Image Representation on Curved Optimal Triangulation
Image Representation on Curved Optimal Triangulation
复制标题
曲线最优三角剖分的图像表示
DOI:
10.1111/cgf.14495
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发表时间:
2022-03
影响因子:
2.5
通讯作者:
Zhonggui Chen
中科院分区:
文献类型:
--
作者:
Yanyang Xiao;Juan Cao;Zhonggui Chen
Image triangulation aims to generate an optimal partition with triangular elements to represent the given image. One bottleneck in ensuring approximation quality between the original image and a piecewise approximation over the triangulation is the inaccurate alignment of straight edges to the curved features. In this paper, we propose a novel variational method called curved optimal triangulation, where not all edges are straight segments, but may also be quadratic Bézier curves. The energy function is defined as the total approximation error determined by vertex locations, connectivity and bending of edges. The gradient formulas of this function are derived explicitly in closed form to optimize the energy function efficiently. We test our method on several models to demonstrate its efficacy and ability in preserving features. We also explore its applications in the automatic generation of stylization and Lowpoly images. With the same number of vertices, our curved optimal triangulation method generates more accurate and visually pleasing results compared with previous methods that only use straight segments.
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DOI:
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DOI:
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发表时间:
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期刊:
Appl. Math. Comput.
影响因子:
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作者:
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影响因子:
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作者:
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DOI:
10.1145/1661412.1618461
发表时间:
2009-12
期刊:
ACM SIGGRAPH Asia 2009 papers
影响因子:
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作者:
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