@article{brandstetter-2008-rbf, title = "Radial Basis Function Networks GPU Based Implementation", author = "Andreas Brandstetter and Alessandro Artusi", year = "2008", month = dec, issn = "1045-9227", journal = "IEEE Transaction on Neural Network", number = "12", volume = "19", pages = "2150--2161", URL = "https://www.cg.tuwien.ac.at/research/publications/2008/brandstetter-2008-rbf/", } @article{CADIK-2008-EHD, title = "Evaluation of HDR Tone Mapping Methods Using Essential Perceptual Attributes", author = "Martin \v{C}ad\'{i}k and Michael Wimmer and L\'{a}szl\'{o} Neumann and Alessandro Artusi", year = "2008", abstract = "The problem of reproducing high dynamic range images on devices with restricted dynamic range has gained a lot of interest in the computer graphics community. There exist various approaches to this issue, which span several research areas including computer graphics, image processing, color vision, physiological aspects, etc. These approaches assume a thorough knowledge of both the objective and subjective attributes of an image. However, no comprehensive overview and analysis of such attributes has been published so far. In this contribution, we present an overview about the effects of basic image attributes in HDR tone mapping. Furthermore, we propose a scheme of relationships between these attributes, leading to the definition of an overall image quality measure. We present results of subjective psychophysical experiments that we have performed to prove the proposed relationship scheme. Moreover, we also present an evaluation of existing tone mapping methods (operators) with regard to these attributes. Finally, the execution of with-reference and without a real reference perceptual experiments gave us the opportunity to relate the obtained subjective results. Our effort is not just useful to get into the tone mapping field or when implementing a tone mapping method, but it also sets the stage for well-founded quality comparisons between tone mapping methods. By providing good definitions of the different attributes, user-driven or fully automatic comparisons are made possible. ", month = jun, issn = "0097-8493", journal = "Computers & Graphics", number = "3", volume = "32", pages = "330--349", keywords = "high dynamic range, tone mapping operators, tone mapping evaluation, image attributes", URL = "https://www.cg.tuwien.ac.at/research/publications/2008/CADIK-2008-EHD/", } @article{neumann-2006-gamma, title = "Accurate Display Gamma Functions based on Human Observation", author = "Attila Neumann and Alessandro Artusi and L\'{a}szl\'{o} Neumann and Georg Zotti and Werner Purgathofer", year = "2007", abstract = "This paper describes an accurate method to obtain the Tone Reproduction Curve (TRC) of display devices without using a measurement device. It is an improvement of an existing technique based on human observation, solving its problem of numerical instability and resulting in functions in log--log scale which correspond better to the nature of display devices. We demonstrate the effiency of our technique on different monitor technologies, comparing it with direct measurements using a spectrophotometer.", issn = "0361-2317", journal = "Color Research & Applications", note = "2006 angenommen, 2007 erschienen", number = "4", volume = "32", pages = "310--319", keywords = "Generalized Gamma Function, Colour Reproduction, Display Measurement, Human Visual System, Spatial Vision", URL = "https://www.cg.tuwien.ac.at/research/publications/2007/neumann-2006-gamma/", } @inproceedings{CADIK-2006-IAQ, title = "Image Attributes and Quality for Evaluation of Tone Mapping Operators", author = "Martin \v{C}ad\'{i}k and Michael Wimmer and L\'{a}szl\'{o} Neumann and Alessandro Artusi", year = "2006", abstract = "The problem of reproducing high dynamic range images on devices with restricted dynamic range has gained a lot of interest in the computer graphics community. There exist various approaches to this issue, which span several research areas including computer graphics, image processing, color science, physiology, neurology, psychology, etc. These approaches assume a thorough knowledge of both the objective and subjective attributes of an image. However, no comprehensive overview and analysis of such attributes has been published so far. In this paper, we present an overview of image quality attributes of different tone mapping methods. Furthermore, we propose a scheme of relationships between these attributes, leading to the definition of an overall image quality measure. We present results of subjective psychophysical tests that we have performed to prove the proposed relationship scheme. We also present the evaluation of existing tone mapping methods with regard to these attributes. Our effort is not just useful to get into the tone mapping field or when implementing a tone mapping operator, but it also sets the stage for well-founded quality comparisons between tone mapping operators. By providing good definitions of the different attributes, user-driven or fully automatic comparisons are made possible at all.", month = oct, publisher = "National Taiwan University Press", location = "Taipe, Taiwan", booktitle = "Proceedings of Pacific Graphics 2006 (14th Pacific Conference on Computer Graphics and Applications)", pages = "35--44", keywords = "tone mapping evaluation, tone mapping, high-dynamic range images", URL = "https://www.cg.tuwien.ac.at/research/publications/2006/CADIK-2006-IAQ/", } @article{artusi-2006-sut, title = "Speed-up Technique for a Local Automatic Color Equalization Model", author = "Alessandro Artusi and C Gatta and D Marini and Werner Purgathofer and A Rizzi", year = "2006", issn = "0167-7055", journal = "Computer Graphics Forum", number = "1", volume = "25", pages = "5--14", URL = "https://www.cg.tuwien.ac.at/research/publications/2006/artusi-2006-sut/", } @techreport{Neumann-2004-HOB, title = "Human Observation Based Generalized Gamma Functions", author = "Attila Neumann and Alessandro Artusi and L\'{a}szl\'{o} Neumann and Georg Zotti and Werner Purgathofer", year = "2004", abstract = "This paper describes an accurate method to obtain the Tone Reproduction Curve (TRC) of display devices without using a measurement device. It is an improvement of an existing technique based on human observation, solving its problem of numerical instability and resulting in functions in log--log scale which correspond better to the nature of display devices. We demonstrate the effiency of our technique on different monitor technologies, comparing it with direct measurements using a spectrophotometer.", month = dec, number = "TR-186-2-04-13", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "Display Measurement, Human Visual System, Spatial Vision", URL = "https://www.cg.tuwien.ac.at/research/publications/2004/Neumann-2004-HOB/", } @inproceedings{neumann-2004-ipm, title = "Interactive Perception Based Model for Characterization of Display device", author = "Attila Neumann and Alessandro Artusi and Georg Zotti and L\'{a}szl\'{o} Neumann and Werner Purgathofer", year = "2004", abstract = "This paper describes a simple to use, yet accurate way to obtain the Tone Reproduction Curve (TRC) of display devices without the use of a measurement device. Human vision is used to compare a series of dithered color patches against interactively changeable homogeneously colored display areas. Results comparing this method with spectrophotometer measurements are given for three monitors.", month = jan, isbn = "0819451967", organization = "IST&SPIE", location = "San Jose, California, USA", booktitle = "Color Imaging IX: Processing, Hardcopy, and Applications IX", keywords = "Display Measurement, Human Visual System", URL = "https://www.cg.tuwien.ac.at/research/publications/2004/neumann-2004-ipm/", } @phdthesis{Artusi-thesis, title = "Real time tone Mapping", author = "Alessandro Artusi", year = "2004", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", school = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", URL = "https://www.cg.tuwien.ac.at/research/publications/2004/Artusi-thesis/", } @misc{meseth-2004-hqr, title = "High Quality Rendering of Reflectance Data", author = "Jan Meseth and Gero M\"{u}ller and Mirko Sattler and Ralf Sarlette and Alessandro Artusi and Alexander Wilkie and Georg Zotti and Klein Reinhard and Werner Purgathofer", year = "2004", abstract = "The tutorial will introduce the basic terminology, show techniques for acquisition of reflectance properties of both synthetic and real-world materials, present common representations for reflectance properties and will elaborate on rendering techniques both for real-time and offline applications. While the tutorial gives an overview over existing techniques for most aspects, selected topics will be described in much more detail. In addition to describing acquisition, storage and rendering of reflectance properties, related areas will be covered. In fact, texturing and parameterization, texture- and BTF synthesis and tone mapping represent techniques which are inevitable to achieve really photorealistic results and are therefore required by every system that aims at using reflectance properties. Here, as well, an overview over the research areas will be given, existing techniques will de described and selected topics will be elaborated on in more detail. ", note = "Tutorial auf CGI 2004", URL = "https://www.cg.tuwien.ac.at/research/publications/2004/meseth-2004-hqr/", } @article{Artusi-2003-Col, title = "Novel Colour Printer Characterization Model", author = "Alessandro Artusi and Alexander Wilkie", year = "2003", abstract = "A key problem in multimedia systems is the faithful reproduction of color. One of the main reasons why this is a complicated issue are the different color reproduction technologies used by the various devices; displays use easily modeled additive color mixing, while printers use a subtractive process, the characterization of which is much more complex than that of self--luminous displays. In order to resolve these problems several processing steps are necessary, one of which is accurate device characterization. Our study examines different learning algorithms for one particular neural network technique which already has been found to be useful in related contexts -- namely radial basis function network models -- and proposes a modified learning algorithm which improves the colorimetric characterization process of printers. In particular our results show that is possible to obtain good performance by using a learning algorithm that is trained on only small sets of color samples, and use it to generate a larger look--up table (LUT) through use of multiple polynomial regression or an interpolation algorithm. We deem our findings to be a good start point for further studies on learning algorithms used in conjunction with this problem.", month = jul, issn = "1017-9909", journal = "Journal of Electronic Imaging", number = "3", volume = "12", pages = "448--458", keywords = "neural network, Colorimetric characterization, Radial basis function", URL = "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Col/", } @article{Artusi-2003-CCG, title = "L’importanza del Colore in Computer Graphics", author = "Alessandro Artusi", year = "2003", abstract = "Il colore rappresenta un’importante caratteristica, della realt\'{a}, di particolare interesse per molte applicazioni come: fotografia e stampa digitale, computer graphics, film restoration, color science ecc. Nonostante questo, molto spesso non viene presa in considerazione nel modo adeguato. La conseguenza di questo, \'{e} una rappresentazione non corretta della scena, dal punto di vista qualitativo, che molto spesso non \'{e} adeguata per gli scopi prefissati. La Computer Graphics, \'{e} una di quelle applicazioni in cui la componente colore \'{e} di particolare importanza. Ma per molto tempo una sua non corretta rappresentazione \'{e} stata usata. Solo negli ultimi anni sono state intorodotte diverse metodologie, gi\'{a} in uso in Colore Science. In questo articolo verr\'{a} presentato il processo di integrazione della componente colore in Computer Graphics, e i suoi aspetti importanti.", month = jul, journal = "DDD_IL COLORE Rivista trimestrale Disegno e Design Digitale", number = "5", volume = "2", keywords = "Colorimetric characterization, Computer Graphics, Colour, Gamut Mapping", URL = "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-CCG/", } @inproceedings{Artusi-2003-Del, title = "Delivering Interactivity to Complex Tone Mapping Operators", author = "Alessandro Artusi and Jir\'{i} Bittner and Michael Wimmer and Alexander Wilkie", year = "2003", abstract = "The accurate display of high dynamic range images requires the application of complex tone mapping operators. These operators are computationally costly, which prevents their usage in interactive applications. We propose a general framework that delivers interactive performance to an important subclass of tone mapping operators, namely global tone mapping operators. The proposed framework consists of four steps: sampling the input image, applying the tone mapping operator, tting the point-sampled tone mapping curve, and reconstructing the tone mapping curve for all pixels of the input image. We show how to make use of recent graphics hardware while keeping the advantage of generality by performing tone mapping in software. We demonstrate the capabilities of our method by accelerating several common global tone mapping operators and integrating the operators in a real-time rendering application.", month = jun, isbn = "3-905673-03-7", publisher = "Eurographics Association", organization = "Eurographics", location = "Leuven, Belgium", editor = "Per Christensen and Daniel Cohen-Or", booktitle = "Rendering Techniques 2003 (Proceedings Eurographics Symposium on Rendering)", pages = "38--44", URL = "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Del/", } @talk{artusi-2003-int, title = "Delivering Interactivity to Complex Tone Mapping Operations", author = "Alessandro Artusi", year = "2003", event = "EGSR Leuven", URL = "https://www.cg.tuwien.ac.at/research/publications/2003/artusi-2003-int/", } @techreport{Artusi-2002-NRE, title = "New Realistic Tone mapping Algorithm", author = "Alessandro Artusi and Alexander Wilkie", year = "2002", abstract = "To properly reproduce a highy dynamic range image on a graphic display system is a harder problem than is commonly acknowledged. The last years have seen great progress in this area, and for non-interactive tone mapping problems adequate levels of realism have already been demonstrated, namely through the multiscale model of adaptation of Pattanaik et al.. Unfortunately, the high computational cost of their methods has so far precluded their use for the purposes of real-time rendering, and they have also been confined to single images without a temporal dependency. Conversely, the work of Tumblin et al. have demonstrated time dependency and interactivity for tone mapping techniques, but at the cost of significantly reduced realism. In this report we present a new high-quality time-dependent tone mapping algorithm which is comparable to the work of Pattanaik et al. in terms of visual realism, and demonstrate its viability on a number of test scenes.", month = feb, number = "TR-186-2-02-03", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "Human Visual system, Color sensitivity, Visual acuity, Glare, Time-Dependency", URL = "https://www.cg.tuwien.ac.at/research/publications/2002/Artusi-2002-NRE/", } @techreport{Artusi-2002-NRT, title = "New Real-Time Tone mapping Algorithm", author = "Alessandro Artusi and Alexander Wilkie", year = "2002", abstract = "The conversion from real-world to display luminance is known as tone-mapping, and the goals of the so-called tone mapping operator are to reproduce visibility and the overall impression of brightness, contrast and color. To truly realize this means to employ a very complex algorithm that exactly simulates how the human visual system is working. Due to its complexity, such a simulation cannot be used inside a real-time application. This means that realistic tone mapping models so far could not be used in interactive rendering applications, and that one had to resort to simpler, less convincing techniques in this case. We demostrate a new approach with which it is finally possible to use a realistic tone mapping model in a real time.", month = jan, number = "TR-186-2-02-02", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "Texture Mapping, Rendering Systems, Reflectance & Shading Models, Image-Based Rendering, Graphics Systems, Computer Vision, Color", URL = "https://www.cg.tuwien.ac.at/research/publications/2002/Artusi-2002-NRT/", } @techreport{Artusi-2001-NTD, title = "New Time-Dependent Tone mapping Algorithm", author = "Alessandro Artusi and Christian Faisstnauer and Alexander Wilkie", year = "2001", abstract = "In this report we present a new time-dependent tone mapping model which describes the ability of the human vision to adapt to even strong changes in the luminance of the surroundings. This ability depends on time; in fact the human visual system needs a determined amount of time until reaching the final stage of adaptation. Our model accepts the CIEXYZ values of an image as input and converts them into RGB values reproducible on a monitor. This work is based on the retinal model presented by Pattanaik et al. , but introducing substantial modifications. In fact, we define a new dynamic model which describes the time dependence of the human visual system, utilizing different filters; the cromatic adaptation is taken into account by introducing the model of von Kries. Furthermore, we introduce new techniques of gamut mapping and conversion between the values of retinal response and luminance of the display.", month = nov, number = "TR-186-2-01-21", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "colours, chromatic adaptation, appearance model, time-dependence, visual adaptation", URL = "https://www.cg.tuwien.ac.at/research/publications/2001/Artusi-2001-NTD/", } @inproceedings{Artusi-2001-Col, title = "Color Printer Characterization Using Radial Basis Function Networks", author = "Alessandro Artusi and Alexander Wilkie", year = "2001", abstract = "Colorimetric characterization is one step in the colorimetric reproduction process that permits faithful image reproduction across different devices. Its goal is to define a mapping function between the device--dependent color spaces in question (such as RGB or CMYK) and device--independent colour spaces (such as CIELAB or CIEXYZ), and vice versa. The work presented in this paper is an application study of utilizing radial basis function networks for the problem of colorimetric characterization of printer devices. The work we present is novel in seven ways: to begin with, this is the first work that uses radial basis function networks to resolve the colorimetric characterization of printers. Second, we used a new learning model to train such networks; our approach is based on a proposal by Carozza. Third, we use only 125 measured samples for the training of the network. Fourth, the computational costs for this training are very low when compared to previous techniques and allow to use this model in consumer products. Fifth, it is a general model which one can also use to define other transformations between color spaces. Sixth, it is possible to have a fast recharacterization of the device because the computational cost of the training phase and the number of training samples are low. Finally, it improves on the performance of multiple polynomials regression and tetrahedral interpolation. ", month = jan, isbn = "0-8194-3978-9", publisher = "SPIE", note = "SPIE Conference, San Jose California, January 2001", location = "San Jose (USA)", booktitle = "Proceedings Colour Imaging Conference: Device-Independent Colour, Colour Hardcopy, and Graphics Arts VI, IST&SPIE, Electronic Imaging", pages = "70--80", keywords = "neural network, Colorimetric characterization", URL = "https://www.cg.tuwien.ac.at/research/publications/2001/Artusi-2001-Col/", }