基于混合梯度最小化的铅笔画生成

doi:10.12066/j.issn.1007-2861.1780

Journal of Shanghai University（Natural Science Edition） ›› 2018, Vol. 24 ›› Issue (2): 314-321.doi: 10.12066/j.issn.1007-2861.1780

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Pencil drawing production based on hybrid gradient minimization

WANG Quan¹^,², HU Yueli¹^,²^,³(), YAN Ming¹^,², HU Yunsheng¹^,², CHEN Peng¹^,²

1. School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
2. Shanghai Key Laboratory of Power Station Automation Technology, Shanghai 200072, China
3. Microelectronic Research and Development Center, Shanghai University, Shanghai 200072, China

Received:2016-05-01 Online:2018-04-30 Published:2018-05-07
Contact: HU Yueli E-mail:huyueli@shu.edu.cn

Abstract

Abstract:

Algorithms for creating pencil drawing effect from an image have two major problems: details are often missing so that important edge lines are not clearly shown, and lines are monotonous without hierarchical information. To solve these problems, this paper proposes a pencil drawing generation algorithm based on hybrid gradient minimization. By combining $L_0$ gradient minimization and $L_1$ norm, prominent edges are maintained and enhanced without affecting the overall sharpness. This way, rich and hierarchical details in the image are fully retained. Experimental results indicate that the proposed method can generate high quality and more realistic pencil drawing effect. It is superior to several other existing method.

Key words: pencil drawing, non-photorealistic rendering, $L_0$ gradient minimization, tone rendering

CLC Number:

TP391

WANG Quan, HU Yueli, YAN Ming, HU Yunsheng, CHEN Peng. Pencil drawing production based on hybrid gradient minimization[J]. Journal of Shanghai University（Natural Science Edition）, 2018, 24(2): 314-321.

Figures/Tables 7

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References 18

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Pencil drawing production based on hybrid gradient minimization

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