Measurement of out-of-plane deformation is significant to understanding of the deflection mechanisms of the plate and tube structures.In this study,a new surface contouring technique with color structured light is app...Measurement of out-of-plane deformation is significant to understanding of the deflection mechanisms of the plate and tube structures.In this study,a new surface contouring technique with color structured light is applied to measure the out-of-plane deformation of structures with one-shot projection.Through color fringe recognizing,decoding and triangulation processing for the captured images corresponding to each deformation state,the feasibility of the method is testified by the measurement of elastic deflections of a flexible square plate,showing good agreement with those from the calibrated displacement driver.The plastic deformation of two alloy aluminum rectangular tubes is measured to show the technique application to surface topographic evaluation of the buckling structures with large displacements.展开更多
大气辐射传输会引起卫星传感器获取的信息与实际信息存在出入,进而导致彩钢板建筑信息提取的不准确。据此,文章以兰州市安宁区为例,利用地物光谱仪和卫星影像获取典型彩钢板光谱数据,确定彩钢板反射率影响因素,结合影响因素测试彩钢板...大气辐射传输会引起卫星传感器获取的信息与实际信息存在出入,进而导致彩钢板建筑信息提取的不准确。据此,文章以兰州市安宁区为例,利用地物光谱仪和卫星影像获取典型彩钢板光谱数据,确定彩钢板反射率影响因素,结合影响因素测试彩钢板反射率并分析光谱特征。然后将实测光谱数据分别与影像经FLAASH(Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes)模型和6S(Second Simulation of the Satellite Signal in the Solar Spectrum)模型大气校正后的光谱信息进行光谱匹配,以确定适合不同颜色彩钢板光谱数据的大气校正方法。结果表明,彩钢板光谱反射率曲线均能反映彩钢板表面颜色特性;FLAASH大气校正更能反映蓝、红彩钢板建筑的真实反射率;6S模型大气校正更能反映白色彩钢板建筑的真实反射率。本研究将为后续彩钢板建筑信息自动解译提供技术支持。展开更多
文摘Measurement of out-of-plane deformation is significant to understanding of the deflection mechanisms of the plate and tube structures.In this study,a new surface contouring technique with color structured light is applied to measure the out-of-plane deformation of structures with one-shot projection.Through color fringe recognizing,decoding and triangulation processing for the captured images corresponding to each deformation state,the feasibility of the method is testified by the measurement of elastic deflections of a flexible square plate,showing good agreement with those from the calibrated displacement driver.The plastic deformation of two alloy aluminum rectangular tubes is measured to show the technique application to surface topographic evaluation of the buckling structures with large displacements.
文摘大气辐射传输会引起卫星传感器获取的信息与实际信息存在出入,进而导致彩钢板建筑信息提取的不准确。据此,文章以兰州市安宁区为例,利用地物光谱仪和卫星影像获取典型彩钢板光谱数据,确定彩钢板反射率影响因素,结合影响因素测试彩钢板反射率并分析光谱特征。然后将实测光谱数据分别与影像经FLAASH(Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes)模型和6S(Second Simulation of the Satellite Signal in the Solar Spectrum)模型大气校正后的光谱信息进行光谱匹配,以确定适合不同颜色彩钢板光谱数据的大气校正方法。结果表明,彩钢板光谱反射率曲线均能反映彩钢板表面颜色特性;FLAASH大气校正更能反映蓝、红彩钢板建筑的真实反射率;6S模型大气校正更能反映白色彩钢板建筑的真实反射率。本研究将为后续彩钢板建筑信息自动解译提供技术支持。
