Change Detection of Digital Surface Model by ALOS PRISM

• Material Type: 文書・図像類
• Title: Change Detection of Digital Surface Model by ALOS PRISM
• Author/Editor: 高木, 方隆; Takagi, Masataka
• Author Heading: 高木, 方隆; Takagi, Masataka
• Publication, Distribution, etc.: 宇宙航空研究開発機構地球観測研究センター (JAXA)(EORC)
• Publication Date: 2011
• Publication Date (W3CDTF): 2011
• Periodical title: 宇宙航空研究開発機構特別資料 = JAXA Special Publication: Final Reports of the ALOS Research Announcement Programs 1&2, 2011
• No. or year of volume/issue: JAXA-SP-11-007E
• Volume: JAXA-SP-11-007E
• Pages: PI019-1-PI019-7
• ISSN (Periodical Title): ISSN : 1349-113X
• Text Language Code: eng
• Subject Heading: 3D Measurement; Slope Failure; Digital Surface Model; Disaster Monitoring
• Target Audience: 一般
• Note (General): Whole Shikoku island, JAPAN was selected as test area. In Shikoku, many slope failures are occurred by the torrential rain every year. The slope failures induce other serious disaster such as landslide, mudflow and debris flow. Therefore, slope failures must be found immediately. In the case of remote area, finding slope failures is very difficult.; PRISM sensor mounted on ALOS has three lines scanner with 2.5m ground sampling distance. Then, three dimensional (3D) measurements can be carried out in 2.5m spatial resolution. The 3D measurement using PRISM has a potential to detect a big scale slope failure.; For accurate 3D measurement, Ground Control Points (GCP) must be prepared. Authors established GCP database for ALOS data in Shikoku. Now, over 500 points were surveyed by GPS VRS observation. There are about 20 GCP in PRISM coverage. The GCP database is opened to the public through web site of Kochi University of Technology.; There are several geometric transformation models for 3D measurement such as RPC, 3D projection and line scanner DLT. Those geometric transformation models were evaluated using GCP database. The result showed the accurate model was 3D projection. By using 3D projection, Ortho-Mosaic imagery of 36 PRISM scenes and 9 AVNIR2 scenes was generated in whole Shikoku island. Accuracy of the Ortho-Mosaic imagery showed less than 1 pixel. Then, established GCP database has enough accuracy for registration of ALOS data.; 3D measurement using PRISM was carried out using stereo matching. Image correlation method and least squares matching were combined for accurate stereo matching. The result of The 3D measurement showed 5m RMSE in 3D projection and line scanner DLT. In this study, 3D projection was also used for DSM generation. And 5 area were selected for evaluating generated DSM. The RMS error showed bigger in mountainous area rather than plane area. When GCP were prepared in high elevated area, the accuracy will be improve.; For change detection, two scenes of PRISM were used, which were acquired on 2006 and 2009 in kochi area. Digital Surface Models (DSM) of point cloud model were generated. The point cloud model was converted to 10m grid model to compare both DSM. A difference of each DSM was calculated by simple subtraction. The subtractive imagery had a striping noises. The reason of the striping noise was micro pulsation of sensor. The striping noise was eliminated by DFT. However, it was difficult to detect change. Next, Neighbor Correlation Coefficient (NCC) was calculated for change detection. This method can neglect gentle change such as striping noise. The change detection by NCC showed noises of DSM in plane area were detected very much. For accurate change detection, noises should be eliminated.; 形態: カラー図版あり; 形態: DVD-ROM1枚; Physical characteristics: Original contains color illustrations; Note: One DVD-ROM; 資料番号: AA0065135078; レポート番号: JAXA-SP-11-007E
• Source: https://jaxa.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4548&item_no=1&attribute_id=31&file_no=1
• Access Restrictions: 限定公開
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ