Japan Geoscience Union Meeting 2014

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Oral

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[U-06_28AM1] New Progress toward the Understanding of Small Solar System Bodies

Mon. Apr 28, 2014 9:00 AM - 10:45 AM 503 (5F)

Convener:*Masahiko Arakawa(Graduate School of Science, Kobe University), Taishi Nakamoto(Tokyo Institute of Technology), Sei-ichiro WATANABE(Division of Earth and Planetary Sciences, Graduate School of Science, Nagoya University), Masanao Abe(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), MASATERU ISHIGURO(Department of Physics and Astronomy, Seoul National University), Chair:Masahiko Arakawa(Graduate School of Science, Kobe University)

10:30 AM - 10:45 AM

[U06-P18_PG] Feature matching in planetary images with multiple spatial resolutions by using SIFT algorithm

3-min talk in an oral session

Hiroyuki KODAMA1, *Chikatoshi HONDA1 (1.The University of Aizu)

Keywords:planetary image, SIFT, feature matching, AMICA

This study uses feature matching in planetary images with multiple spatial resolution. To know where lower altitude images are taken in high altitude images is performed based on images without the position and attitude of spacecraft in this study. The lower altitude images of AMICA on-board the Hayabusa spacecraft, asteroid probe are found as a correspondence of image features (keypoint) in higher altitude images. We adopted the Scale Invariant Features Transform (SIFT) to represent a kind of key-point of image for image feature matching. In generally, the SIFT keypoint is robust to scale transition, change of lighting condition, parallel displacement, and rotation of image, so this keypoint is suitable to feature matching of planetary image which contains of scale and rotation between different images. As a result, for the improvement of accuracy of feature matching, it is important to have a preprocessing of image (e.g., equalizing).