为了实现番茄可溶性固形物含量（soluble solids content,SSC）的有效检测,提出高光谱漫透射成像检测方法,对比该成像方式下不同姿态（果脐端面姿态BS、赤道圆周3姿态C1、C2、C3以及组合姿态C1C2C3）的检测效果。首先对采集的不同姿态...为了实现番茄可溶性固形物含量（soluble solids content,SSC）的有效检测,提出高光谱漫透射成像检测方法,对比该成像方式下不同姿态（果脐端面姿态BS、赤道圆周3姿态C1、C2、C3以及组合姿态C1C2C3）的检测效果。首先对采集的不同姿态光谱图像,通过剪裁消除图像边缘噪声。针对圆周赤道面姿态C1、C2和C3,进行了拼接处理,获得组合姿态图像C1C2C3。其后对以上5种姿态图像进行单波段背景分割,获取目标区域,并统计不同姿态下番茄漫透射平均光谱。最后利用漫透射光谱结合偏最小二乘回归（partial least squares,PLS）方法,对番茄SSC分别在450~720、720~990、450~990 nm 3个波段进行定量分析。结果表明,组合姿态C1C2C3在3个波段区域上整体检测效果优于单个姿态的检测效果,其模型验证集均方根误差（root mean squared error of prediction,RMSEP）分别为0.299%、0.133%、0.151%;相关系数rp分别为0.42,0.89,0.90。说明利用高光谱漫透射成像,获取组合姿态光谱图像,可以有效检测番茄SSC。展开更多
The geometric accuracy of topographic mapping with high-resolution remote sensing images is inevita-bly affected by the orbiter attitude jitter.Therefore,it is necessary to conduct preliminary research on the stereo m...The geometric accuracy of topographic mapping with high-resolution remote sensing images is inevita-bly affected by the orbiter attitude jitter.Therefore,it is necessary to conduct preliminary research on the stereo mapping camera equipped on lunar orbiter before launching.In this work,an imaging simulation method consid-ering the attitude jitter is presented.The impact analysis of different attitude jitter on terrain undulation is conduct-ed by simulating jitter at three attitude angles,respectively.The proposed simulation method is based on the rigor-ous sensor model,using the lunar digital elevation model(DEM)and orthoimage as reference data.The orbit and attitude of the lunar stereo mapping camera are simulated while considering the attitude jitter.Two-dimensional simulated stereo images are generated according to the position and attitude of the orbiter in a given orbit.Experi-mental analyses were conducted by the DEM with the simulated stereo image.The simulation imaging results demonstrate that the proposed method can ensure imaging efficiency without losing the accuracy of topographic mapping.The effect of attitude jitter on the stereo mapping accuracy of the simulated images was analyzed through a DEM comparison.展开更多
文摘为了实现番茄可溶性固形物含量（soluble solids content,SSC）的有效检测,提出高光谱漫透射成像检测方法,对比该成像方式下不同姿态（果脐端面姿态BS、赤道圆周3姿态C1、C2、C3以及组合姿态C1C2C3）的检测效果。首先对采集的不同姿态光谱图像,通过剪裁消除图像边缘噪声。针对圆周赤道面姿态C1、C2和C3,进行了拼接处理,获得组合姿态图像C1C2C3。其后对以上5种姿态图像进行单波段背景分割,获取目标区域,并统计不同姿态下番茄漫透射平均光谱。最后利用漫透射光谱结合偏最小二乘回归（partial least squares,PLS）方法,对番茄SSC分别在450~720、720~990、450~990 nm 3个波段进行定量分析。结果表明,组合姿态C1C2C3在3个波段区域上整体检测效果优于单个姿态的检测效果,其模型验证集均方根误差（root mean squared error of prediction,RMSEP）分别为0.299%、0.133%、0.151%;相关系数rp分别为0.42,0.89,0.90。说明利用高光谱漫透射成像,获取组合姿态光谱图像,可以有效检测番茄SSC。
基金Supported by the National Natural Science Foundation of China(42221002,42171432)Shanghai Municipal Science and Technology Major Project(2021SHZDZX0100)the Fundamental Research Funds for the Central Universities.
文摘The geometric accuracy of topographic mapping with high-resolution remote sensing images is inevita-bly affected by the orbiter attitude jitter.Therefore,it is necessary to conduct preliminary research on the stereo mapping camera equipped on lunar orbiter before launching.In this work,an imaging simulation method consid-ering the attitude jitter is presented.The impact analysis of different attitude jitter on terrain undulation is conduct-ed by simulating jitter at three attitude angles,respectively.The proposed simulation method is based on the rigor-ous sensor model,using the lunar digital elevation model(DEM)and orthoimage as reference data.The orbit and attitude of the lunar stereo mapping camera are simulated while considering the attitude jitter.Two-dimensional simulated stereo images are generated according to the position and attitude of the orbiter in a given orbit.Experi-mental analyses were conducted by the DEM with the simulated stereo image.The simulation imaging results demonstrate that the proposed method can ensure imaging efficiency without losing the accuracy of topographic mapping.The effect of attitude jitter on the stereo mapping accuracy of the simulated images was analyzed through a DEM comparison.
