This paper proposed an efficient method of image overlapping relationship analysis based on spatial index of KD tree fast search for disordered and large-scale asteroid images.In this study,the image data from asteroi...This paper proposed an efficient method of image overlapping relationship analysis based on spatial index of KD tree fast search for disordered and large-scale asteroid images.In this study,the image data from asteroid exploration missions such as Bennu,Vesta,and Ryugu were used for experiments,and the proposed image matching pairs determination algorithm was comprehensively compared with the corresponding modules of USGS ISIS in order to evaluate its performance in terms of efficiency and accuracy.The results show that when processing more than a thousand images,the proposed method greatly improves the efficiency of acquiring image matching pairs while ensuring the correctness of image overlapping relationships and accuracy of bundle adjustment.At the same time,according to the obtained image matching pairs,images that meet the requirements of Stereo Photoclinometry can be quickly selected,effectively improving the quality of 3D reconstruction models of asteroid images.展开更多
Several different strategies of 3D modeling are a do pted for different kinds of manmade objects.Firstly,for those manmade objects with regular structure,if 2D information is available and elevation information can be...Several different strategies of 3D modeling are a do pted for different kinds of manmade objects.Firstly,for those manmade objects with regular structure,if 2D information is available and elevation information can be obtained conveniently,then 3D modeling of them can be executed directly.Secondly,for those manmade objects with complicated structure comparatively a nd related stereo images pair can be acquired,in the light of topology-based 3 D model we finish 3D modeling of them by integrating automatic and semi-automat ic object extraction.Thirdly,for the most complicated objects whose geometrica l information cannot be got from stereo images pair completely,we turn to topol ogical 3D model based on CAD.展开更多
The application of bio-orthogonality has greatly facilitated numerous aspects of biological studies in recent years.In particular,bioorthogonal chemistry has transformed biological research,including in vitro conjugat...The application of bio-orthogonality has greatly facilitated numerous aspects of biological studies in recent years.In particular,bioorthogonal chemistry has transformed biological research,including in vitro conjugate chemistry,target identification,and biomedical imaging.In this review,we highlighted examples of bio-orthogonal in vivo imaging published in recent years.We grouped the references into two major categories:bio-orthogonal chemistry-related imaging and in vivo imaging with bio-orthogonal nonconjugated pairing.Lastly,we discussed the challenges and opportunities of bio-orthogonality for in vivo imaging.展开更多
基金Space Optoelectronic Measurement and Perception Lab(LabSOMP-2023-07)the National Natural Science Foundation ofChina(42241147)+1 种基金the State Key Laboratory of Geo-Information Engineering(SKLGIE2021-Z-3-1)and the Open Program of Collaborativeinnovation Center of Geo-information(2023C002)。
文摘This paper proposed an efficient method of image overlapping relationship analysis based on spatial index of KD tree fast search for disordered and large-scale asteroid images.In this study,the image data from asteroid exploration missions such as Bennu,Vesta,and Ryugu were used for experiments,and the proposed image matching pairs determination algorithm was comprehensively compared with the corresponding modules of USGS ISIS in order to evaluate its performance in terms of efficiency and accuracy.The results show that when processing more than a thousand images,the proposed method greatly improves the efficiency of acquiring image matching pairs while ensuring the correctness of image overlapping relationships and accuracy of bundle adjustment.At the same time,according to the obtained image matching pairs,images that meet the requirements of Stereo Photoclinometry can be quickly selected,effectively improving the quality of 3D reconstruction models of asteroid images.
文摘Several different strategies of 3D modeling are a do pted for different kinds of manmade objects.Firstly,for those manmade objects with regular structure,if 2D information is available and elevation information can be obtained conveniently,then 3D modeling of them can be executed directly.Secondly,for those manmade objects with complicated structure comparatively a nd related stereo images pair can be acquired,in the light of topology-based 3 D model we finish 3D modeling of them by integrating automatic and semi-automat ic object extraction.Thirdly,for the most complicated objects whose geometrica l information cannot be got from stereo images pair completely,we turn to topol ogical 3D model based on CAD.
基金supported by NIH R01AG055413,R21AG065826,R21AG078749,and R21AG059134 awards(C.R.).
文摘The application of bio-orthogonality has greatly facilitated numerous aspects of biological studies in recent years.In particular,bioorthogonal chemistry has transformed biological research,including in vitro conjugate chemistry,target identification,and biomedical imaging.In this review,we highlighted examples of bio-orthogonal in vivo imaging published in recent years.We grouped the references into two major categories:bio-orthogonal chemistry-related imaging and in vivo imaging with bio-orthogonal nonconjugated pairing.Lastly,we discussed the challenges and opportunities of bio-orthogonality for in vivo imaging.
