Graphics Design for Web3D Landscape using Rotating Patch-based Texture Synthesis Algorithm

• Main Authors: Yu-Le Lin, 林育樂
• Other Authors: Meng-Dar Shieh
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/13991490102429258832

碩士 === 國立成功大學 === 工業設計學系碩博士班 === 94 === The purpose of this study is to apply a Rotating Patch-based Texture Synthesis (RPBS) methodology to Web3D large-scale landscape graphics design. It solves the problem of Web3D landscapes needing large textures to construct a flexible surface. RPBS improves Patch-Based Sampling (PBS). To compare these two methods, the Fourier spectrum analysis was used to extract the directionality properties of these textures. This was done by using Principle Component Analysis (PCA), which reveals the ratio of the characteristics' values. It was concluded that texture changes of the RPBS synthesis lead to images with better visual effects, which are more suitable for flexible texture applications; whereas PBS works better in structural texture applications. Additionally, it was found that, despite the limited size of the pixels (64 x 64), using RPBS yields a better quality product compared to that of PBS in terms of having a lower re-selection frequency as well as better matching of the overlapping edges. Finally, it was proposed to use RPBS calculation and the instant synthesis methods in the Web3D applications. The instant synthesis method enables the completion of the expected results quickly, which makes it more suitable for the Web3D application. In the future, it is likely that RPBS will be applied to other 3D/VR fields, such as 3D geology information systems and 3D web-based games, etc.