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采用彩色分割立体匹配与简化点云的三维目标快速重建
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作者 李鹤喜 张娟娟 孙玲云 《人工智能与机器人研究》 2014年第4期55-61,共7页
本文将彩色分割立体匹配和简化点云技术用于三维目标的快速重建。对于采集的左右两幅三维目标图像,首先采用均值漂移算法进行彩色图像分割,然后按区域匹配算法进行快速立体匹配,获得初始视差,再应用置信传播法进行全局视差优化,从而得... 本文将彩色分割立体匹配和简化点云技术用于三维目标的快速重建。对于采集的左右两幅三维目标图像,首先采用均值漂移算法进行彩色图像分割,然后按区域匹配算法进行快速立体匹配,获得初始视差,再应用置信传播法进行全局视差优化,从而得到精确的视差图与空间点云。应用空间表面曲率准则对获取的密集点云进行简化,并采用Delaunay三角剖分算法进行三维重建。实验结果表明:采用彩色图像分割与置信传播相结合,能够改善立体匹配效率并保证了匹配质量;基于曲率的点云简化,既提高了三维重建速度也得到了满意的重建效果。 展开更多
关键词 均值漂移 图像分割 立体匹配 点云 三维重建
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Mesenchymal stem cell-derived exosomes: Versatile nanomaterials for skin wound treatment 被引量:1
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作者 Yuzhen Xiao hexi li +5 位作者 Junhui Zhang Songyun Yang Chunsen Zhang Yizhou Huang Xin Tang Huiqi Xie 《Nano Research》 SCIE EI CSCD 2024年第4期2836-2856,共21页
Accumulating studies reveal that mesenchymal stem cells(MSCs)promote skin wound healing mainly through the paracrine effects.Exosomes,one of the crucial paracrine mediators in wound healing,are cell-derived nanosized ... Accumulating studies reveal that mesenchymal stem cells(MSCs)promote skin wound healing mainly through the paracrine effects.Exosomes,one of the crucial paracrine mediators in wound healing,are cell-derived nanosized membranous vesicles containing diverse bioactive cargoes.With the potent ability of modulating skin cell behaviors,MSC-derived exosomes(MSC-Exos)are regarded as a promising nanomaterial for regenerative wound therapy.Under hostile conditions,MSC-Exos are efficient in protecting skin cells from severe damage and restoring their function.According to recent studies,MSC-Exos possess remarkable pro-healing effects in a variety of skin wounds,typically resulting in increased wound closure,inhibited scar tissue formation,and better restoration of skin function.To further enhance the therapeutic potential of MSC-Exos,the development of applicable pretreatment strategies and the optimization of exosome delivery are under intensive investigation.Herein,we summarize current research progress of MSC-Exos for skin wound treatment,with an emphasis on the biological effects of these nanovesicles,the repair mechanisms,and future challenges in clinical translation. 展开更多
关键词 EXOSOMES mesenchymal stem cells diabetic wounds burn wounds SCAR wound healing
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