Interactive dense point clouds in a game engine

Virtanen, Juho‐Pekka; Daniel, Sylvie; Turppa, Tuomas; Zhu, Long; Julin, Arttu; Hyyppä, Hannu; Hyyppä, Juha

doi:10.1016/j.isprsjprs.2020.03.007

Cited by 32 publications

(21 citation statements)

References 69 publications

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“…Dense, terrestrial point clouds, if classified and visualized via a suitable system, could offer a much more detailed depiction of the urban environment than current semantic 3D city models. With game engine technology, even the combination of point cloud data and VR visualization could be attained [74]..…”

Section: Future Research Topicsmentioning

confidence: 99%

Near Real-Time Semantic View Analysis of 3D City Models in Web Browser

Virtanen

Jaalama

Puustinen

et al. 2021

IJGI

Self Cite

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3D city models and their browser-based applications have become an increasingly applied tool in the cities. One of their applications is the analysis views and visibility, applicable to property valuation and evaluation of urban green infrastructure. We present a near real-time semantic view analysis relying on a 3D city model, implemented in a web browser. The analysis is tested in two alternative use cases: property valuation and evaluation of the urban green infrastructure. The results describe the elements visible from a given location, and can also be applied to object type specific analysis, such as green view index estimation, with the main benefit being the freedom of choosing the point-of-view obtained with the 3D model. Several promising development directions can be identified based on the current implementation and experiment results, including the integration of the semantic view analysis with virtual reality immersive visualization or 3D city model application development platforms.

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Section: Future Research Topicsmentioning

confidence: 99%

Near Real-Time Semantic View Analysis of 3D City Models in Web Browser

Virtanen

Jaalama

Puustinen

et al. 2021

IJGI

Self Cite

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“…The data gathered from reality vary in forms and utility scope. Three-dimensional point clouds and 3D mesh are the most common geospatial data types within VR applications, with examples in [24,35,36].…”

Section: Data Capture For Cultural Sitementioning

confidence: 99%

“…Then, the compression and structuration of such datasets are heavy constraints that limit the integration of point clouds directly in VR scenarios [39]. Some work, such as [35,36,40], permit the integration of massive point clouds data, but an effective visualization and interaction are still limited. Three-dimensional mesh representation is more commonly found within the industry workflows, first propelled by the history of obtaining 3D information without reality capture devices.…”

Section: Data Capture For Cultural Sitementioning

confidence: 99%

Initial User-Centered Design of a Virtual Reality Heritage System: Applications for Digital Tourism

et al. 2020

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Reality capture allows for the reconstruction, with a high accuracy, of the physical reality of cultural heritage sites. Obtained 3D models are often used for various applications such as promotional content creation, virtual tours, and immersive experiences. In this paper, we study new ways to interact with these high-quality 3D reconstructions in a real-world scenario. We propose a user-centric product design to create a virtual reality (VR) application specifically intended for multi-modal purposes. It is applied to the castle of Jehay (Belgium), which is under renovation, to permit multi-user digital immersive experiences. The article proposes a high-level view of multi-disciplinary processes, from a needs analysis to the 3D reality capture workflow and the creation of a VR environment incorporated into an immersive application. We provide several relevant VR parameters for the scene optimization, the locomotion system, and the multi-user environment definition that were tested in a heritage tourism context.

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“…Accurate 3D information, such as imagebased and range scanner-based point clouds are rapidly becoming more available to the users, easy and low-cost to acquire. Hence, it is an open topic to discover novel and effective ways to make good use of them and increase the realism of VR experiences (Virtanen et al, 2020). Moreover, extended reality (xR) applications usually require the geographical reference of any kind of data, either this is the base map, some detailed 3D models, or any other layer of information.…”

Section: Previous Workmentioning

confidence: 99%

Developing a Strategy for Precise 3d Modelling of Large-Scale Scenes for Vr

Saer¹,

Stentoumis²,

Kalisperakis³

et al. 2020

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

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Abstract. In this work, we present a methodology for precise 3D modelling and multi-source geospatial data blending for the purposes of Virtual Reality immersive and interactive experiences. We evaluate it on the volcanic island of Santorini due to its formidable geological terrain and the interest it poses for scientific and touristic purposes. The methodology developed here consists of three main steps. Initially, bathymetric and SRTM data are scaled down to match the smallest resolution of our dataset (LIDAR). Afterwards, the resulted elevations are combined based on the slope of the relief, while considering a buffer area to enforce a smoother terrain. As a final step, the orthophotos are combined with the estimated Digital Terrain Model, via applying a nearest neighbour matching schema leading to the final terrain background. In addition to this, both onshore and offshore points-of-interest were modelled via image-based 3D reconstruction and added to the virtual scene. The overall geospatial data that need to be visualized in applications demanding photo-textured hyper-realistic models pose a significant challenge. The 3D models are treated via a mesh optimization workflow, suitable for efficient and fast visualization in virtual reality engines, through mesh simplification, physically based rendering texture maps baking, and level-of-details.

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Interactive dense point clouds in a game engine

Cited by 32 publications

References 69 publications

Near Real-Time Semantic View Analysis of 3D City Models in Web Browser

Near Real-Time Semantic View Analysis of 3D City Models in Web Browser

Initial User-Centered Design of a Virtual Reality Heritage System: Applications for Digital Tourism

Developing a Strategy for Precise 3d Modelling of Large-Scale Scenes for Vr

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