Relevant bibliographies by topics / Vegetation rendering

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Vegetation rendering'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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Journal articles on the topic "Vegetation rendering"

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Argudo, Oscar, Antonio Chica, and Carlos Andujar. "Single-picture reconstruction and rendering of trees for plausible vegetation synthesis." Computers & Graphics 57 (June 2016): 55–67. http://dx.doi.org/10.1016/j.cag.2016.03.005.

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Tsiampousi, A., L. Zdravkovic, and D. M. Potts. "Numerical study of the effect of soil–atmosphere interaction on the stability and serviceability of cut slopes in London clay." Canadian Geotechnical Journal 54, no. 3 (March 2017): 405–18. http://dx.doi.org/10.1139/cgj-2016-0319.

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The stability of cut slopes is greatly influenced by seasonal pore-water pressure variations under the combined effect of rainfall and vegetation. However, predicting soil–atmosphere interaction is not straightforward, due to the complexity of both the boundary conditions involved and the hydromechanical behaviour of soils, which is coupled and highly nonlinear, rendering the use of numerical tools, such as finite element analysis, necessary. This paper discusses the numerical modelling of soil–atmosphere interaction and presents the analysis of a slope cut in London clay in a highly vegetated area. The whole life cycle of the slope is considered with phases of low and high water demand vegetation and vegetation clearance. The analysis results indicate that dense vegetation is associated with high factors of safety, but may induce large differential displacements, which are likely to affect the serviceability of the slope. Vegetation clearance, however, may initiate instability, highlighting the need for effective vegetation management to achieve a balance between serviceability and ultimate limit states. Although the case considered is representative of southeast England, it introduces the necessary tools for realistic numerical analysis of soil–atmosphere interaction.
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Zhang, Dou, Xiaolei Geng, Wanxu Chen, Lei Fang, Rui Yao, Xiangrong Wang, and Xiao Zhou. "Inconsistency of Global Vegetation Dynamics Driven by Climate Change: Evidences from Spatial Regression." Remote Sensing 13, no. 17 (August 30, 2021): 3442. http://dx.doi.org/10.3390/rs13173442.

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Global greening over the past 30 years since 1980s has been confirmed by numerous studies. However, a single-dimensional indicator and non-spatial modelling approaches might exacerbate uncertainties in our understanding of global change. Thus, comprehensive monitoring for vegetation’s various properties and spatially explicit models are required. In this study, we used the newest enhanced vegetation index (EVI) products of Moderate Resolution Imaging Spectroradiometer (MODIS) Collection 6 to detect the inconsistency trend of annual peak and average global vegetation growth using the Mann–Kendall test method. We explored the climatic factors that affect vegetation growth change from 2001 to 2018 using the spatial lag model (SLM), spatial error model (SEM) and geographically weighted regression model (GWR). The results showed that EVImax and EVImean in global vegetated areas consistently showed linear increasing trends during 2001–2018, with the global averaged trend of 0.0022 yr−1 (p < 0.05) and 0.0030 yr−1 (p < 0.05). Greening mainly occurred in the croplands and forests of China, India, North America and Europe, while browning was almost in the grasslands of Brazil and Africa (18.16% vs. 3.08% and 40.73% vs. 2.45%). In addition, 32.47% of the global vegetated area experienced inconsistent trends in EVImax and EVImean. Overall, precipitation and mean temperature had positive impacts on vegetation variation, while potential evapotranspiration and vapour pressure had negative impacts. The GWR revealed that the responses of EVI to climate change were inconsistent in an arid or humid area, in cropland or grassland. Climate change could affect vegetation characteristics by changing plant phenology, consequently rendering the inconsistency between peak and mean greening. In addition, anthropogenic activities, including land cover change and land use management, also could lead to the differences between annual peak and mean vegetation variations.
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Zach, Christopher, Stephan Mantler, and Konrad Karner. "Time-Critical Rendering of Huge Ecosystems Using Discrete and Continuous Levels of Detail." Presence: Teleoperators and Virtual Environments 13, no. 6 (December 2004): 656–67. http://dx.doi.org/10.1162/1054746043280574.

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We present a novel level-of-detail selection method for real-time rendering, which works on hierarchies of discrete and continuous representations. We integrate smoothly represented, point-rendered objects with discrete polygonal geometry and demonstrate our approach in a terrain-flyover application. In this testing application the digital elevation model is augmented with forests in accordance with satellite data. The vegetation is rendered as a continuous sequence of splats generated from a procedural description. Further, we discuss enhancements to our basic method to improve its scalability.
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Hempe, Nico, Jürgen Rossmann, and Björn Sondermann. "Generation and Rendering of Interactive Ground Vegetation for Real-Time Testing and Validation of Computer Vision Algorithms." ELCVIA Electronic Letters on Computer Vision and Image Analysis 12, no. 2 (April 12, 2013): 40. http://dx.doi.org/10.5565/rev/elcvia.519.

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Lensky, I. M., and D. Rosenfeld. "Clouds-Aerosols-Precipitation Satellite Analysis Tool (CAPSAT)." Atmospheric Chemistry and Physics 8, no. 22 (November 24, 2008): 6739–53. http://dx.doi.org/10.5194/acp-8-6739-2008.

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Abstract. A methodology for representing much of the physical information content of the METEOSAT Second Generation (MSG) geostationary satellite using red-green-blue (RGB) composites of the computed physical values of the picture elements is presented. The physical values are the solar reflectance in the solar channels and brightness temperature in the thermal channels. The main RGB compositions are (1) "Day Natural Colors", presenting vegetation in green, bare surface in brown, sea surface in black, water clouds as white, ice as magenta; (2) "Day Microphysical", presenting cloud microstructure using the solar reflectance component of the 3.9 μm, visible and thermal IR channels; (3) "Night Microphysical", also presenting clouds microstructure using the brightness temperature differences between 10.8 and 3.9 μm; (4) "Day and Night", using only thermal channels for presenting surface and cloud properties, desert dust and volcanic emissions; (5) "Air Mass", presenting mid and upper tropospheric features using thermal water vapor and ozone channels. The scientific basis for these rendering schemes is provided, with examples for the applications. The expanding use of these rendering schemes requires their proper documentation and setting as standards, which is the main objective of this publication.
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Lensky, I. M., and D. Rosenfeld. "Clouds-Aerosols-Precipitation Satellite Analysis Tool (CAPSAT)." Atmospheric Chemistry and Physics Discussions 8, no. 2 (March 5, 2008): 4765–809. http://dx.doi.org/10.5194/acpd-8-4765-2008.

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Abstract. A methodology for representing much of the physical information content of the METEOSAT Second Generation (MSG) geostationary satellite using red-green-blue (RGB) composites of the computed physical values of the picture elements is presented. The physical values are the solar reflectance in the solar channels and brightness temperature in the thermal channels. The main RGB compositions are (1) "Day Natural Colors", presenting vegetation in green, bare surface in brown, sea surface in black, water clouds as white, ice as magenta; (2) "Day Microphysical", presenting cloud microstructure using the solar reflectance component of the 3.9 μm, visible and thermal IR channels; (3) "Night Microphysical", also presenting clouds microstructure using the brightness temperature differences between 10.8 and 3.9 μm; (4) "Day and Night", using only thermal channels for presenting surface and cloud properties, desert dust and volcanic emissions; (5) "Air Mass", presenting mid and upper tropospheric features using thermal water vapor and ozone channels. The scientific basis for these rendering schemes is provided, with examples for the applications. The expanding use of these rendering schemes requires their proper documentation and setting as standards, which is the main objective of this publication.
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Krejčí, Markéta. "Function of the vegetative elements in contemporaneous interpretation of the architectonic work." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 56, no. 4 (2008): 239–46. http://dx.doi.org/10.11118/actaun200856040239.

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The creative process during which a vegetation element finds itself in the position of a fundamental part of material design of the building can be found in the field of modern architectural production. Along with other building materials, it has its own task to participate in the composition of architectural space. This represents an authentic approach of the current production where the do­mi­na­ting position of the vegetation material determines the unique character of the final work. In these exis­ting factors of practice, the vegetation material is treated, according to the three branches of purposefulness after Friedrich Schinkel, as fundamental part of structural composition of the architectural work. In considered cases, when the vegetation material is removed, the building loses its functional qualities or basic value of expression. Studied cases have proved the existing application of vegetation motives and their combinations the garden art has worked with for centuries. However, mo­dern architectural production adapts them to fields of application that are completely new. It develops these original sources of inspiration that lead modern architecture to totally inventive and new results. The above-mentioned factors are the subject of this paper the purpose of which is to provide basic determination of real applicability of the green mass in the materials applied in the building construction and give examples of current leading finished examples. On the one hand, ar­chi­tec­tu­ral objects restore, with the application of vegetation elements, natural form of greenery in urban interior on the individual level of human dimension. On the other hand, with their help, when siting a project in open space you can also prevent building of a totalitarian wall in the form of a building mass. Thus contextuality of the executed project is achieved in relation to its surroundings. In the presented architectural initiatives the vegetation element plays the role of a structural element of the building shell, the shading and sunlight protection design, rendering of the components of interior projects, the building roof, or in inspiring transformation of a vegetation motive applied to extend the nature‘s boundary to dead building materials. The fact that frequent application of vegetation material is perceived on an individual level implies that architecture applies this type of creative approach in the building forms in which the biggest possible effect can be achieved. This includes the field of non-manufacturing building forms of housing structures and civic buildings. Thus in modern architecture the extension of the range of application of vegetation elements results in shifting of the limits of their possible and feasible applications and this again leads to the fact that the historic interconnection of co-operation of the building trades and the landscape architecture is stressed even more. Ori­gi­nal treatment and development of the general vegetation motive in the landscape work is definitely clear in any finished projects presented. This implies the search for innovative approach that always shows an original idea of the team of authors in the field of the current creative process.
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Leuenberger, Wendy, Estefania Larsen, Jacob Leuenberger, and Dylan Parry. "Predation on Plasticine Model Caterpillars: Engaging High School Students Using Field-Based Experiential Learning & the Scientific Process." American Biology Teacher 81, no. 5 (May 1, 2019): 334–39. http://dx.doi.org/10.1525/abt.2019.81.5.334.

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Engaging students in hands-on inquiry helps them develop skills associated with the scientific process. Development of simple experiments using model caterpillars can provide an experiential demonstration of the scientific process and ecological principles for high school students. Caterpillar models are formed from plasticine, a nontoxic, nondrying modeling clay, and are an excellent tool for quantifying relative predation rates by birds, small mammals, and invertebrates. Lifelike surrogate larvae are glued to vegetation for short periods (one week) and retain identifiable marks (beak, teeth, mandible imprints) following predator attack. This technique is simple, inexpensive, and provides rapid and clear results, rendering it a highly effective method of inquiry for high school students. Students can use these methods to ask a variety of research questions, such as comparison of predation in nearby habitats (park vs. backyard), vegetation (tree vs. shrub), season (spring vs. fall), or coloration (aposematic vs. camouflage). For many students, this may be one of few opportunities at the high school level to investigate science “in the field” and integrate scientific practices, such as the scientific method and inquiry, in an authentic research experience. Participants develop their scientific reasoning skills through creation of research questions and interpretation of results. They learn experimental technique, build field skills, and work collaboratively. This experiment aligns with the Next Generation Science Standards.
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Jia, Chunfeng, Bao-ping Sun, Xinxiao Yu, and Xiaohui Yang. "Evaluation of Vegetation Restoration along an Expressway in a Cold, Arid, and Desertified Area of China." Sustainability 11, no. 8 (April 17, 2019): 2313. http://dx.doi.org/10.3390/su11082313.

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Vegetation restoration plays a significant role in the restoration of expressways in the arid zone of China, but we still do not know which soil and vegetation types are most effective. We investigated soil particle size (SPZ), volume weight of the soil (VWS), soil water content (SWC), total porosity of soil (TP), soil organic matter (SOM), water erosion (WrE), and wind erosion (WdE) of eight sites (S1–S8) and evaluated them using the gray correlation method (GCM). Based on our results, the average SWC of the treatments ranged from 9.6% to 18.8%, following the order S4 > S5 > S8 > S6 > S3 > S7 > S1 > S2. The average SPZ of soils in S1, S2, S4, S5, S6, and S8 was larger, ranging from 0.23 to 0.68 mm, while that of soils in S3 and S7 was smaller, ranging from 0.01 to 0.09 mm. The TP in different treatment areas ranged from 50% to 60%, which is not conducive to soil and water conservation. The SOM levels varied widely among the different soils and were always below the threshold levels established by the second National Soil Census, rendering the soils not suitable for plant growth. The WrE (36–80 t/ha) was greater than the WdE (7–24 t/ha). In general, to achieve high soil and water conservation outcomes in this area, S1 and S7 offered the best protection benefits in terms of soil and water conservation.
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Dissertations / Theses on the topic "Vegetation rendering"

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Jansson, Emil. "Matematisk generering och realtidsrendering av vegetation i Gizmo3D." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2324.

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To render outdoor scenes with lots of vegetation in real time is a big challenge. This problem has important applications in the areas of visualization and simulation. Some progress has been made the last years, but a previously unsolved difficulty has been to combine high rendering quality with abundant variation in scenes.

I present a method to mathematically generate and render vegetation in real time, with implementation in the scene graph Gizmo3D. The most important quality of the method is its ability to render scenes with many unique specimens with very low aliasing.

To obtain real time performance, a hierarchical level-of-detail scheme (LOD- scheme) is used which facilitates generation of vegetation in the desired level- of-detail on the fly. The LOD-scheme is texture-based and uses textures that are common for all specimens of a whole species. The most important contribution is that I combine this LOD-scheme with the use of semi- transparency, which makes it possible to obtain low aliasing.

Scenes with semi-transparency require correct rendering order. I solve this problem by introducing a new method for approximate depth sorting. An additional contribution is a variant of axis-aligned billboards, designated blob, which is used in the LOD-scheme. Furthermore, building blocks consisting of small branches are used to increase generation performance.

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Borse, Jitendra Arun. "Real-Time Image Based Rendering for Stereo Views of Vegetation." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-11222002-013933/.

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Rendering of detailed vegetation for real-time applications has always been difficult because of the high polygon count in 3D models. Generating correctly warped images for nonplanar projection surfaces often requires even higher degrees of tessellation. Generating left and right eye views for stereo would further reduce the frame rate since information for a one eye view cannot be used to redraw the vegetation for the other eye view. We describe an image based rendering approach that is a modification of an algorithm for monoscopic rendering of vegetation proposed by Aleks Jauklin. The Jauklin algorithm pre-renders vegetation models from six viewpoints; rendering from an arbitrary viewpoint is achieved by compositing the nearest two slicings. Slices are alpha blended as the user changes viewing positions. The blending produces visual artifacts that are not distracting in a monoscopic environment but are very distracting in a stereo environment. We have modified the algorithm so it displays all pre-rendered images simultaneously, and slicings are partitioned and rendered in a back-to-front order. This approach improves the quality of the stereo, maintains the basic appearance of the vegetation, and reduces visual artifacts but it increases rendering time slightly and produces a rendering that is not totally faithful to the original vegetation model.
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Enochsson, Arvid. "Tolkning och rendering av L-system med beräknings-shaders." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-18762.

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I detta arbete utförs en jämförelse av exekveringstid för tolkning och rendering av Lindenmayersystem (L-system), utfört av samma algoritm på CPU’n (eng. central processingunit) och GPU’n (eng. graphics processing unit). Undersökningen fokuserar på exekveringstid och dess utveckling vid olika typer av L-system, längder samt upplösning. Algoritmen implementerades i spelmotorn Unity både på CPU’n via C# och på GPU’n medhjälp av beräknings-shaders. Experimenten bestod av två L-system. Ett med förgreningaroch ett utan. Båda L-systemen testades med olika upplösningar och längder, varpå exekveringstid avlästes. Experimentens resultat påvisar stor fördel hos CPU-lösningen gällande exekveringstid. Bristen på GPU-anpassad kod, exempelvis kod utan förgreningar och med bra minneshantering, leder till att GPU’n presterar sämre. Arbetet avslutas med förslag på vidareforskning. Förslagen innefattar utökad testning på olika hårdvara, en mer kontrollerad testmiljö samt implementering av algoritmen i faktisk spelproduktion.
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Zelený, Jan. "Realistická krajina s vegetací." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2009. http://www.nusl.cz/ntk/nusl-236670.

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There is enough rendering power to draw more than only simple indoor scenes today and it can produce very realistic images of landscape with vegetation. Moreover, there are new sophisticated methods for generating of such landscape and simulation of plants ecosystem. This text explains few algorithms for generating and methods for interactive rendering of landscape and vegetation.
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Book chapters on the topic "Vegetation rendering"

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Rivas, Jesús A. "The Anaconda Challenge." In Anaconda, 8–22. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780199732876.003.0002.

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This chapter focuses on the llanos, Venezuela’s natural floodplain, where the author decided to start his study of anacondas. The llanos is a flatland that comprises about a third of both Venezuela and Colombia. It is composed of an extensive system of natural, seasonally flooded grasslands. The llanos is located to the north and west of the Orinoco River and sits on the northern borders of the Amazon basin. Because of this, most of the wildlife of the Amazon can be found in the llanos, where it is easier to observe animals in the open vegetation of the savanna. The extreme seasonality of the llanos made all the difference in the success of the author’s anaconda research. Anacondas, being aquatic, concentrate in the few water bodies that hold water during the dry season. During this time, the chance of finding anacondas was much higher. The chapter then explores the physical build of snakes. Most snakes have adaptations of the skull and jaws involving mobile hinges, and a whole arrangement of joints and muscles evolved for swallowing large prey. The extra mobility of the snake’s jaws is obtained by giving up solid skull sutures that the ancestral lizards had, rendering the snake’s head more vulnerable to damage.
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Velarde, Enriqueta, and Exequiel Ezcurra. "Breeding Dynamics of Heermann’s Gulls." In Island Biogeography in the Sea of Cortés II. Oxford University Press, 2002. http://dx.doi.org/10.1093/oso/9780195133462.003.0017.

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Islands are landmarks for sea birds, whether for orientation, as resting points during foraging and migration trips, or most importantly as nesting sites. This is due to the isolation that islands offer, rendering them free of many of the continental predators. If, additionally, islands are located in the midst of highly productive waters, they provide sea birds with abundant food, which is particularly valuable during the nesting season. This is the case in the northern Sea of Cortes. Not surprisingly, we find that the islands of this region are nesting sites for more than 90% of the world’s populations of Heermann’s Gulls (Larus heermanni) and Elegant Terns (Sterna elegans), and for about 90% of the global populations of the Least Storm-petrel (Oceanodroma microsoma), the Craven’s Murrelet (Synthliboramphus craveri), and the Yellow- footed Gull (Lams livens). The midriff island area of the Gulf of California also shelters approximately 70% of the world’s Black Storm-petrel (O. melania) and, at the subspecific level, provides breeding grounds for about 50% of the California Brown Pelicans (Pelecanus occidentalis californicus), 50% of the Blue-footed Boobies (Sula nebouxii nebouxii), and 40% of the Brown Boobies (S. leucogaster brewsteri). A combination of characteristics in one particular island, Rasa, has made it a natural breeding sanctuary for Heermann’s Gulls. Besides the two traits mentioned above (lack of land predators and high marine productivity), these characteristics include (1) its characteristic flat topography from which it derives its name (rasa means “flat” in Spanish), and (2) its sparse vegetation cover, resulting from the extensive coverage of the island with guano that hinders vegetation growth. The Heermann’s Gull is the only North American representative of the group of White-hooded Gulls (Anderson 1983; Moynihan 1959; Storer 1971). The only other member of this group of gulls and hence its closest relative is the Grey Gull (Lams modestus), which inhabits the Pacific coast of South America along Chile and Peru and breeds inland in the Atacama Desert some 50-100 km away from the coast (Howell et al. 1974; Howell 1978).
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Conference papers on the topic "Vegetation rendering"

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Zhang, Zilong, Xun Luo, Maria Gabriela Salazar Vaca, Danny Alberto Espinoza Castro, and Yi Chen. "Vegetation Rendering Optimization for Virtual Reality Systems." In 2017 International Conference on Virtual Reality and Visualization (ICVRV). IEEE, 2017. http://dx.doi.org/10.1109/icvrv.2017.00094.

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Borse, Jitendra, and David F. McAllister. "Real-time image-based rendering for stereo views of vegetation." In Electronic Imaging 2002, edited by Andrew J. Woods, John O. Merritt, Stephen A. Benton, and Mark T. Bolas. SPIE, 2002. http://dx.doi.org/10.1117/12.468070.

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Paulus Franzin, Flavio, Cesar Tadeu Pozzer, and Bruno Torres do Nascimento. "GPU-Based Rendering and Collision Simulation of Ground Vegetation in Large-Scale Virtual Scenarios." In 2019 18th Brazilian Symposium on Computer Games and Digital Entertainment (SBGames). IEEE, 2019. http://dx.doi.org/10.1109/sbgames.2019.00024.

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Berssenbrügge, Jan, Jörg Stöcklein, Andre Koza, and Iris Gräßler. "Procedural Generation of Vegetation for a Virtual Test Track." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34891.

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Advanced driver assistant systems (ADAS) are increasingly being tested during simulated test drives in a test and training environment based on a driving simulator, in order to reduce the number of extensive real test drives. The need for numerous virtual test drives in the driving simulator requires to model detailed and realistically appearing 3D models of real test tracks. A manual reproduction of real tracks is a cumbersome and time-intensive task. In previous work, we have introduced a method to create virtual test tracks with minimized manual effort using data from various sources, such as navigation systems, digital elevation models, aerial images, digital landscape models etc. [1]. However, these virtual test tracks still do not appear very realistic to the test driver, since no detailed vegetation was generated by that method. In this paper, we propose an approach to enrich a virtual terrain with authentic vegetation. The aim is to increase the perceived realism of the landscape, in order to provide the same input for the sensors of an ADAS under test in the driving simulator as on the real track. The requirement is to automate the vegetation generation as far as possible and to support real-time rendering of the generated very complex 3D model, which is crucial for a usable sensor feed. The basis for the generation of vegetation in this work is data from digital landscape models. These data define where areas like woodlands and agricultural zones are located in geographic coordinates. These areas are refined by a color detection, which is applied to the corresponding aerial images, in order to identify various tree and plant species. Based on the application of a procedural rule system the actual plants are then placed in the refined areas. The rule system imitates the natural growth behavior of plants and is based on terrain characteristics like gradient, direction of a slope, or competition for resources. By combining terrain data, color detection on aerial images, and procedural rules, a planting method is developed to generate natural looking vegetation. The implementation prototype of our approach, based on the Unity3D game engine, which supports an easy creation of complex sceneries, showed that it is possible to create vegetation for a virtual test track with minimal manual effort. By placing vegetation at realistic locations, considering natural spread of plants, the perceived realism of the scene was improved. A performance analysis showed that even with the generated vegetation, interactive frame rates are achievable.
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