| Records |
| Author |
Eduard Vazquez; Ramon Baldrich |
| Title |
Non-supervised goodness measure for image segmentation |
Type |
Conference Article |
| Year |
2010 |
Publication |
Proceedings of The CREATE 2010 Conference |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
334–335 |
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| Address |
Gjovik, Norway |
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Conference |
CREATE |
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CIC |
Approved |
no |
Call Number  |
CAT @ cat @ VaB2010 |
Serial |
1299 |
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| Author |
Eduard Vazquez; Ramon Baldrich |
| Title |
Colour Image Segmentation in Presence of Shadows |
Type |
Conference Article |
| Year |
2008 |
Publication |
4th European Conference on Colour in Graphics, Imaging and Vision Proceedings |
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| Volume |
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Issue |
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Pages |
383–387 |
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| Address |
Terrassa (Spain) |
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Conference |
CGIV08 |
| Notes |
CAT;CIC |
Approved |
no |
| Call Number |
CAT @ cat @ VaB2008 |
Serial |
966 |
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| Author |
Francesc Tous; Maria Vanrell; Ramon Baldrich |
| Title |
Relaxed Grey-World: Computational Colour Constancy by Surface Matching |
Type |
Book Chapter |
| Year |
2005 |
Publication |
Pattern Recognition and Image Analysis (IbPRIA 2005), LNCS 3522:192–199 |
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Estoril (Portugal) |
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CIC |
Approved |
no |
| Call Number |
CAT @ cat @ TVB2005 |
Serial |
555 |
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| Author |
Francesc Tous; Maria Vanrell; Ramon Baldrich |
| Title |
Exploring Colour Constancy Solutions. |
Type |
Miscellaneous |
| Year |
2004 |
Publication |
CGIV 2004 Second European Conference on Colour in Graphics, Imaging, and Vision, 24:29 |
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| Address |
Aachen (Germany) |
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CIC |
Approved |
no |
| Call Number |
CAT @ cat @ TVB2004 |
Serial |
452 |
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| Author |
Francesc Tous; Agnes Borras; Robert Benavente; Ramon Baldrich; Maria Vanrell; Josep Llados |
| Title |
Textual Descriptions for Browsing People by Visual Apperance. |
Type |
Book Chapter |
| Year |
2002 |
Publication |
Lecture Notes in Artificial Intelligence |
Abbreviated Journal |
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| Volume |
2504 |
Issue |
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Pages |
419-429 |
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| Abstract |
This paper presents a first approach to build colour and structural descriptors for information retrieval on a people database. Queries are formulated in terms of their appearance that allows to seek people wearing specific clothes of a given colour name or texture. Descriptors are automatically computed by following three essential steps. A colour naming labelling from pixel properties. A region seg- mentation step based on colour properties of pixels combined with edge information. And a high level step that models the region arrangements in order to build clothes structure. Results are tested on large set of images from real scenes taken at the entrance desk of a building |
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| Publisher |
Springer Verlag |
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| Notes |
DAG;CIC |
Approved |
no |
| Call Number |
CAT @ cat @ TBB2002b |
Serial |
319 |
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| Author |
Francesc Tous; Agnes Borras; Robert Benavente; Ramon Baldrich; Maria Vanrell; Josep Llados |
| Title |
Textual Descriptors for browsing people by visual appearence. |
Type |
Conference Article |
| Year |
2002 |
Publication |
5è. Congrés Català d’Intel·ligència Artificial CCIA |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Keywords |
Image retrieval, textual descriptors, colour naming, colour normalization, graph matching. |
| Abstract |
This paper presents a first approach to build colour and structural descriptors for information retrieval on a people database. Queries are formulated in terms of their appearance that allows to seek people wearing specific clothes of a given colour name or texture. Descriptors are automatically computed by following three essential steps. A colour naming labelling from pixel properties. A region seg- mentation step based on colour properties of pixels combined with edge information. And a high level step that models the region arrangements in order to build clothes structure. Results are tested on large set of images from real scenes taken at the entrance desk of a building. |
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| Notes |
DAG;CIC |
Approved |
no |
| Call Number |
CAT @ cat @ TBB2002a |
Serial |
287 |
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| Author |
Fahad Shahbaz Khan; Joost Van de Weijer; Maria Vanrell |
| Title |
Top-Down Color Attention for Object Recognition |
Type |
Conference Article |
| Year |
2009 |
Publication |
12th International Conference on Computer Vision |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
979 - 986 |
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| Abstract |
Generally the bag-of-words based image representation follows a bottom-up paradigm. The subsequent stages of the process: feature detection, feature description, vocabulary construction and image representation are performed independent of the intentioned object classes to be detected. In such a framework, combining multiple cues such as shape and color often provides below-expected results. This paper presents a novel method for recognizing object categories when using multiple cues by separating the shape and color cue. Color is used to guide attention by means of a top-down category-specific attention map. The color attention map is then further deployed to modulate the shape features by taking more features from regions within an image that are likely to contain an object instance. This procedure leads to a category-specific image histogram representation for each category. Furthermore, we argue that the method combines the advantages of both early and late fusion. We compare our approach with existing methods that combine color and shape cues on three data sets containing varied importance of both cues, namely, Soccer ( color predominance), Flower (color and shape parity), and PASCAL VOC Challenge 2007 (shape predominance). The experiments clearly demonstrate that in all three data sets our proposed framework significantly outperforms the state-of-the-art methods for combining color and shape information. |
| Address |
Kyoto, Japan |
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Edition |
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| ISSN |
1550-5499 |
ISBN |
978-1-4244-4420-5 |
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Expedition |
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Conference |
ICCV |
| Notes |
CIC |
Approved |
no |
| Call Number |
CAT @ cat @ SWV2009 |
Serial |
1196 |
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| Author |
Anna Salvatella; Maria Vanrell; Juan J. Villanueva |
| Title |
Texture Description based on Subtexture Components, 3rd International Workshop on Texture Syntesis and Analysis |
Type |
Conference Article |
| Year |
2003 |
Publication |
3rd International Workshop on Texture Synthesis and Analysis, |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
77–82 |
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| Abstract |
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| Address |
Nice |
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ISBN |
1-904410-11-1 |
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Conference |
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| Notes |
CIC |
Approved |
no |
| Call Number |
CAT @ cat @ SVV2003 |
Serial |
422 |
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| Author |
Anna Salvatella; Maria Vanrell; Ramon Baldrich |
| Title |
Subtexture Components for Texture Description |
Type |
Miscellaneous |
| Year |
2003 |
Publication |
Lecture Notes in Computer Science, vol 2652, pp 884–892 |
Abbreviated Journal |
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Springer-Verlag |
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CIC |
Approved |
no |
| Call Number |
CAT @ cat @ SVR2003 |
Serial |
421 |
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| Author |
Anna Salvatella; Maria Vanrell |
| Title |
Towards a texture representation database |
Type |
Report |
| Year |
2002 |
Publication |
CVC Technical Report #60 |
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CVC (UAB) |
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CIC |
Approved |
no |
| Call Number |
CAT @ cat @ SaV2002 |
Serial |
526 |
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| Author |
David Augusto Rojas; Joost Van de Weijer; Theo Gevers |
| Title |
Color Edge Saliency Boosting using Natural Image Statistics |
Type |
Conference Article |
| Year |
2010 |
Publication |
5th European Conference on Colour in Graphics, Imaging and Vision and 12th International Symposium on Multispectral Colour Science |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
228–234 |
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| Abstract |
State of the art methods for image matching, content-based retrieval and recognition use local features. Most of these still exploit only the luminance information for detection. The color saliency boosting algorithm has provided an efficient method to exploit the saliency of color edges based on information theory. However, during the design of this algorithm, some issues were not addressed in depth: (1) The method has ignored the underlying distribution of derivatives in natural images. (2) The dependence of information content in color-boosted edges on its spatial derivatives has not been quantitatively established. (3) To evaluate luminance and color contributions to saliency of edges, a parameter gradually balancing both contributions is required.
We introduce a novel algorithm, based on the principles of independent component analysis, which models the first order derivatives of color natural images by a generalized Gaussian distribution. Furthermore, using this probability model we show that for images with a Laplacian distribution, which is a particular case of generalized Gaussian distribution, the magnitudes of color-boosted edges reflect their corresponding information content. In order to evaluate the impact of color edge saliency in real world applications, we introduce an extension of the Laplacian-of-Gaussian detector to color, and the performance for image matching is evaluated. Our experiments show that our approach provides more discriminative regions in comparison with the original detector. |
| Address |
Joensuu, Finland |
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ISBN |
9781617388897 |
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Conference |
CGIV/MCS |
| Notes |
ISE |
Approved |
no |
| Call Number |
CAT @ cat @ RWG2010 |
Serial |
1306 |
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| Author |
Partha Pratim Roy; Eduard Vazquez; Josep Llados; Ramon Baldrich; Umapada Pal |
| Title |
A System to Segment Text and Symbols from Color Maps |
Type |
Book Chapter |
| Year |
2008 |
Publication |
Graphics Recognition. Recent Advances and New Opportunities |
Abbreviated Journal |
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| Volume |
5046 |
Issue |
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Pages |
245-256 |
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LNCS |
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DAG;CIC |
Approved |
no |
| Call Number |
CAT @ cat @ RVL2008 |
Serial |
1005 |
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| Author |
Partha Pratim Roy; Eduard Vazquez; Josep Llados; Ramon Baldrich; Umapada Pal |
| Title |
A System to Retrieve Text/Symbols from Color Maps using Connected Component and Skeleton Analysis |
Type |
Conference Article |
| Year |
2007 |
Publication |
Seventh IAPR International Workshop on Graphics Recognition |
Abbreviated Journal |
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Pages |
79–78 |
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| Address |
Curitiba (Brasil) |
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Editor |
J. Llados, W. Liu, J.M. Ogier |
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Conference |
GREC |
| Notes |
CAT; DAG;CIC |
Approved |
no |
| Call Number |
CAT @ cat @ RVL2007 |
Serial |
836 |
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| Author |
David Augusto Rojas; Fahad Shahbaz Khan; Joost Van de Weijer |
| Title |
The Impact of Color on Bag-of-Words based Object Recognition |
Type |
Conference Article |
| Year |
2010 |
Publication |
20th International Conference on Pattern Recognition |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
1549–1553 |
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| Abstract |
In recent years several works have aimed at exploiting color information in order to improve the bag-of-words based image representation. There are two stages in which color information can be applied in the bag-of-words framework. Firstly, feature detection can be improved by choosing highly informative color-based regions. Secondly, feature description, typically focusing on shape, can be improved with a color description of the local patches. Although both approaches have been shown to improve results the combined merits have not yet been analyzed. Therefore, in this paper we investigate the combined contribution of color to both the feature detection and extraction stages. Experiments performed on two challenging data sets, namely Flower and Pascal VOC 2009; clearly demonstrate that incorporating color in both feature detection and extraction significantly improves the overall performance. |
| Address |
Istanbul (Turkey) |
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Edition |
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| ISSN |
1051-4651 |
ISBN |
978-1-4244-7542-1 |
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Conference |
ICPR |
| Notes |
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Approved |
no |
| Call Number |
CAT @ cat @ RKW2010 |
Serial |
1415 |
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| Author |
A. Richichi; O. Fors; M.T. Merino; Xavier Otazu; J. Nuñez; A. Prades; U. Thiele; D. Perez-Ramirez; F.J. Montojo |
| Title |
The Calar Alto lunar occultation program: update and new results |
Type |
Journal |
| Year |
2006 |
Publication |
Astronomy and Astrophysics (Section ’Stellar structure and evolution’), 445:1081–1088 |
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CIC |
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no |
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CAT @ cat @ RFM2006a |
Serial |
589 |
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