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Verification study for the mineral and rock identification using multispectral camera of the “Zhurong” Mars Rover on the earth

  • role： First author第一作者
  • Affiliation：

    School of land science and technology, China University of Geosciences, Beijing 100083, China

    Lunar and Planetary Remote Sensing Exploration Research Center, China University of Geosciences, Beijing 100083, China

    International Cooperative Research Center for Lunar and Planetary Exploration, Center of Space Exploration, Ministry of Education, Beijing 100083, China

  • Email：xj_personal@163.com
  • Introduction：谢涓，1999年生，女，硕士研究生，研究方向为计算机视觉与遥感数据处理。E-mail： xj_personal@163.com
XIE Juan123,  
  • Affiliation：

    School of land science and technology, China University of Geosciences, Beijing 100083, China

    Lunar and Planetary Remote Sensing Exploration Research Center, China University of Geosciences, Beijing 100083, China

    International Cooperative Research Center for Lunar and Planetary Exploration, Center of Space Exploration, Ministry of Education, Beijing 100083, China

YAN Kai123,  
  • role： Corresponding author通信作者
  • Affiliation：

    School of land science and technology, China University of Geosciences, Beijing 100083, China

    Lunar and Planetary Remote Sensing Exploration Research Center, China University of Geosciences, Beijing 100083, China

    International Cooperative Research Center for Lunar and Planetary Exploration, Center of Space Exploration, Ministry of Education, Beijing 100083, China

  • Email：zzkang@cugb.edu.cn
  • Introduction：康志忠，1975年生，男，教授，研究方向为数字摄影测量、激光雷达技术与应用、月球与行星遥感。E-mail： zzkang@cugb.edu.cn
KANG Zhizhong123*,  
  • Affiliation：

    School of land science and technology, China University of Geosciences, Beijing 100083, China

    Lunar and Planetary Remote Sensing Exploration Research Center, China University of Geosciences, Beijing 100083, China

    International Cooperative Research Center for Lunar and Planetary Exploration, Center of Space Exploration, Ministry of Education, Beijing 100083, China

XU Xiaojian123,  
  • Affiliation：

    Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

XUE Bin4,  
  • Affiliation：

    Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

YANG Jianfeng4,  
  • Affiliation：

    Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

TAO Jinyou4

resumen

China’s first autonomous Mars exploration mission probe “Tianwen-1” was successfully launched in July 2020, and the rover of “Tianwen-1” successfully landed on the pre-selected landing area in the southern Utopia Plain of Mars on May 15. After landing on Mars, China’s first Mars rover “Zhurong” will carry out inspections and bring the raw scientific data for Chinese Mars exploration. The multispectral camera mounted on the “Zhurong” rover can be used to study the types of mineral and rock near the landing area. Identifying the types of mineral and rock on Mars is of great significance for understanding the Martian atmospheric change, environmental conditions, geological evolution, and future livability. The study in this article selected 18 kinds of common mineral and rock on the surface of Mars, and shot these mineral and rock with the same multispectral camera as on “Zhurong” rover in the earth environment. Then, this study uses the obtained multispectral image carry out the research of mineral and rock identification, hoping to provide guidance for future in-situ identification of mineral and rock on the surface of Mars based on the “Zhurong” multispectral camera data. Considering that 8-band spectral data is not enough to capture the spectral characteristics of all mineral and rock, it will result in fewer mineral and rock identified, this paper uses color features to assist in the identification of mineral and rock. This paper uses band operation based on multispectral image and HSV color feature histogram extraction based on color image to identify different types of mineral and rock. The above method can identify different types of mineral and rock from the perspective of multispectral features and color features. This study collected multispectral images of mineral and rock under three different shooting conditions, and found that the spectral characteristics of mineral and rock may change under different shooting conditions, which will have an impact on mineral and rock identification. The multispectral image data used in this paper was collected under the conditions of the solar elevation angle at about 60 °, the shooting height at 1.8 meters and the shooting angle at about 37°. Under this condition, the research method in this paper has extracted identification indexes of 12 kinds of mineral and rock. The identification indexes corresponding to specific mineral and rock are listed in the article, all results are based on the above shooting condition. The study shows that: using the band operation based on multispectral image, mineral and rock with prominent spectral characteristics under 8 specific bands can be identified; and using color feature histogram extracted from HSV color image, mineral and rock with a relatively concentrated color feature can be identified. In addition, since different shooting conditions will have an impact on the identification of mineral and rock, it is necessary to do the identification research under different conditions in the future.

palabra clave

Tianwen-1;Zhurong;multispectral image;band operation;color feature;mineral and rock identification

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