A Study of Texture Synthesis
| Autor: | Yueh-Yi Lai, 賴岳益 |
|---|---|
| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 Texture synthesis has been an active research area in computer graphics, vision and image processing. A hybrid texture synthesis approach that combines the strength of Ashikhmin’s and Liang’s algorithms is presented in this thesis. Using patches from the input sample texture to extend the input itself, more suitable valid candidate pixels in the input sample can be more precisely determined. An extra original position array is used to record the valid pixels position in the extended region of input sample texture such that the candidate pixel can be retrieved efficiently. Pasting patches with more global information of texture features to initialize the output texture, the texture synthesis process tends to grow larger pieces in the output texture so that the perceptual similarity is reserved as much as possible. Many classes of textures have been used to test our approach. As the experimental results show, the proposed hybrid approach synthesizes high quality textures from a wide variety of textures effectively and efficiently. Besides, synthesis of transition textures is essential for displaying visually acceptable appearances on a terrain. This investigation presents a novel method for synthesizing the transition texture to be tiled on a terrain. All transition pattern types are recognized for a number of input textures. The proposed modified patch-based sampling texture synthesis approach, using the extra feature map of the input source and target textures for patch matching, can synthesize any transition texture on a succession pattern by initializing the output texture using a portion of the source texture enclosed in a transition cut. The transition boundary is further enhanced to improve the visual effect by tracing out the integral texture elements. Either the Game of Life model or Wang tiles method are exploited to present a good-looking profile of successions on a terrain for tiling transition textures. Experimental results indicate that the proposed method requires few input textures, yet synthesizes numerous tileable transition textures, which are useful for obtaining a vivid appearance of a terrain. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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