| Records |
| Author |
Xavier Otazu; Maria Vanrell; C. Alejandro Parraga |
| Title |
Multiresolution Wavelet Framework Models Brightness Induction Effects |
Type  |
Journal |
| Year |
2008 |
Publication |
Vision Research |
Abbreviated Journal |
VR |
| Volume |
48 |
Issue |
5 |
Pages |
733–751 |
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CIC |
Approved |
no |
| Call Number |
CAT @ cat @ OVP2008a |
Serial |
927 |
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| Author |
Robert Benavente; Maria Vanrell; Ramon Baldrich |
| Title |
Parametric Fuzzy Sets for Automatic Color Naming |
Type |
Journal |
| Year |
2008 |
Publication |
Journal of the Optical Society of America A |
Abbreviated Journal |
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| Volume |
25 |
Issue |
10 |
Pages |
2582–2593 |
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CIC |
Approved |
no |
| Call Number |
CAT @ cat @ BVB2008 |
Serial |
1004 |
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| Author |
Xavier Otazu; Maria Vanrell; C. Alejandro Parraga |
| Title |
Colour induction effects are modelled by a low-level multiresolution wavelet framework |
Type |
Journal |
| Year |
2008 |
Publication |
Perception 37(Suppl.): 107 |
Abbreviated Journal |
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| Notes |
CIC |
Approved |
no |
| Call Number |
CAT @ cat @ OVP2008b |
Serial |
1055 |
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| Author |
Robert Benavente; Gemma Sanchez; Ramon Baldrich; Maria Vanrell; Josep Llados |
| Title |
Normalized colour segmentation for human appearance description. |
Type |
Conference Article |
| Year |
2000 |
Publication |
15 th International Conference on Pattern Recognition |
Abbreviated Journal |
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| Volume |
3 |
Issue |
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Pages |
637-641 |
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| Abstract |
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| Address |
Barcelona. |
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Expedition |
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Conference |
ICPR |
| Notes |
DAG;CIC |
Approved |
no |
| Call Number |
CAT @ cat @ BSB2000 |
Serial |
223 |
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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 |
Agnes Borras; Francesc Tous; Josep Llados; Maria Vanrell |
| Title |
High-Level Clothes Description Based on Colour-Texture and Structural Features |
Type |
Conference Article |
| Year |
2003 |
Publication |
1rst. Iberian Conference on Pattern Recognition and Image Analysis IbPRIA 2003 |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Keywords |
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| Abstract |
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| Address |
Palma de Mallorca |
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Conference |
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| Notes |
DAG;CIC |
Approved |
no |
| Call Number |
CAT @ cat @ BTL2003b |
Serial |
369 |
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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 |
| Keywords |
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| Abstract |
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| Address |
Nice |
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Thesis |
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Place of Publication |
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Edition |
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ISBN |
1-904410-11-1 |
Medium |
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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 |
Fernando Lopez; J.M. Valiente; Ramon Baldrich; Maria Vanrell |
| Title |
Fast surface grading using color statistics in the CIELab space |
Type |
Conference Article |
| Year |
2005 |
Publication |
Pattern Recognition and Image Analysis. IbPRIA 2005 |
Abbreviated Journal |
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| Volume |
LNCS 3523 |
Issue |
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Pages |
66-673 |
| Keywords |
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| Abstract |
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| Address |
Germany |
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LNCS |
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Conference |
IbPRIA |
| Notes |
CIC |
Approved |
no |
| Call Number |
CAT @ cat @ LVB2005 |
Serial |
641 |
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| Author |
Javier Vazquez; Maria Vanrell; Ramon Baldrich |
| Title |
Towards a Psychophysical Evaluation of Colour Constancy Algorithms |
Type |
Conference Article |
| Year |
2008 |
Publication |
4th European Conference on Colour in Graphics, Imaging and Vision Proceedings |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
372–377 |
| Keywords |
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| Abstract |
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| Address |
Terrassa (Spain) |
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Edition |
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Expedition |
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Conference |
CGIV08 |
| Notes |
CAT;CIC |
Approved |
no |
| Call Number |
CAT @ cat @ VVB2008a |
Serial |
968 |
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| Author |
C. Alejandro Parraga; Robert Benavente; Maria Vanrell; Ramon Baldrich |
| Title |
Modelling Inter-Colour Regions of Colour Naming Space |
Type |
Conference Article |
| Year |
2008 |
Publication |
4th European Conference on Colour in Graphics, Imaging and Vision Proceedings |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
218–222 |
| Keywords |
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| Abstract |
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| Address |
Terrassa (Spain) |
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Edition |
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Conference |
CGIV08 |
| Notes |
CAT;CIC |
Approved |
no |
| Call Number |
CAT @ cat @ PBV2008 |
Serial |
969 |
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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 |
| Keywords |
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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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Thesis |
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Place of Publication |
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Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
1550-5499 |
ISBN |
978-1-4244-4420-5 |
Medium |
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| Area |
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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 |
Jaime Moreno; Xavier Otazu; Maria Vanrell |
| Title |
Local Perceptual Weighting in JPEG2000 for Color Images |
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 |
255–260 |
| Keywords |
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| Abstract |
The aim of this work is to explain how to apply perceptual concepts to define a perceptual pre-quantizer and to improve JPEG2000 compressor. The approach consists in quantizing wavelet transform coefficients using some of the human visual system behavior properties. Noise is fatal to image compression performance, because it can be both annoying for the observer and consumes excessive bandwidth when the imagery is transmitted. Perceptual pre-quantization reduces unperceivable details and thus improve both visual impression and transmission properties. The comparison between JPEG2000 without and with perceptual pre-quantization shows that the latter is not favorable in PSNR, but the recovered image is more compressed at the same or even better visual quality measured with a weighted PSNR. Perceptual criteria were taken from the CIWaM (Chromatic Induction Wavelet Model). |
| Address |
Joensuu, Finland |
| Corporate Author |
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Thesis |
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Place of Publication |
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Summary Language |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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ISBN |
9781617388897 |
Medium |
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| Area |
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Expedition |
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Conference |
CGIV/MCS |
| Notes |
CIC |
Approved |
no |
| Call Number |
CAT @ cat @ MOV2010a |
Serial |
1307 |
| Permanent link to this record |
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| Author |
Jaime Moreno; Xavier Otazu; Maria Vanrell |
| Title |
Contribution of CIWaM in JPEG2000 Quantization for Color Images |
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 |
132–136 |
| Keywords |
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| Abstract |
The aim of this work is to explain how to apply perceptual concepts to define a perceptual pre-quantizer and to improve JPEG2000 compressor. The approach consists in quantizing wavelet transform coefficients using some of the human visual system behavior properties. Noise is fatal to image compression performance, because it can be both annoying for the observer and consumes excessive bandwidth when the imagery is transmitted. Perceptual pre-quantization reduces unperceivable details and thus improve both visual impression and transmission properties. The comparison between JPEG2000 without and with perceptual pre-quantization shows that the latter is not favorable in PSNR, but the recovered image is more compressed at the same or even better visual quality measured with a weighted PSNR. Perceptual criteria were taken from the CIWaM(ChromaticInductionWaveletModel). |
| Address |
Gjovik (Norway) |
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Thesis |
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Summary Language |
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Series Issue |
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Edition |
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ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
CREATE |
| Notes |
CIC |
Approved |
no |
| Call Number |
CAT @ cat @ MOV2010b |
Serial |
1308 |
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| Author |
C. Alejandro Parraga; Ramon Baldrich; Maria Vanrell |
| Title |
Accurate Mapping of Natural Scenes Radiance to Cone Activation Space: A New Image Dataset |
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 |
50–57 |
| Keywords |
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| Abstract |
The characterization of trichromatic cameras is usually done in terms of a device-independent color space, such as the CIE 1931 XYZ space. This is indeed convenient since it allows the testing of results against colorimetric measures. We have characterized our camera to represent human cone activation by mapping the camera sensor's (RGB) responses to human (LMS) through a polynomial transformation, which can be “customized” according to the types of scenes we want to represent. Here we present a method to test the accuracy of the camera measures and a study on how the choice of training reflectances for the polynomial may alter the results. |
| Address |
Joensuu, Finland |
| Corporate Author |
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Thesis |
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Place of Publication |
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Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
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ISBN |
9781617388897 |
Medium |
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| Area |
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Expedition |
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Conference |
CGIV/MCS |
| Notes |
CIC |
Approved |
no |
| Call Number |
CAT @ cat @ PBV2010a |
Serial |
1322 |
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