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您的检索式：作者名="Shiming Ge"
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| 1 | 3D textured model encryption via 3D Lu chaotic mapping显示文摘In the emerging Virtual/Augmented Reality(VR/AR) era, three dimensional(3 D) content will be popularized just as images and videos today. The security and privacy of these 3 D contents should be taken into consideration. 3 D contents contain surface models and solid models. Surface models include point clouds,meshes and textured models. Previous work mainly focused on the encryption of solid models, point clouds and meshes. This work focuses on the most complicated 3 D textured model. We propose a 3 D Lu chaotic mapping based encryption method for 3 D textured models. We encrypt the vertices, polygons, and textures of3 D models separately using the 3 D Lu chaotic mapping. Then the encrypted vertices, polygons and textures are composited together to form the final encrypted 3 D textured model. The experimental results reveal that our method can encrypt and decrypt 3 D textured models correctly. Furthermore, typical statistic and brute-force attacks can be resisted by the proposed method. | Xin JIN Shuyun ZHU Chaoen XIAO Hongbo SUN Xiaodong LI Geng ZHAO Shiming GE | 2017 | Science China(Information Sciences)2017，60，12： | 1 |
| 2 | Green strategy of scaleably synthesizing copper nanocomposites with remarkable catalytic activity for wastewater treatment显示文摘The functional copper nanocomposites(Cu NCs)have received increasing attention in the environmental catalysis application for wastewater treatment due to their superior catalytic activity and reactivity.However,overcoming the pH limitations towards the neutral and alkaline wastewater remains a tricky challenge.In this work,we demonstrate a green strategy to synthesize Cu NCs with coexistence of active Cu,Cu_(2)O and ZrO_(2)by self-propagating combustion of metallic glassy ribbons,which exhibit the extremely superior catalytic performance for degradation reaction,providing full conversion of organic dyes completely to the environmental friendly small species(efficiency>99%)under acidic,neutral and alkaline conditions.Compared with all other catalysts developed thus far,the novel Cu NCs catalysts with more active sites present much enhanced catalytic capability of degradation efficiency without the use of any chemical reagents for neutral and alkaline organic dye solutions.The possible decomposition pathways of organic dyes for different p H systems were systematically investigated.More importantly,the two kinds of catalytic mechanism related to high reactivity of nanoscale Cu/Cu_(2)O and strong oxidizing capability of activated·OH/·O_(2)^(-)radicals can also be successfully confirmed under different pH conditions.The green synthetic approach can be extended to design the various M-based nanocomposites(M=Fe,Co,Ni,Ag,Pd)as efficient catalysts for the functional applications of many chemical reactions. | Bowen Zhao Hailong Li Zhengkun Li Shaofan Ge Xindong Qin Shiming Zhang Aimin Wang Haifeng Zhang Zhengwang Zhu | 2021 | Journal of Materials Science & Technology2021，，36： | 0 |
| 3 | Image editing by object-aware optimal boundary searching and mixed-domain composition显示文摘When combining very different images which often contain complex objects and backgrounds,producing consistent compositions is a challenging problem requiring seamless image editing. In this paper, we propose a general approach, called objectaware image editing, to obtain consistency in structure,color, and texture in a unified way. Our approach improves upon previous gradient-domain composition in three ways. Firstly, we introduce an iterative optimization algorithm to minimize mismatches on the boundaries when the target region contains multiple objects of interest. Secondly, we propose a mixeddomain consistency metric for measuring gradients and colors, and formulate composition as a unified minimization problem that can be solved with a sparse linear system. In particular, we encode texture consistency using a patch-based approach without searching and matching. Thirdly, we adopt an objectaware approach to separately manipulate the guidance gradient fields for objects of interest and backgrounds of interest, which facilitates a variety of seamless image editing applications. Our unified method outperforms previous state-of-the-art methods in preserving global texture consistency in addition to local structure continuity. | Shiming Ge Xin Jin Qiting Ye Zhao Luo Qiang Li | 2018 | Computational Visual Media2018，4，1： | 0 |
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