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源自样图的树皮纹理合成技术研究
引用本文:曹璐,杨刚,王忠芝,黄心渊.源自样图的树皮纹理合成技术研究[J].计算机工程与应用,2009,45(30):194-197.
作者姓名:曹璐  杨刚  王忠芝  黄心渊
作者单位:1.北京林业大学 信息学院 数字媒体实验室,北京 100083 2.北京林业大学 信息学院 数字媒体教研室,北京 100083 3.北京林业大学 信息学院,北京 100083
基金项目:国家高技术研究发展计划(863),国家自然科学基金,国家科技支撑计划项目 
摘    要:树皮的真实感表达是树木可视化中的一个重要问题。树皮表面纹理具有丰富的细节,并且树干不同部位的纹理质地可能会发生渐变,要真实模拟树皮纹理的这些效果并不简单。提出一种真实感树皮纹理的合成方法。该方法基于块纹理合成的思想,可以根据几块树皮样图纹理,实现树干部分整张树皮纹理的合成。采用这种合成方法,有效避免了采用一般纹理拼接方法所造成的纹理接缝问题。并且,该方法采用一种控制合成概率的策略有效实现了不同质地的树皮纹理之间的渐变,从而能够真实表现出树皮由老到嫩逐渐变化的效果。基于样本及边缘融合的方式实现了树皮疤痕效果的生成。实验表明,该方法可以有效生成带有生长变化特征的真实感树皮纹理,满足真实感绘制的需求。

关 键 词:纹理合成  树皮纹理  纹理渐变  边缘融合  
收稿时间:2008-6-12
修稿时间:2008-9-16  

Bark texture synthesis by patch-based sampling
CAO Lu,YANG Gang,WANG Zhong-zhi,HUANG Xin-yuan.Bark texture synthesis by patch-based sampling[J].Computer Engineering and Applications,2009,45(30):194-197.
Authors:CAO Lu  YANG Gang  WANG Zhong-zhi  HUANG Xin-yuan
Affiliation:1.Lab of Digital Media,School of Information Science & Technology,Beijing Forestry University,Beijing 100083,China 2.Staff Room of Digital Media,School of Information Science & Technology,Beijing Forestry University,Beijing 100083,China 3.School of Information Science & Technology,Beijing Forestry University,Beijing 100083,China
Abstract:Bark textures realization is a major problem in the field of visualization for virtual trees.It is a tough job to simulate abundant details on the bark’s surface and the progressively-variant transition effects across different locations on the trunk.A method for synthesizing realistic bark textures is presented.The method adopts the idea of patch-based sampling strategy,and can generate a whole piece of trunk according to some bark texture samples.The generated bark textures can efficiently avoid the seam problem caused by common texture mapping approach.Furthermore,by controlling the synthesis probability,the method can successfully simulate the progressively-variant transition effects between the old parts of bark to the tender parts.In addition,this paper also simulates the scar effects on the bark by using scar samples and utilizing edge melting method.Experimental results show that the realistic bark textures synthesized by this method can exhibit the features of tree growth change so as to satisfy the need of realistic tree representation.
Keywords:texture synthesis  bark texture  progressively-variant textures  edge melting
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