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2011 Report Unknown
Enhancement of LDR videos using HDR devices
Banterle Francesco, Dellepiane Matteo, Scopigno Roberto
In this paper, we present a novel technique for enhancing the dynamic range of LDR videos using HDR videos or photographs. In particular our technique can be used for two setups. In the first one, the two devices shares the same capturing lens. In the second setup, devices are coupled in a stereo rig.Source: ISTI Technical reports, 2011

See at: CNR ExploRA


2010 Report Unknown
Backward compatible efficient compression of HDR content
Banterle F., Corsini M., Scopigno R.
In this paper, we present a novel compression framework for achieving high compression rates for HDR videos and images. The method is based on a zonal system which allows to compress effi- ciently and keep backward compatibility with classic LDR content.Source: ISTI Technical reports, 2010

See at: CNR ExploRA


2015 Software Unknown
Piccante
Banterle F., Benedetti L.
Piccante is a header-only C++11 open-source (MPL license v2.0) imaging library, specifically designed for High Dynamic Range (HDR) processing. Piccante is modular; this means new filters, algorithms, etc. can be added in a straightforward way to its core. Piccante is easy to use and to integrate in existing projects; to use Piccante you just need to include "piccante.hpp" in your project.

See at: piccantelib.net | CNR ExploRA


2013 Conference article Open Access OPEN
Real-time high fidelity inverse tone mapping for low dynamic range content
Banterle F., Chalmers A., Scopigno R.
In this paper, we present a novel parallel implementation of a high fidelity inverse tone mapping operator. Our method makes use of point based graphics to accelerate density estimation, and multi-core CPUs for extracting light sources. We show that our method can achieve real-time performance on a lower-end graphics card, with minimum loss of quality.Source: EG2013 - 34th Annual Conference of the European Association for Computer Graphics, pp. 41–44, Girona, Spain, 6-10 May 2013
DOI: 10.2312/conf/eg2013/short/041-044
Metrics:


See at: CNR ExploRA


2016 Journal article Open Access OPEN
A gamut-mapping framework for color-accurate reproduction of HDR images
Sikudova E., Pouli T., Artusi A., Akyuz A. O., Banterle F., Mazlumoglu Z. M., Reinhard E.
An integrated gamut- and tone-management framework for color-accurate reproduction of high dynamic range images can prevent hue and luminance shifts while taking gamut boundaries into consideration. The proposed approach is conceptually and computationally simple, parameter-free, and compatible with existing tone-mapping operators.Source: IEEE computer graphics and applications 36 (2016): 78–90. doi:10.1109/MCG.2015.116
DOI: 10.1109/mcg.2015.116
DOI: 10.48550/arxiv.1711.08925
Project(s): PARTHENOS via OpenAIRE
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See at: arXiv.org e-Print Archive Open Access | IEEE Computer Graphics and Applications Open Access | Recolector de Ciencia Abierta, RECOLECTA Open Access | ISTI Repository Open Access | IEEE Computer Graphics and Applications Restricted | doi.org Restricted | gateway.webofknowledge.com Restricted | ieeexplore.ieee.org Restricted | CNR ExploRA


2017 Contribution to book Closed Access
Creating HDR video using retargeting
Banterle F., Unger J.
This chapter presented an overview of two methods for augmenting SDR video sequences with HDR information in order to create HDR videos. The goal of the two methods is to fill in saturated regions in the SDR video frames by retargeting non-saturated image data from a sparse set of HDR images.Source: High Dynamic Range Video: Concepts, Technologies and Applications, edited by Chalmers, A.; Campisi, P.; Shirley, P.; Olaizola, I., pp. 45–59, 2017
DOI: 10.1016/b978-0-12-809477-8.00002-9
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See at: doi.org Restricted | www.sciencedirect.com Restricted | CNR ExploRA


2011 Contribution to conference Restricted
High dynamic range images for enhancing low dynamic range content
Banterle Francesco, Dellepiane Matteo, Scopigno Roberto
This poster presents a practical system for enhancing the quality of Low Dynamic Range (LDR) videos using High Dynamic Range (HDR) background images. Our technique relies on the assumption that the HDR information is static in the video footage. This assumption can be valid in many scenarios where moving subjects are the main focus of the footage and do not have to interact with moving light sources or highly reflective objects. Another valid scenario is teleconferencing via webcams, where the background is typically over-exposed, not allowing the users to perceive correctly the environment where the communication is happening.Source: The 4th ACM Siggraph Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia, ACM SIGGRAPH ASIA, pp. 1, Hong Kong, PCR, 12-15 Dicembre 2011
DOI: 10.1145/2073304.2073351
Project(s): 3D-COFORM via OpenAIRE
Metrics:


See at: dl.acm.org Restricted | doi.org Restricted | CNR ExploRA


2011 Report Unknown
Tone mapping for stereo and multi-view HDR content
Banterle Francesco, Callieri Marco, Dellepiane Matteo, Scopigno Roberto
In this paper, we present a novel technique for tone mapping which tackles stereo and multi-view HDR content. Stereo and multi-view image processing is not a trivial task in order to avoid inconsistencies in colors and on the whole appearance in the final results. Our method, for minimizing inconsistencies which appear if images are processed separately, leverages on filtering stereo images in the disparity space. We show that this filtering minimize inconsistencies allowing a pleasant fruition of the stereo content on LDR displays. Finally, we show how to extend this method to multi-view images.Source: ISTI Technical reports, 2011

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2015 Conference article Restricted
LecceAR: an augmented reality App
Banterle F., Cardillo F. A., Malomo L., Pingi P., Gabellone F., Amato G., Scopigno R.
This paper discusses a case study on the use of augmented reality (AR) within the context of cultural heritage. We implemented an iOS app for markerless AR that will be exhibited at the MUST museum in Lecce, Italy. The app shows a rich 3D reconstruction of the Roman amphitheater, which is nowadays only partially visible. The use of state-of-the-art algorithms in computer graphics and computer vision allows the viewing and the exploration of the ancient theater in real-time.Source: DiPP2015 - Digital Presentation and Preservation of Cultural and Scientific Heritage. International Conference, pp. 99–108, Veliko Tarnovo, Bulgaria, 28-30 September 2015

See at: www.ceeol.com Restricted | CNR ExploRA


2011 Conference article Restricted
Enhancement of low dynamic range videos using highdynamic range backgrounds
Banterle F., Dellepiane M., Scopigno R.
In this paper, we present a practical system for enhancing the quality of Low Dynamic Range (LDR) videos using High Dynamic Range (HDR) background images. Our technique relies on the assumption that the HDR information is static in the video footage. This assumption can be valid in many scenarios where moving subjects are the main focus of the footage and do not have to interact with moving light sources or highly reflective objects. Another valid scenario is teleconferencing via webcams, where the background is typically over-exposed, not allowing the users to perceive correctly the environment where the communication is happening.Source: Eurographics 2011, pp. 57–62, Llandudno, UK, 11-15 April 2011
Project(s): 3D-COFORM via OpenAIRE

See at: vcg.isti.cnr.it Restricted | CNR ExploRA


2011 Journal article Restricted
A survey of specularity removal methods
Artusi, A., Banterle, F., Chetverikov D.
The separation of reflection components is an important issue in computer graphics, computer vision and image processing. It provides useful information for the applications that need consistent object surface appearance, such as stereo reconstruction, visual recognition, tracking, objects re-illumination and dichromatic editing. In this paper we will present a brief survey of recent advances in separation of reflection components, also known as specularity (highlights) removal. Several techniques that try to tackle the problem from different points of view have been proposed so far. In this survey, we will overview these methods and we will present a critical analysis of their benefits and drawbacks.Source: Computer graphics forum (Online) 30 (2011): 2208–2230. doi:10.1111/j.1467-8659.2011.01971.x
DOI: 10.1111/j.1467-8659.2011.01971.x
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See at: Computer Graphics Forum Restricted | CNR ExploRA


2011 Report Open Access OPEN
A parallel architecture for interactive rendering of scattering and refraction effects
Bernabei D., Hakke Patil A., Banterle F., Di Benedetto M., Ganovelli F., Pattanaik S., Scopigno R.
We present a new algorithm for the interactive rendering of complex lighting effects inside heterogeneous materials. Our approach combines accurate tracing of the light rays in heterogeneous refractive medium to compute high frequency phenomena, with a lattice-Boltzmann method to account for low-frequency multiple scattering effects. The presented technique is designed for parallel execution of these two algorithms on modern graphics hardware. In our solution, light marches from the sources into the medium, taking into account refraction, scattering and absorption. During the marching of the light rays inside the volumetric representation of the scene, irradiance is accumulated and it is diffused with the lattice-Boltzmann method to produce multiple scattering effects.Source: ISTI Technical reports, 2011

See at: ISTI Repository Open Access | CNR ExploRA


2012 Conference article Restricted
BoostHDR: a novel backward-compatible method for HDR images
Banterle F., Scopigno R.
In this paper, we present BoostHDR, a novel method for compressing high dynamic range (HDR) images. The algorithm leverages on a novel segmentation-based tone mapping operator (TMO) which relaxes the no seams constraint. Our method can work with both JPEG and JPEG2000 encoders. Moreover, it provides better results compared to the state of the art in HDR images compression algorithms in terms of bit per pixels (bpp), and visual quality using objective metrics.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.Source: Applications of Digital Image Processing XXXV, San Diego, CA, USA, 12 August 2012
DOI: 10.1117/12.931504
Project(s): 3D-COFORM via OpenAIRE
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See at: doi.org Restricted | proceedings.spiedigitallibrary.org Restricted | CNR ExploRA


2012 Journal article Restricted
A parallel architecture for interactively rendering scattering and refraction effects
Bernabei D., Hakke-Patil A., Banterle F., Di Benedetto M., Ganovelli F., Pattanaik S., Scopigno R.
A new method for interactive rendering of complex lighting effects combines two algorithms. The first performs accurate ray tracing in heterogeneous refractive media to compute high-frequency phenomena. The second applies lattice-Boltzmann lighting to account for low-frequency multiple-scattering effects. The two algorithms execute in parallel on modern graphics hardware. This article includes a video animation of the authors' real-time algorithm rendering a variety of scenesSource: IEEE computer graphics and applications (Online) 32 (2012): 34–43. doi:10.1109/MCG.2011.106
DOI: 10.1109/mcg.2011.106
Project(s): 3D-COFORM via OpenAIRE
Metrics:


See at: IEEE Computer Graphics and Applications Restricted | ieeexplore.ieee.org Restricted | CNR ExploRA


2013 Conference article Unknown
Color correction for tone reproduction
Pouli T., Artusi A., Banterle F., Akyuz A. O., Seidel H., Reinhard E.
High dynamic range images require tone reproduction to match the range of values to the capabilities of the display. For computational reasons as well as absence of fully calibrated imagery, rudimentary color reproduction is often added as a post processing step rather than integrated into the tone reproduction algorithm. However, in the general case this currently requires manual parameter tuning, although for some global tone reproduction operators, parameter settings can be inferred from the tone curve. We present a novel and fully automatic saturation correction technique, suitable for any tone reproduction operator, which exhibits better color reproduction than the state-of the-art and we validate its comparative effectiveness through psychophysical experimentation.Source: CIC21 - Twenty-first Color and Imaging Conference, pp. 215–220, Albuquerque, New Mexico, USA, 4-8 November 2013

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2011 Book Unknown
Advanced high dynamic range imaging: theory and practice
Banterle F., Artusi A., Debattista K., Chalmers A.
This book is a practical introduction to the emerging new field of High Dynamic Range Imaging that combines photography, computer vision, and computer graphics. The book provides detailed equations and Matlab code. This allows the reader to have the tools for experimenting with HDR Imaging for producing compelling images. The book is divided in the following chapters: -Introduction (a brief introduction on light, human vision, and color spaces) -HDR Pipeline (including capturing, storing formats, and HDR monitors) -Tone Mapping -Expansion Operators for Low Dynamic Range Content (Inverse/Reverse Tone Mapping) -Image-Based Lighting -Evaluation of Tone Mapping and Expansion Operators -HDR Content Compressiong (images, textures, and videos) The book provides three appendecies on the Bilateral Filter, Retinex Filters, and how to use the HDR Toolbox for Matlab.

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2014 Conference article Unknown
Dynamic range expansion of video sequences: a subjective quality assessment study
De Simone F., Valenzise G., Paul L., Dufaux F., Banterle F.
The goal of this paper is to assess whether existing solutions to expand low dynamic range (LDR) still images to high dynamic range (HDR) displays can apply to moving pictures. To this end, we conduct a subjective quality assessment test on four state-of-the-art expansion operators, using high-quality input LDR content. Our results show that, perhaps surprisingly, no temporal artifacts, such as flickering due to global illumination changes, are introduced applying frame-based algorithms. In addition, they confirm previous studies in that operators as simple as linear expansion can yield acceptable (or even excellent) quality of the HDR video.Source: The 2nd IEEE Global Conference on Signal and Information Processing, pp. 1231–1235, Atlanta, Georgia, USA, 3-5 December 2014

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2015 Conference article Open Access OPEN
Compression and querying of arbitrary geodesic distances
Aiello R., Banterle F., Pietroni N., Malomo L., Cignoni P., Scopigno R.
In this paper, we propose a novel method for accelerating the computation of geodesic distances over arbitrary manifold triangulated surfaces. The method is based on a preprocessing step where we build a data structure. This allows to store arbitrary complex distance metrics. We show that, by exploiting the precomputed data, the proposed method is significantly faster than the classical Dijkstra algorithm for the computation of point to point distances. Moreover, as we precompute exact geodesic distances, the proposed approach can be more accurate than state-of-the-art approximations.Source: Image Analysis and Processing. 18th International Conference, ICIAP 2015, pp. 282–293, Genoa, Italy, 7-11/09/2015
DOI: 10.1007/978-3-319-23231-7_26
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See at: link.springer.com Open Access | ISTI Repository Open Access | vcg.isti.cnr.it Open Access | doi.org Restricted | CNR ExploRA


2015 Conference article Restricted
Capturing reality for computer graphics applications
Unger J., Gardner A., Larsson P., Banterle F.
This course covers algorithms and tools for measuring, calibrating, and registering the information required to build models of real scenes with the intent of photo-realistic image synthesis. We focus on the pipeline, i.e. how it all its together, and practical artist-driven methods and algorithms for capturing and fusing all captured data into a VPS: a geometric 3D-model of the scene, the lighting (radiance distribution) in the scene, and information describing the materials (color, reflectance and texture) of objects within the scene so that photo-realistic renderings of virtual objects can be produced.Source: SA '15 - SIGGRAPH Asia 2015 Courses, Kobe, Japan, 2-5 November 2015
DOI: 10.1145/2818143.2818160
Metrics:


See at: dl.acm.org Restricted | doi.org Restricted | CNR ExploRA


2016 Book Unknown
Image Content Retargeting: Maintaining Color, Tone, and Spatial Consistency
Artusi A., Banterle F., Aydin T. O., Panozzo D., Sorkine-Hornung O.
In recent years visual devices have proliferated, from the massive high-resolution, high-contrast screens to the tiny ones on mobile phones, with their limited dynamic range and color gamut. The wide variety of screens on which content may be viewed creates a challenge for developers. Adapting visual content for optimized viewing on all devices is called retargeting. This is the first book to provide a holistic view of the subject, thoroughly reviewing and analyzing the many techniques that have been developed for retargeting along dimensions such as color gamut, dynamic range, and spatial resolution.

See at: CNR ExploRA