Texture Synthesis Su chunmiao Texture Synthesis Texture synthesis

纹理合成 Texture Synthesis Su chunmiao

Texture Synthesis • Texture synthesis is the process of algorithmically constructing a large digital image from a small digital sample image by taking advantage of its structural content. 2

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Texture Synthesis • Image restoration 6

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Texture Synthesis Mainly used for: • Post-production of films: In the post-production of the film, it can present a more realistic scene for us. • Digital image editing: In the image stitching, the image is stitched naturally, reducing defect. • 3 D computer graphics • Image restoration: Fix some valuable paintings or fix some broken images. 8

Texture Synthesis Three phases： • Texture mapping • Process texture synthesis • Sample-based texture synthesis 9

Texture Synthesis • Texture mapping：Applying an image to the surface of a three-dimensional object enhances realism, and can be combined with techniques such as lighting calculation and image blending to form many very beautiful effects. 10

Texture Synthesis • BUT： Texture mapping usually only has one-to-one mapping of texture surface and spatial parameters, and the surface texture will be deformed, distorted, seamed and so on. 11

Texture Synthesis • Process texture synthesis：By directly simulating the physical generation process to generate textures on the surface, such as hair, clouds, wood grain, etc. , the distortion caused by texture mapping is avoided. • BUT: This method requires parameter adjustment and repeated testing for different textures, and sometimes even fails to obtain valid parameters, so there are certain defects. 12

Texture Synthesis • Sample-based texture synthesis：By sampling in the sample image, the texture feature data is obtained and the corresponding mathematical model is established, and then the mathematical model is optimized. Finally, the texture synthesis is performed through the model and the sample image to form the continuity and similarity of the visual texture. Based on a given small-area texture sample, the texture of the entire surface is stitched together according to the geometry of the surface, which is visually similar and continuous. 13

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Texture Synthesis • Sample-based texture synthesis technology can overcome the shortcomings of traditional texture mapping methods, and avoid the cumbersome process texture synthesis adjustment parameters, so it is concerned by more and more researchers. 16

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