Miscellaneous Three-Dimensional Imaging Techniques

Okoshi, T.

doi:10.1016/b978-0-12-525250-8.50013-x

Cited by 150 publications

(143 citation statements)

References 22 publications

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“…The capability of an observer to perceive depth and 3-D object shape from binocular disparity is a well-studied issue (Helmholtz, 1925;Ogle, 1950Ogle, , 1958 and constitutes the theoretical basis for modern techniques of 3-D vision (Okoshi, 1976;Trucco and Verri, 1999), as well as a basic skill used in photogeological analyses (Allum, 1966;Lattmann, 1992;Miller, 1992). In the common practice, this indirect estimation can be more accurate than a single direct measurement carried out with a compass, especially in the case of very rough and irregular planar surfaces that require the use of support discs with increasing diameters (Fecker and Rengers, 1971;Hoek, 1972;ISRM, 1981).…”

Section: Methodsmentioning

confidence: 99%

Detailed rock failure susceptibility mapping in steep rocky coasts by means of non-contact geostructural surveys: the case study of the Tigullio Gulf (Eastern Liguria, Northern Italy)

Vita

Cevasco

Cavallo

2012

Nat. Hazards Earth Syst. Sci.

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Abstract. In this study, an engineering geological analysis for the assessment of the rock failure susceptibility of a high, steep, rocky coast was developed by means of non-contact geostructural surveys. The methodology was applied to a 6-km coastal cliff located in the Gulf of Tigullio (Northern Tyrrhenian Sea) between Rapallo and Chiavari.The method is based on the geostructural characterisation of outcropping rock masses through meso-and macroscale stereoscopic analyses of digital photos that were taken continuously from a known distance from the coastline. The results of the method were verified through direct surveys of accessible sample areas. The rock failure susceptibility of the coastal sector was assessed by analysing the fundamental rock slope mechanisms of instability and the results were implemented into a Geographic Information System (GIS).The proposed method is useful for rock failure susceptibility assessments in high, steep, rocky coastal areas, where accessibility is limited due to cliffs or steep slopes. Moreover, the method can be applied to private properties or any other area where a complete and systematic analysis of rock mass structural features cannot be achieved.Compared to direct surveys and to other non-contact methods based on digital terrestrial photogrammetry, the proposed procedure provided good quality data of the structural features of the rock mass at a low cost. Therefore, the method could be applied to similar coastal areas with a high risk of rock failure occurrence.

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Section: Methodsmentioning

confidence: 99%

Detailed rock failure susceptibility mapping in steep rocky coasts by means of non-contact geostructural surveys: the case study of the Tigullio Gulf (Eastern Liguria, Northern Italy)

Vita

Cevasco

Cavallo

2012

Nat. Hazards Earth Syst. Sci.

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“…Three-dimensional (3D) imaging techniques have been considered as an important issue in the computer vision, target tracking, object recognition, and so on [1][2][3][4][5].Various methods for capturing and visualization of 3D objects in space have been studied [6][7][8][9][10][11][12][13][14] including integral imaging, synthetic aperture integral imaging (SAII) and axially distributed image sensing (ADS). Among them, the extended version of ADS was reported called axially distributed stereo sensing (ADSS) which is implemented using a stereo camera [14].…”

Section: Introductionmentioning

confidence: 99%

Depth Resolution Analysis of Axially Distributed Stereo Camera Systems under Fixed Constrained Resources

Cho

Shin

2013

Journal of the Optical Society of Korea

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In this paper, we propose a novel framework to evaluate the depth resolution of axially distributed stereo sensing (ADSS) under fixed resource constraints. The proposed framework can evaluate the performance of ADSS systems based on various sensing parameters such as the number of cameras, the number of total pixels, pixel size and so on. The Monte Carlo simulations for the proposed framework are performed and the evaluation results are presented.

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“…This kind of technology generates a real depth perception for multiple viewers without any special aids, like stereo glasses [23]. The brain perceives a 3D sensation through pairs of 2D images, providing a stereo parallax view.…”

Section: Introductionmentioning

confidence: 99%

Synthetic content generation for auto-stereoscopic displays

Gonzalez

Sotoca

Pla

et al. 2013

Multimed Tools Appl

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Due to the appearance of auto-stereoscopic visualization as one of the most emerging tendencies used in displays, new content generation techniques for this kind of visualization are required. In this paper we present a study for the generation of multi-view synthetic content, studying several camera setups (planar, cylindrical and hyperbolic) and their configurations. We discuss the different effects obtained varying the parameters of these setups. A study with several users was made to analyze visual perceptions, asking them for their optimal visualization. To create the virtual content, a multiview system has been integrated in a powerful game engine, which allows us to use the latest graphics hardware advances. This integration is detailed and several demos and videos are attached with this paper, which represent a virtual world for auto-stereoscopic displays and the same scenario in a two-view anaglyph representation for being visualized in any conventional display. In all these demos, the parameters studied can be modified offering the possibility of easily appreciate their effects in a virtual scene.

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Miscellaneous Three-Dimensional Imaging Techniques

Cited by 150 publications

References 22 publications

Detailed rock failure susceptibility mapping in steep rocky coasts by means of non-contact geostructural surveys: the case study of the Tigullio Gulf (Eastern Liguria, Northern Italy)

Detailed rock failure susceptibility mapping in steep rocky coasts by means of non-contact geostructural surveys: the case study of the Tigullio Gulf (Eastern Liguria, Northern Italy)

Depth Resolution Analysis of Axially Distributed Stereo Camera Systems under Fixed Constrained Resources

Synthetic content generation for auto-stereoscopic displays

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