2013
Conference article
Open Access
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:
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
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
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
See at: CNR ExploRA
2013
Journal article
Open Access
EnvyDepth: an interface for recovering local natural illumination from environment maps
Banterle F., Callieri M., Dellepiane M., Corsini M., Pellacini F., Scopigno R.
In this paper, we present EnvyDepth, an interface for recovering local illumination from a single HDR environment map. In EnvyDepth, the user quickly indicates strokes to mark regions of the environment map that should be grouped together in a single geometric primitive. From these annotated strokes, EnvyDepth uses edit propagation to create a detailed collection of virtual point lights that reproduce both the local and the distant lighting effects in the original scene. When compared to the sole use of the distant illumination, the added spatial information better reproduces a variety of local effects such as shadows, highlights and caustics. Without the effort needed to create precise scene reconstructions, EnvyDepth annotations take only tens of seconds to produce a plausible lighting without visible artifacts. This is easy to obtain even in the case of complex scenes, both indoors and outdoors. The generated lighting environments work well in a production pipeline since they are efficient to use and able to produce accurate renderings.Source: Computer graphics forum (Online) 32 (2013): 411–420. doi:10.1111/cgf.12249
DOI: 10.1111/cgf.12249
Project(s): 3D-COFORM
Metrics:
Banterle F., Callieri M., Dellepiane M., Corsini M., Pellacini F., Scopigno R.
In this paper, we present EnvyDepth, an interface for recovering local illumination from a single HDR environment map. In EnvyDepth, the user quickly indicates strokes to mark regions of the environment map that should be grouped together in a single geometric primitive. From these annotated strokes, EnvyDepth uses edit propagation to create a detailed collection of virtual point lights that reproduce both the local and the distant lighting effects in the original scene. When compared to the sole use of the distant illumination, the added spatial information better reproduces a variety of local effects such as shadows, highlights and caustics. Without the effort needed to create precise scene reconstructions, EnvyDepth annotations take only tens of seconds to produce a plausible lighting without visible artifacts. This is easy to obtain even in the case of complex scenes, both indoors and outdoors. The generated lighting environments work well in a production pipeline since they are efficient to use and able to produce accurate renderings.Source: Computer graphics forum (Online) 32 (2013): 411–420. doi:10.1111/cgf.12249
DOI: 10.1111/cgf.12249
Project(s): 3D-COFORM
Metrics:
See at:
Computer Graphics Forum 
| Computer Graphics Forum 
| onlinelibrary.wiley.com | CNR ExploRA
2013
Conference article
Restricted
HDR image watermarking based on bracketing decomposition
Solachidis V., Maiorana E., Campisi P., Banterle F.
The present paper proposes a novel watermarking scheme specifically designed for high dynamic range (HDR) images. The employed embedding strategy is based on a decomposition of the original HDR representation into multiple low dynamic range (LDR) images by means of a bracketing process. After having inserted the selected watermark into each LDR component, the final output is generated by combining the available contributions into a single HDR object. By exploiting some of the well studied properties of digital watermarking for standard LDR images, our approach is able to generate a watermarked HDR image visually equivalent to the original one, while allowing to detect the embedded information in both the marked HDR image and in its LDR counterpart, obtained through tone-mapping operators or by extracting a specific luminance range of interest from it. Several results obtained from an extensive set of experimental tests are reported to testify the effectiveness of the proposed scheme.Source: DSP 2013 - 18th International Conference on Digital Signal Processing, pp. 1–6, Santorini, Greece, 1-3 July 2013
DOI: 10.1109/icdsp.2013.6622687
Metrics:
Solachidis V., Maiorana E., Campisi P., Banterle F.
The present paper proposes a novel watermarking scheme specifically designed for high dynamic range (HDR) images. The employed embedding strategy is based on a decomposition of the original HDR representation into multiple low dynamic range (LDR) images by means of a bracketing process. After having inserted the selected watermark into each LDR component, the final output is generated by combining the available contributions into a single HDR object. By exploiting some of the well studied properties of digital watermarking for standard LDR images, our approach is able to generate a watermarked HDR image visually equivalent to the original one, while allowing to detect the embedded information in both the marked HDR image and in its LDR counterpart, obtained through tone-mapping operators or by extracting a specific luminance range of interest from it. Several results obtained from an extensive set of experimental tests are reported to testify the effectiveness of the proposed scheme.Source: DSP 2013 - 18th International Conference on Digital Signal Processing, pp. 1–6, Santorini, Greece, 1-3 July 2013
DOI: 10.1109/icdsp.2013.6622687
Metrics:
See at:
doi.org | ieeexplore.ieee.org | CNR ExploRA