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| Author | Francesc Tous; Maria Vanrell; Ramon Baldrich |
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| Title | Exploring Colour Constancy Solutions. | Type | Miscellaneous | |||
| Year | 2004 | Publication  |
CGIV 2004 Second European Conference on Colour in Graphics, Imaging, and Vision, 24:29 | Abbreviated Journal | ||
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| Address | Aachen (Germany) | |||||
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| Notes | CIC | Approved | no | |||
| Call Number | CAT @ cat @ TVB2004 | Serial | 452 | |||
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| Author | Xavier Otazu; Maria Vanrell |
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| Title | Building Perceived Colour Images. | Type | Miscellaneous | |||
| Year | 2004 | Publication |
CGIV 2004 Second European Conference on Colour in Graphics, Imaging, and Vision, 140:145 | Abbreviated Journal | ||
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| Address | Aachen (Germany) | |||||
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| Notes | CIC | Approved | no | |||
| Call Number | CAT @ cat @ OtV2004 | Serial | 450 | |||
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| Author | Robert Benavente; Maria Vanrell |
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| Title | Fuzzy Colour Naming Based on Sigmoid Membership Functions. | Type | Miscellaneous | |||
| Year | 2004 | Publication |
CGIV 2004 Second European Conference on Colour in Graphics, Imaging and Vision, 135:139 | Abbreviated Journal | ||
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| Address | Aachen (Germany) | |||||
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| Notes | CIC | Approved | no | |||
| Call Number | CAT @ cat @ BeV2004 | Serial | 441 | |||
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| Author | Eduard Vazquez; Francesc Tous; Ramon Baldrich; Maria Vanrell |
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| Title | n-Dimensional Distribution Reduction Preserving its Structure | Type | Book Chapter | |||
| Year | 2006 | Publication |
Artificial Intelligence Research and Development, M. Polit et al. (Eds.), 146: 167–175 | Abbreviated Journal | ||
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| Address | IOS Press | |||||
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| Notes | CIC | Approved | no | |||
| Call Number | CAT @ cat @ VTB2006a | Serial | 681 | |||
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| Author | Javier Vazquez; Maria Vanrell; Anna Salvatella; Eduard Vazquez |
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| Title | A colour space based on the image content | Type | Book Chapter | |||
| Year | 2007 | Publication |
Artificial Intelligence Research and Development, C. Angulo and L. Godo, pp 205–212 IOS Press | Abbreviated Journal | ||
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| Notes | CIC | Approved | no | |||
| Call Number | CAT @ cat @ VVS2007 | Serial | 829 | |||
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| Author | Aleksandr Setkov; Fabio Martinez Carillo; Michele Gouiffes; Christian Jacquemin; Maria Vanrell; Ramon Baldrich |
 
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| Title | DAcImPro: A Novel Database of Acquired Image Projections and Its Application to Object Recognition | Type | Conference Article | |||
| Year | 2015 | Publication |
Advances in Visual Computing. Proceedings of 11th International Symposium, ISVC 2015 Part II | Abbreviated Journal | ||
| Volume | 9475 | Issue | Pages | 463-473 | ||
| Keywords | Projector-camera systems; Feature descriptors; Object recognition | |||||
| Abstract | Projector-camera systems are designed to improve the projection quality by comparing original images with their captured projections, which is usually complicated due to high photometric and geometric variations. Many research works address this problem using their own test data which makes it extremely difficult to compare different proposals. This paper has two main contributions. Firstly, we introduce a new database of acquired image projections (DAcImPro) that, covering photometric and geometric conditions and providing data for ground-truth computation, can serve to evaluate different algorithms in projector-camera systems. Secondly, a new object recognition scenario from acquired projections is presented, which could be of a great interest in such domains, as home video projections and public presentations. We show that the task is more challenging than the classical recognition problem and thus requires additional pre-processing, such as color compensation or projection area selection. | |||||
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| Publisher | Springer International Publishing | Place of Publication | Editor | |||
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| Series Editor | Series Title | Abbreviated Series Title | LNCS | |||
| Series Volume | Series Issue | Edition | ||||
| ISSN | 0302-9743 | ISBN | 978-3-319-27862-9 | Medium | ||
| Area | Expedition | Conference | ISVC | |||
| Notes | CIC | Approved | no | |||
| Call Number | Admin @ si @ SMG2015 | Serial | 2736 | |||
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| Author | Robert Benavente; C. Alejandro Parraga; Maria Vanrell |
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| Title | La influencia del contexto en la definicion de las fronteras entre las categorias cromaticas | Type | Conference Article | |||
| Year | 2010 | Publication |
9th Congreso Nacional del Color | Abbreviated Journal | ||
| Volume | Issue | Pages | 92–95 | |||
| Keywords | Categorización del color; Apariencia del color; Influencia del contexto; Patrones de Mondrian; Modelos paramétricos | |||||
| Abstract | En este artículo presentamos los resultados de un experimento de categorización de color en el que las muestras se presentaron sobre un fondo multicolor (Mondrian) para simular los efectos del contexto. Los resultados se comparan con los de un experimento previo que, utilizando un paradigma diferente, determinó las fronteras sin tener en cuenta el contexto. El análisis de los resultados muestra que las fronteras obtenidas con el experimento en contexto presentan menos confusión que las obtenidas en el experimento sin contexto. | |||||
| Address | Alicante (Spain) | |||||
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| ISSN | ISBN | 978-84-9717-144-1 | Medium | |||
| Area | Expedition | Conference | CNC | |||
| Notes | CIC | Approved | no | |||
| Call Number | CAT @ cat @ BPV2010 | Serial | 1327 | |||
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| Author | Susana Alvarez; Anna Salvatella; Maria Vanrell; Xavier Otazu |
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| Title | 3D Texton Spaces for color-texture retrieval | Type | Conference Article | |||
| Year | 2010 | Publication |
7th International Conference on Image Analysis and Recognition | Abbreviated Journal | ||
| Volume | 6111 | Issue | Pages | 354–363 | ||
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| Abstract | Color and texture are visual cues of different nature, their integration in an useful visual descriptor is not an easy problem. One way to combine both features is to compute spatial texture descriptors independently on each color channel. Another way is to do the integration at the descriptor level. In this case the problem of normalizing both cues arises. In this paper we solve the latest problem by fusing color and texture through distances in texton spaces. Textons are the attributes of image blobs and they are responsible for texture discrimination as defined in Julesz’s Texton theory. We describe them in two low-dimensional and uniform spaces, namely, shape and color. The dissimilarity between color texture images is computed by combining the distances in these two spaces. Following this approach, we propose our TCD descriptor which outperforms current state of art methods in the two different approaches mentioned above, early combination with LBP and late combination with MPEG-7. This is done on an image retrieval experiment over a highly diverse texture dataset from Corel. | |||||
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| Publisher | Springer Berlin Heidelberg | Place of Publication | Editor | A.C. Campilho and M.S. Kamel | ||
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| Series Editor | Series Title | Abbreviated Series Title | LNCS | |||
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| ISSN | 0302-9743 | ISBN | 978-3-642-13771-6 | Medium | ||
| Area | Expedition | Conference | ICIAR | |||
| Notes | CIC | Approved | no | |||
| Call Number | CAT @ cat @ ASV2010a | Serial | 1325 | |||
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| Author | Jordi Roca; Maria Vanrell; C. Alejandro Parraga |
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| Title | What is constant in colour constancy? | Type | Conference Article | |||
| Year | 2012 | Publication |
6th European Conference on Colour in Graphics, Imaging and Vision | Abbreviated Journal | ||
| Volume | Issue | Pages | 337-343 | |||
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| Abstract | Color constancy refers to the ability of the human visual system to stabilize
the color appearance of surfaces under an illuminant change. In this work we studied how the interrelations among nine colors are perceived under illuminant changes, particularly whether they remain stable across 10 different conditions (5 illuminants and 2 backgrounds). To do so we have used a paradigm that measures several colors under an immersive state of adaptation. From our measures we defined a perceptual structure descriptor that is up to 87% stable over all conditions, suggesting that color category features could be used to predict color constancy. This is in agreement with previous results on the stability of border categories [1,2] and with computational color constancy algorithms [3] for estimating the scene illuminant. |
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| ISSN | ISBN | 9781622767014 | Medium | |||
| Area | Expedition | Conference | CGIV | |||
| Notes | CIC | Approved | no | |||
| Call Number | RVP2012 | Serial | 2189 | |||
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| Author | C. Alejandro Parraga; Ramon Baldrich; Maria Vanrell |
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| 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 | ||
| Volume | Issue | Pages | 50–57 | |||
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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 | |||||
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| ISSN | ISBN | 9781617388897 | Medium | |||
| Area | Expedition | Conference | CGIV/MCS | |||
| Notes | CIC | Approved | no | |||
| Call Number | CAT @ cat @ PBV2010a | Serial | 1322 | |||
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| Author | Javier Vazquez; G. D. Finlayson; Maria Vanrell |
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| Title | A compact singularity function to predict WCS data and unique hues | 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 | ||
| Volume | Issue | Pages | 33–38 | |||
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| Abstract | Understanding how colour is used by the human vision system is a widely studied research field. The field, though quite advanced, still faces important unanswered questions. One of them is the explanation of the unique hues and the assignment of color names. This problem addresses the fact of different perceptual status for different colors.
Recently, Philipona and O'Regan have proposed a biological model that allows to extract the reflection properties of any surface independently of the lighting conditions. These invariant properties are the basis to compute a singularity index that predicts the asymmetries presented in unique hues and basic color categories psychophysical data, therefore is giving a further step in their explanation. In this paper we build on their formulation and propose a new singularity index. This new formulation equally accounts for the location of the 4 peaks of the World colour survey and has two main advantages. First, it is a simple elegant numerical measure (the Philipona measurement is a rather cumbersome formula). Second, we develop a colour-based explanation for the measure. |
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| Address | Joensuu, Finland | |||||
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| ISSN | ISBN | 9781617388897 | Medium | |||
| Area | Expedition | Conference | CGIV/MCS | |||
| Notes | CIC | Approved | no | |||
| Call Number | CAT @ cat @ VFV2010 | Serial | 1324 | |||
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| Author | Jaime Moreno; Xavier Otazu; Maria Vanrell |
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| 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 | ||
| Volume | Issue | Pages | 255–260 | |||
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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 | |||||
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| ISSN | ISBN | 9781617388897 | Medium | |||
| Area | Expedition | Conference | CGIV/MCS | |||
| Notes | CIC | Approved | no | |||
| Call Number | CAT @ cat @ MOV2010a | Serial | 1307 | |||
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| Author | Francesc Tous; Agnes Borras; Robert Benavente; Ramon Baldrich; Maria Vanrell; Josep Llados |
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| 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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| 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 | Javier Vazquez; Maria Vanrell; Ramon Baldrich |
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| 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 | ||
| Volume | Issue | Pages | 372–377 | |||
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| Address | Terrassa (Spain) | |||||
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| Area | Expedition | Conference | CGIV08 | |||
| Notes | CAT;CIC | Approved | no | |||
| Call Number | CAT @ cat @ VVB2008a | Serial | 968 | |||
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