Mars orbiting,landing and roving are expected to be achieved during China’s first Mars exploration mission,disclosed at the working meeting of the rover system for the mission held on March 1,2017.The mission,covers ...Mars orbiting,landing and roving are expected to be achieved during China’s first Mars exploration mission,disclosed at the working meeting of the rover system for the mission held on March 1,2017.The mission,covers a complicated process,requiring large technical leaps,many critical links and huge engineering challenges,is of great significance in promoting advancement of space technology and展开更多
A new object-oriented method has been developed for the extraction of Mars rocks from Mars rover data. It is based on a combination of Mars rover imagery and 3D point cloud data. First, Navcam or Pancam images taken b...A new object-oriented method has been developed for the extraction of Mars rocks from Mars rover data. It is based on a combination of Mars rover imagery and 3D point cloud data. First, Navcam or Pancam images taken by the Mars rovers are segmented into homogeneous objects with a mean-shift algorithm. Then, the objects in the segmented images are classified into small rock candidates, rock shadows, and large objects. Rock shadows and large objects are considered as the regions within which large rocks may exist. In these regions, large rock candidates are extracted through ground-plane fitting with the 3D point cloud data. Small and large rock candidates are combined and postprocessed to obtain the final rock extraction results. The shape properties of the rocks （angularity, circularity, width, height, and width-height ratio） have been calculated for subsequent ~eological studies.展开更多
Mars may once have been a wet place where life could flourish,according toNASA scientists who say a robot rover has found evidence that rocks on the RedPlanet“were once soaked with liquid water.” 【原译】据美国宇航...Mars may once have been a wet place where life could flourish,according toNASA scientists who say a robot rover has found evidence that rocks on the RedPlanet“were once soaked with liquid water.” 【原译】据美国宇航局的科学家报道:火星过去可能有丰富的水资源,生物能在那里蓬勃生长。展开更多
尽管人类生存的地球麻烦不断,但是人类探索外层空间的努力始终没有松懈。前不久,又一颗“流浪者”挣脱地球之引力飞往火星。就凭这一句(Afternine balloons have deployed,completely enveloping the landing craft,it will bouncealong...尽管人类生存的地球麻烦不断,但是人类探索外层空间的努力始终没有松懈。前不久,又一颗“流浪者”挣脱地球之引力飞往火星。就凭这一句(Afternine balloons have deployed,completely enveloping the landing craft,it will bouncealong like a toy on the Martian surface as much as a mile before coming to rest.)便足以让我们展开想象之翅膀!展开更多
文摘Mars orbiting,landing and roving are expected to be achieved during China’s first Mars exploration mission,disclosed at the working meeting of the rover system for the mission held on March 1,2017.The mission,covers a complicated process,requiring large technical leaps,many critical links and huge engineering challenges,is of great significance in promoting advancement of space technology and
基金supported by the National Natural Science Foundation of China(Nos.41171355and41002120)
文摘A new object-oriented method has been developed for the extraction of Mars rocks from Mars rover data. It is based on a combination of Mars rover imagery and 3D point cloud data. First, Navcam or Pancam images taken by the Mars rovers are segmented into homogeneous objects with a mean-shift algorithm. Then, the objects in the segmented images are classified into small rock candidates, rock shadows, and large objects. Rock shadows and large objects are considered as the regions within which large rocks may exist. In these regions, large rock candidates are extracted through ground-plane fitting with the 3D point cloud data. Small and large rock candidates are combined and postprocessed to obtain the final rock extraction results. The shape properties of the rocks （angularity, circularity, width, height, and width-height ratio） have been calculated for subsequent ~eological studies.
文摘Mars may once have been a wet place where life could flourish,according toNASA scientists who say a robot rover has found evidence that rocks on the RedPlanet“were once soaked with liquid water.” 【原译】据美国宇航局的科学家报道:火星过去可能有丰富的水资源,生物能在那里蓬勃生长。
文摘尽管人类生存的地球麻烦不断,但是人类探索外层空间的努力始终没有松懈。前不久,又一颗“流浪者”挣脱地球之引力飞往火星。就凭这一句(Afternine balloons have deployed,completely enveloping the landing craft,it will bouncealong like a toy on the Martian surface as much as a mile before coming to rest.)便足以让我们展开想象之翅膀!
