Dissertation > Excellent graduate degree dissertation topics show

Ocean Surface Modeling and Rendering on Digital Earth

Author: ZuoShi
Tutor: WuLingDa
School: National University of Defense Science and Technology
Course: Control Science and Engineering
Keywords: Digital Earth Ocean Wave Model Ocean Surface Grid Light Effect Sky Effect
CLC: TP391.41
Type: Master's thesis
Year: 2007
Downloads: 127
Quote: 2
Read: Download Dissertation

Abstract


With the advances of earth observation, data processing and other technology, the digital earth technology has developed very rapidly in recent years and been applied rapidly in various fields, especially in the virtual battlefield and combat simulation. In these fields, it plays important part in the true feeling of system to model and render the ocean surface which covers about 70% of the entire earth surface. In some applications, the ocean surface itself is the emphases of visualization and the basal environment of other applications. This paper aims to render the ocean surface rapidly and realistically based on studying ocean wave model and ocean surface grid generation.The main results and innovation are:1. Improve the ocean wave model based on Perlin noise. The improved model may be applied to render ocean surface on digital earth, which solves many problems such as huge computation quantity and compression phenomenon in the high latitude.2. Propose a viewpoint correlation spherical highly field grid generation algorithm. It adopt Projection Plane Division Algorithm because of the difficulty of computing spherical visible region. According to the point of intersection of the line through viewpoint and projection plane sampling point and earth’s surface, it generates the earth’s surface visible region multi-resolution grid, then, according to the sea and land judgement algorithm, generates ocean surface visible region multi-resolution grid. This method can generate dynamic spherical surface multi- resolution grid according to the change of viewpoint position and direction, moreover, can transit between the different levels of detail continuously.3. Simulate the ocean surface illumination effect and the sky. It adopts simplified illumination model to simulate the ocean surface illumination effect, and adopts spherical method to sumulate the sky.4. Realize a ocean surface modeling and rendering prototype system which confirms the feasibility and accuracy of the algorithms.

Related Dissertations

  1. Modeling and Rendering of Floods and Forest Fire Disaster Based on Three-dimensional Digital Earth,P426.616;S762
  2. Skyline of Web - based 3D GIS applications,P208
  3. Parsing and Applying of HGML on Geo-browser Platform Based on G/S Model,TP393.092
  4. Development and Application of Open Source GIS,P208
  5. Google Earth railway line selection system of three-dimensional space,U212.32
  6. The Study of Metadata Management Based on G/S Mode Servers,TP393.05
  7. Digital City in the application of virtual reality technology and artistic Discussion,TP391.9
  8. Research on Navigation Platform Based on the Fusion of Multi-dimensional Space Information,U675.7
  9. Research and Development of Senior Middle School Geography Teaching Software Based on Digital Earth Technology,TP391.6
  10. Based Silververlight 's 3D digital earth model construction and application of key technologies,P208
  11. Research and Application of Earthquake Information Platform Based on G/S Model,P315
  12. The Critical Research of PDA Embedded Geo-Browser Based on G/S Model,TP393.092
  13. Research on Massive Spatial Data Visualization Engine,TP391.41
  14. Study on Simulation of Satellite IFOV and Visualization of Remote Sensing Images,TP751
  15. Meteorology Information Visualization in Global Framework,TP391.41
  16. Integration and Visualization of Battlefield Information on Digital Earth,TP391.41
  17. \,P208
  18. WebGIS OpenMap source of theoretical research and analysis,P208
  19. Research on Algorithm for Colorful Image of Remote Sensing in JINPING Area,P237
  20. Study on Visualization and Algorithm of 3D Earth Model,TP391.9

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
© 2012 www.DissertationTopic.Net  Mobile