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面泊松融合结合色彩变换的无缝纹理辐射处理

DOI: 10.11834/jig.20140403

Keywords: 纹理映射,无缝纹理,辐射处理,泊松融合,色彩变换

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Abstract:

目的消除3维模型纹理接缝上的辐射差异,实现接缝处色彩的自然、连续的过渡。方法本文在标准的泊松融合(Poissonblending)基础上,结合色彩变换技术(colortransfer),提出了一种新的以面为基元的泊松融合无缝纹理辐射处理方法。首先以影像上的纹理三角形为处理单元,以色彩变换参数为未知数,根据模型的三角网边邻接拓扑关系建立泊松方程组,然后全局最小二乘解求局部色彩变换参数,最后进行全局最优解下的局部色彩变换。结果既保证了色彩的均匀过渡,又能更好地改正影像间的整体色差。结论相比使用标准的像素级泊松融合方法进行无缝纹理处理,本文方法拥有计算上的优势,更适合于复杂模型的处理,且有更好的整体色差改正与过渡效果。理论分析和大量实验表明了本文方法的优越性。

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