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基于离散余弦变换的单像素相机测量矩阵的性能评估 被引量:1
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作者 程涛 吴小龙 杨明 《探测与控制学报》 CSCD 北大核心 2021年第2期81-85,共5页
采集可压缩信号时,单像素相机的测量矩阵和稀疏变换基共同构成重构矩阵。针对0-1循环测量矩阵,尽管利于编程和硬件实现,但相应重构矩阵重构能力很差的问题,对比分析了基于0-1随机矩阵和0-1循环矩阵的重构矩阵,及其优化前后的重构效果,... 采集可压缩信号时,单像素相机的测量矩阵和稀疏变换基共同构成重构矩阵。针对0-1循环测量矩阵,尽管利于编程和硬件实现,但相应重构矩阵重构能力很差的问题,对比分析了基于0-1随机矩阵和0-1循环矩阵的重构矩阵,及其优化前后的重构效果,并给出相应的理论分析和比较评估。该理论分析和比较评估为单像素相机测量矩阵的选型和设计提供了方向指导,利于设计制造出性能更优的单像素相机。实验表明,对于可压缩信号,单像素相机不能使用0-1循环矩阵作为测量矩阵,但可使用0-1随机矩阵作为测量矩阵,并能对相应重构矩阵作有效优化。 展开更多
关键词 单像素相机 离散余弦变换 测量矩阵 数字微镜 0-1循环矩阵
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An Approach to the Maximum Independent Set for Surface Matching
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作者 HU Zhi-ming WANG Zhong-qi SHI Lei 《International Journal of Plant Engineering and Management》 2010年第3期141-148,共8页
In order to resolve the problem of surface match in the process of surface detection for aircraft thin-walled and composite parts, an efficient approach of 3D surface matching was proposed which is based on the Maximu... In order to resolve the problem of surface match in the process of surface detection for aircraft thin-walled and composite parts, an efficient approach of 3D surface matching was proposed which is based on the Maximum Independent Set (MIS) algorithm of free surface matching. First, to introduce the MIS, this paper described the approach in detail. The MIS of matching points was finally solved by converting the surface matching into a sur- face matching of discrete points, establishing the distance matrix of discrete points, and constructing a 0-1 matrix using the error radius. Second, a validation case was used to show that the algorithm demonstrates good overall local and global surface matching efficiency. 展开更多
关键词 surface matching MIS free surface 0-1 matrix
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