Radiance Scaling for versatile surface enhancement

Vergne, Romain; Pacanowski, Romain; Barla, Pascal; Granier, Xavier; Schlick, Christophe

doi:10.1145/1730804.1730827

Cited by 63 publications

(53 citation statements)

References 30 publications

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“…6). Ambient Occlusion and Radiance Scaling were chosen to portray the fine-grained morphology of the 3D models (Vergne et al, 2010). The 3D model with the most sound geometry was yielded via structured light scanning.…”

Section: Geometric Detailmentioning

confidence: 99%

Epic Dimensions: A Comparative Analysis of 3d Acquisition Methods

Graham

Akoglu

Lassen

et al. 2017

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:When it comes to capturing the geometry of a cultural heritage artifact, there is certainly no dearth of possible acquisition techniques. As technology has rapidly developed, the availability of intuitive 3D generating tools has increased exponentially and made it possible even for non-specialists to create many models quickly. Though the by-products of these different acquisition methods may be incongruent in terms of quality, these discrepancies are not problematic, as there are many applications of 3D models, each with their own set of requirements. Comparisons of high-resolution 3D models of an iconic Babylonian tablet, captured via four different closerange technologies discussed in this paper assess which methods of 3D digitization best suit specific intended purposes related to research, conservation and education. Taking into consideration repeatability, time and resource implications, qualitative and quantitative potential and ease of use, this paper presents a study of the strengths and weakness of structured light scanning, triangulation laser scanning, photometric stereo and close-range photogrammetry, in the context of interactive investigation, conditions monitoring, engagement, and dissemination.

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Section: Geometric Detailmentioning

confidence: 99%

Epic Dimensions: A Comparative Analysis of 3d Acquisition Methods

Graham

Akoglu

Lassen

et al. 2017

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…To achieve real-time performance in the exploration of statues, the rendering subsystem employs a scalable adaptive multiresolution rendering approach. The technique is based on a compressed version of the Adaptive TetraPuzzles framework (Cignoni et al 2004;Balsa Rodriguez et al 2013), implemented on top of a deferred rendering system that enhances visualization through screen-space ambient occlusion and radiance scaling (Vergne et al 2010).…”

Section: Visual Exploration Platformmentioning

confidence: 99%

Data-Driven Analysis of Virtual 3D Exploration of a Large Sculpture Collection in Real-World Museum Exhibitions

Agus

Marton

Bettio

et al. 2017

J. Comput. Cult. Herit.

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We analyze use of an interactive system for the exploration of highly detailed three-dimensional (3D) models of a collection of protostoric Mediterranean sculptures. In this system, when the object of interest is selected, its detailed 3D model and associated information are presented at high resolution on a large display controlled by a touch-enabled horizontal surface at a suitable distance. The user interface combines an object-aware interactive camera controller with an interactive point-ofinterest selector and is implemented within a scalable implementation based on multiresolution structures shared between the rendering and user interaction subsystems. The system was installed in several temporary and permanent exhibitions and was extensively used by tens of thousands of visitors. We provide a data-driven analysis of usage experience based on logs gathered during a 27-month period at four exhibitions in archeological museums for a total of more than 75K exploration sessions. We focus on discerning the main visitor behaviors during 3D exploration by employing tools for deriving interest measures on surfaces and tools for clustering and knowledge discovery from high-dimensional data. The results highlight the main trends in visitor behavior during the interactive sessions. These results provide useful insights for the design of 3D exploration user interfaces in future digital installations.

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“…The comparison example 3 is rendered using the Radiance Scaling shader of Meshlab (Vergne et al, 2010). The shader highlights the details of the mesh, making the comparison easier.…”

Section: Full-waveform Versus Discrete Lidar Datamentioning

confidence: 99%

Alignment of Hyperspectral Imagery and Full-Waveform Lidar Data for Visualisation and Classification Purposes

Miltiadou

Warren

Grant

et al. 2015

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Commission VI, WG VI/4KEY WORDS: Integration, Hyperspectral Imagery, Full-waveform LiDAR, Voxelisation, Visualisation, Tree coverage maps ABSTRACT:The overarching aim of this paper is to enhance the visualisations and classifications of airborne remote sensing data for remote forest surveys. A new open source tool is presented for aligning hyperspectral and full-waveform LiDAR data. The tool produces coloured polygon representations of the scanned areas and aligned metrics from both datasets. Using data provided by NERC ARSF, tree coverage maps are generated and projected into the polygons. The 3D polygon meshes show well-separated structures and are suitable for direct rendering with commodity 3D-accelerated hardware allowing smooth visualisation. The intensity profile of each wave sample is accumulated into a 3D discrete density volume building a 3D representation of the scanned area. The 3D volume is then polygonised using the Marching Cubes algorithm. Further, three user-defined bands from the hyperspectral images are projected into the polygon mesh as RGB colours. Regarding the classifications of full-waveform LiDAR data, previous work used extraction of point clouds while this paper introduces a new approach of deriving information from the 3D volume representation and the hyperspectral data. We generate aligned metrics of multiple resolutions, including the standard deviation of the hyperspectral bands and width of the reflected waveform derived from the volume. Tree coverage maps are then generated using a Bayesian probabilistic model and due to the combination of the data, higher accuracy classification results are expected.* Corresponding author. This is useful to know for communication with the appropriate person in cases with more than one author.

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Radiance Scaling for versatile surface enhancement

Cited by 63 publications

References 30 publications

Epic Dimensions: A Comparative Analysis of 3d Acquisition Methods

Epic Dimensions: A Comparative Analysis of 3d Acquisition Methods

Data-Driven Analysis of Virtual 3D Exploration of a Large Sculpture Collection in Real-World Museum Exhibitions

Alignment of Hyperspectral Imagery and Full-Waveform Lidar Data for Visualisation and Classification Purposes

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