ||||
Address | Beijing, China | ||||
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Series Volume | Series Issue | Edition | |||
ISSN | 1520-5363 | ISBN | 978-1-4577-1350-7 | Medium | |
Area | Expedition | Conference | ICDAR | ||
Notes | DAG | Approved | no | ||
Call Number | Admin @ si @ LRL2011 | Serial | 1790 | ||
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Author | Fadi Dornaika; Bogdan Raducanu | ||||
Title | Subtle Facial Expression Recognition in Still Images and Videos | Type | Book Chapter | ||
Year | 2011 | Publication | Advances in Face Image Analysis: Techniques and Technologies | Abbreviated Journal | |
Volume | Issue | 14 | Pages | 259-277 | |
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Abstract | This chapter addresses the recognition of basic facial expressions. It has three main contributions. First, the authors introduce a view- and texture independent schemes that exploits facial action parameters estimated by an appearance-based 3D face tracker. they represent the learned facial actions associated with different facial expressions by time series. Two dynamic recognition schemes are proposed: (1) the first is based on conditional predictive models and on an analysis-synthesis scheme, and (2) the second is based on examples allowing straightforward use of machine learning approaches. Second, the authors propose an efficient recognition scheme based on the detection of keyframes in videos. Third, the authors compare the dynamic scheme with a static one based on analyzing individual snapshots and show that in general the former performs better than the latter. The authors then provide evaluations of performance using Linear Discriminant Analysis (LDA), Non parametric Discriminant Analysis (NDA), and Support Vector Machines (SVM). | ||||
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Publisher | IGI-Global | Place of Publication | New York, USA | Editor | Yu-Jin Zhang |
Language | Summary Language | Original Title | |||
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ISSN | ISBN | 978-1-6152-0991-0 | Medium | ||
Area | Expedition | Conference | |||
Notes | OR;MV | Approved | no | ||
Call Number | Admin @ si @ DoR2011 | Serial | 1751 | ||
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Author | Anjan Dutta; Josep Llados; Umapada Pal | ||||
Title | Symbol Spotting in Line Drawings Through Graph Paths Hashing | Type | Conference Article | ||
Year | 2011 | Publication | 11th International Conference on Document Analysis and Recognition | Abbreviated Journal | |
Volume | Issue | Pages | 982-986 | ||
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Abstract | In this paper we propose a symbol spotting technique through hashing the shape descriptors of graph paths (Hamiltonian paths). Complex graphical structures in line drawings can be efficiently represented by graphs, which ease the accurate localization of the model symbol. Graph paths are the factorized substructures of graphs which enable robust recognition even in the presence of noise and distortion. In our framework, the entire database of the graphical documents is indexed in hash tables by the locality sensitive hashing (LSH) of shape descriptors of the paths. The hashing data structure aims to execute an approximate k-NN search in a sub-linear time. The spotting method is formulated by a spatial voting scheme to the list of locations of the paths that are decided during the hash table lookup process. We perform detailed experiments with various dataset of line drawings and the results demonstrate the effectiveness and efficiency of the technique. | ||||
Address | Beijing, China | ||||
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 | 1520-5363 | ISBN | 978-1-4577-1350-7 | Medium | |
Area | Expedition | Conference | ICDAR | ||
Notes | DAG | Approved | no | ||
Call Number | Admin @ si @ DLP2011b | Serial | 1791 | ||
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Author | Michal Drozdzal; Santiago Segui; Petia Radeva; Jordi Vitria; Laura Igual | ||||
Title | System and Method for Displaying Motility Events in an in Vivo Image Stream | Type | Patent | ||
Year | 2011 | Publication | US 61/592,786 | Abbreviated Journal | |
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Address | Given Imaging | ||||
Corporate Author | US Patent Office | Thesis | |||
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Area | Expedition | Conference | |||
Notes | MILAB; OR;MV | Approved | no | ||
Call Number | Admin @ si @ DSR2011 | Serial | 1897 | ||
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Author | Marcel P. Lucassen; Theo Gevers; Arjan Gijsenij | ||||
Title | Texture Affects Color Emotion | Type | Journal Article | ||
Year | 2011 | Publication | Color Research & Applications | Abbreviated Journal | CRA |
Volume | 36 | Issue | 6 | Pages | 426–436 |
Keywords | color;texture;color emotion;observer variability;ranking | ||||
Abstract | Several studies have recorded color emotions in subjects viewing uniform color (UC) samples. We conduct an experiment to measure and model how these color emotions change when texture is added to the color samples. Using a computer monitor, our subjects arrange samples along four scales: warm–cool, masculine–feminine, hard–soft, and heavy–light. Three sample types of increasing visual complexity are used: UC, grayscale textures, and color textures (CTs). To assess the intraobserver variability, the experiment is repeated after 1 week. Our results show that texture fully determines the responses on the Hard-Soft scale, and plays a role of decreasing weight for the masculine–feminine, heavy–light, and warm–cool scales. Using some 25,000 observer responses, we derive color emotion functions that predict the group-averaged scale responses from the samples' color and texture parameters. For UC samples, the accuracy of our functions is significantly higher (average R2 = 0.88) than that of previously reported functions applied to our data. The functions derived for CT samples have an accuracy of R2 = 0.80. We conclude that when textured samples are used in color emotion studies, the psychological responses may be strongly affected by texture. © 2010 Wiley Periodicals, Inc. Col Res Appl, 2010 | ||||
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Notes | ALTRES;ISE | Approved | no | ||
Call Number | Admin @ si @ LGG2011 | Serial | 1844 | ||
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Author | Joost Van de Weijer; Shida Beigpour | ||||
Title | The Dichromatic Reflection Model: Future Research Directions and Applications | Type | Conference Article | ||
Year | 2011 | Publication | International Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications | Abbreviated Journal | |
Volume | Issue | Pages | |||
Keywords | dblp | ||||
Abstract | The dichromatic reflection model (DRM) predicts that color distributions form a parallelogram in color space, whose shape is defined by the body reflectance and the illuminant color. In this paper we resume the assumptions which led to the DRM and shortly recall two of its main applications domains: color image segmentation and photometric invariant feature computation. After having introduced the model we discuss several limitations of the theory, especially those which are raised once working on real-world uncalibrated images. In addition, we summerize recent extensions of the model which allow to handle more complicated light interactions. Finally, we suggest some future research directions which would further extend its applicability. | ||||
Address | Algarve, Portugal | ||||
Corporate Author | Thesis | ||||
Publisher | SciTePress | Place of Publication | Editor | Mestetskiy, Leonid and Braz, José | |
Language | Summary Language | Original Title | |||
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ISSN | ISBN | 978-989-8425-47-8 | Medium | ||
Area | Expedition | Conference | VISIGRAPP | ||
Notes | CIC | Approved | no | ||
Call Number | Admin @ si @ WeB2011 | Serial | 1778 | ||
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Author | Alicia Fornes; Anjan Dutta; Albert Gordo; Josep Llados | ||||
Title | The ICDAR 2011 Music Scores Competition: Staff Removal and Writer Identification | Type | Conference Article | ||
Year | 2011 | Publication | 11th International Conference on Document Analysis and Recognition | Abbreviated Journal | |
Volume | Issue | Pages | 1511-1515 | ||
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Abstract | In the last years, there has been a growing interest in the analysis of handwritten music scores. In this sense, our goal has been to foster the interest in the analysis of handwritten music scores by the proposal of two different competitions: Staff removal and Writer Identification. Both competitions have been tested on the CVC-MUSCIMA database: a ground-truth of handwritten music score images. This paper describes the competition details, including the dataset and ground-truth, the evaluation metrics, and a short description of the participants, their methods, and the obtained results. | ||||
Address | Beijing, China | ||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Summary Language | Original Title | |||
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Series Volume | Series Issue | Edition | |||
ISSN | ISBN | 978-0-7695-4520-2 | Medium | ||
Area | Expedition | Conference | ICDAR | ||
Notes | DAG | Approved | no | ||
Call Number | Admin @ si @ FDG2011b | Serial | 1794 | ||
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Author | Arnau Ramisa; David Aldavert; Shrihari Vasudevan; Ricardo Toledo; Ramon Lopez de Mantaras | ||||
Title | The IIIA30 MObile Robot Object Recognition Datset | Type | Conference Article | ||
Year | 2011 | Publication | 11th Portuguese Robotics Open | Abbreviated Journal | |
Volume | Issue | Pages | |||
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Abstract | Object perception is a key feature in order to make mobile robots able to perform high-level tasks. However, research aimed at addressing the constraints and limitations encountered in a mobile robotics scenario, like low image resolution, motion blur or tight computational constraints, is still very scarce. In order to facilitate future research in this direction, in this work we present an object detection and recognition dataset acquired using a mobile robotic platform. As a baseline for the dataset, we evaluated the cascade of weak classifiers object detection method from Viola and Jones. | ||||
Address | Lisboa | ||||
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Language | Summary Language | Original Title | |||
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Area | Expedition | Conference | Robotica | ||
Notes | RV;ADAS | Approved | no | ||
Call Number | Admin @ si @ RAV2011 | Serial | 1777 | ||
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Author | Naila Murray; Sandra Skaff; Luca Marchesotti; Florent Perronnin | ||||
Title | Towards Automatic Concept Transfer | Type | Conference Article | ||
Year | 2011 | Publication | Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Non-Photorealistic Animation and Rendering | Abbreviated Journal | |
Volume | Issue | Pages | 167.176 | ||
Keywords | chromatic modeling, color concepts, color transfer, concept transfer | ||||
Abstract | This paper introduces a novel approach to automatic concept transfer; examples of concepts are “romantic”, “earthy”, and “luscious”. The approach modifies the color content of an input image given only a concept specified by a user in natural language, thereby requiring minimal user input. This approach is particularly useful for users who are aware of the message they wish to convey in the transferred image while being unsure of the color combination needed to achieve the corresponding transfer. The user may adjust the intensity level of the concept transfer to his/her liking with a single parameter. The proposed approach uses a convex clustering algorithm, with a novel pruning mechanism, to automatically set the complexity of models of chromatic content. It also uses the Earth-Mover's Distance to compute a mapping between the models of the input image and the target chromatic concept. Results show that our approach yields transferred images which effectively represent concepts, as confirmed by a user study. | ||||
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Publisher | ACM Press | Place of Publication | Editor | ||
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ISSN | ISBN | 978-1-4503-0907-3 | Medium | ||
Area | Expedition | Conference | NPAR | ||
Notes | CIC | Approved | no | ||
Call Number | Admin @ si @ MSM2011 | Serial | 1866 | ||
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Author | Jorge Bernal; Fernando Vilariño; F. Javier Sanchez | ||||
Title | Towards Intelligent Systems for Colonoscopy | Type | Book Chapter | ||
Year | 2011 | Publication | Colonoscopy | Abbreviated Journal | |
Volume | 1 | Issue | Pages | 257-282 | |
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Abstract | In this chapter we present tools that can be used to build intelligent systems for colonoscopy.
The idea is, by using methods based on computer vision and artificial intelligence, add significant value to the colonoscopy procedure. Intelligent systems are being used to assist in other medical interventions |
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Publisher | Intech | Place of Publication | Editor | Paul Miskovitz | |
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ISSN | ISBN | 978-953-307-568-6 | Medium | ||
Area | 800 | Expedition | Conference | ||
Notes | MV;SIAI | Approved | no | ||
Call Number | IAM @ iam @ BVS2011 | Serial | 1697 | ||
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Author | Carles Sanchez | ||||
Title | Tracheal ring detection in bronchoscopy | Type | Report | ||
Year | 2011 | Publication | CVC Technical Report | Abbreviated Journal | |
Volume | 168 | Issue | Pages | ||
Keywords | Bronchoscopy, tracheal ring, segmentation | ||||
Abstract | Endoscopy is the process in which a camera is introduced inside a human.
Given that endoscopy provides realistic images (in contrast to other modalities) and allows non-invase minimal intervention procedures (which can aid in diagnosis and surgical interventions), its use has spreaded during last decades. In this project we will focus on bronchoscopic procedures, during which the camera is introduced through the trachea in order to have a diagnostic of the patient. The diagnostic interventions are focused on: degree of stenosis (reduction in tracheal area), prosthesis or early diagnosis of tumors. In the first case, assessment of the luminal area and the calculation of the diameters of the tracheal rings are required. A main limitation is that all the process is done by hand, which means that the doctor takes all the measurements and decisions just by looking at the screen. As far as we know there is no computational framework for helping the doctors in the diagnosis. This project will consist of analysing bronchoscopic videos in order to extract useful information for the diagnostic of the degree of stenosis. In particular we will focus on segmentation of the tracheal rings. As a result of this project several strategies (for detecting tracheal rings) had been implemented in order to compare their performance. |
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Corporate Author | Thesis | Master's thesis | |||
Publisher | Place of Publication | Editor | Debora Gil, F.Javier Sanchez | ||
Language | english | Summary Language | english | Original Title | |
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Notes | IAM;MV | Approved | no | ||
Call Number | IAM @ iam @ San2011 | Serial | 1841 | ||
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