Etsuji Kitagawa

Hannan University

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Development of 3D Simulation System for Electric Wave Route of Satellite

Doboku jōhō shisutemu rombunshū/Doboku joho shisutemu ronbunshu (2004)

Hirokazu Muraki Etsuji Kitagawa Shigenori Tanaka Hitoshi Furuta Kazuki Nonaka

Recently, the technology of 3D-GIS (Geography Information System) has developed. And, three-dimensional modeling of the city structure had proceeded rapidly. Furthermore, it became possible that a three-dimensional space can be analyzed by the combination with the attribute information of the three-dimensional model. And, it is easy to express the result of the analysis.In this research, we studied about an electric wave route for satellite simulation system based on the development of 3D-GIS technology. Then, we must consider electric wave route being blocked by structures. Moreover, we verified the result of this system.

10.2208/journalac2003.13.0_87

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Measurement and identify of moving object flow using digital video camera

Yoshito Nishita Etsuji Kitagawa Shigenori Tanaka

Digital video

Video camera

Digital camera

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A Research and Development about the Automatic Creation System of the 3-Dimensional Model Using the Digital Video Camera

Springer eBooks (2007)

Etsuji Kitagawa Shigenori Tanaka Hitoshi Furuta Toshiyuki Sugimachi

Digital camera

Presentation (obstetrics)

Continuation

10.1007/3-540-32391-0_76

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Research of technology for recognizing photography management items from image data of construction fields

Etsuji Kitagawa Shigenori Tanaka Satoshi Abiko Katsuma Wakabayashi Wenyuan Jiang

In recent years, the electronic delivery of various deliverables has been implemented in the construction field through the promotion efforts of the Ministry of Land, Infrastructure, Transport and Tourism. One of these deliverables is the image data of photograph taken at construction site. For the electronic delivery of this data, the photography management items showing the contents photographed in the image data of construction site must be submitted along with the image data of construction site itself. Therefore, in this research, we develop a system for automatically acquiring contents for registering the photography management items from the image data of construction site.

Deliverable

Promotion (chess)

Aerial photography

Christian ministry

10.1109/scis-isis.2012.6505003

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RESEARCH ON SHAPE CHARACTERISTIC OF 3D MODELING SOFTWARE (SfM/MVS) IN UAV AERIAL IMAGES

Journal of Japan Society of Civil Engineers Ser F3 (Civil Engineering Informatics) (2018)

Etsuji Kitagawa Hirokazu Muraki Kyouhei YOSHINAGA Jyunki YAMAGISHI Yakumi TSUMURA

近年,地上分解能が小さい空中写真を容易に撮影できる手段としてUAV(Unmanned Aerial Vehicle)が注目を集めている.このUAV空撮画像を用いた3次元計測には,一般的にSfM(Structure from Motion)とMVS(Multi-View Stereo)を用いた3次元モデリングソフトウェアが利用される.しかし,これらのソフトウェアは,それぞれ傾向が異なることが指摘されている.そこで,本研究では,現在多く利用されているPix4DとPhotoScanの2つのソフトウェアについて,実験から特徴を導き出し,それぞれの違いについて比較した.その結果,SfM処理時に各ソフトウェアにおいてレンズ補正式が異なる点や,PhotoScanが見た目は綺麗であるが変位抽出に弱い傾向があること,Pix4Dは点群のZ値が若干揺れるが変位抽出しやすいことなどの比較結果を得ることができた.

Aerial Survey

3d model

10.2208/jscejcei.74.ii_143

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RESEARCH CONCERNING DETECTION AND MEASUREMENT OF LONG-TERM CHANGES IN STRUCTURES USING RANGE IMAGE SENSOR

Journal of Japan Society of Civil Engineers Ser F3 (Civil Engineering Informatics) (2012)

Etsuji Kitagawa Shigenori Tanaka Yoshinori TSUKADA Satoshi Abiko Katsuma Wakabayashi

近年,国土交通省の推進によって,道路や橋梁などの構造物におけるアセットマネジメントが実施されている.アセットマネジメントでは,構造物の腐食や塗装剥げ,及びひずみや変形などの経年変化をいち早く把握し,最も費用対効果の高い修繕計画を策定することが必要となる.しかし,経年変化の把握は,検査員が目視で行うため手間が掛かる.そこで,本研究では,まず,大規模な構造物の経年変化を検出するために,距離画像センサから取得した画像群と距離画像群からパノラマ画像とパノラマ距離画像を生成する.次に,過去と現在のパノラマ画像とパノラマ距離画像における構造物を位置合わせする.最後に,過去と現在の構造物の色情報と3次元情報を比較することで,構造物の色情報と3次元情報の経年変化を検出するシステムを開発する.最後に,実証実験を行い,その有用性を確認する.

10.2208/jscejcei.68.i_85

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Fundamental Research on Automatic Extraction of Photography Management Categories from Image data of Construction

Proceedings of the Fuzzy System Symposium (2011)

Etsuji Kitagawa Shigenori Tanaka Katsuma Wakabayashi Wenyuan Jiang

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Fundamental Research concerning a Three-Dimensional CAD Engine

Civil-comp proceedings (2012)

Kantaro Monobe Satoshi KUBOTA Etsuji Kitagawa Katsuyuki Nakamura Shinpei Tanaka

It is important for the construction industry in Japan to build an environment where 3D CAD data are used for CALS/EC and IT-based construction to improve productivity. The current use of 3D CAD data in the industry is infrequent because a quality yet affordable 3D CAD engine does not exist. Such an engine must be designed and developed in order to enable low-cost use and quick implementation, leading to its deployment in various stages of the life cycle of construction projects. Here, we propose the design of a suitable 3D CAD engine by investigating the following: situations where 3D CAD is used, seeds accompanying 3D CAD packages, standardization trends, existing products, and IT technologies. Based on the results of the investigation, functional requirements for a 3D CAD engine for the construction field are concluded, and specifications regarding the 3D CAD engine design are provided. Based on these functional requirements and specifications, a design plan for a 3D CAD engine is proposed.

10.4203/ccp.100.63

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A Research on Measurement and Identify of Moving Object Flow Using Digital Video Camera

Doboku jōhō shisutemu rombunshū/Doboku joho shisutemu ronbunshu (2007)

Yoshito Nishita Etsuji Kitagawa Shigenori Tanaka Hitoshi Furuta Toshihiro Yamana

It is necessary for settling on the maintenance plan of a road to predict a traffic volume in the future by analyzing and grasping the current traffic volume. Until now, investigators manually measure the traffic volume with the counter. Recently, with a development of information technology, there are researches that can automatically be measured using the digital video camera. However, the existing researches have a problem that they can' t correctly measure the flow of moving object in case another objects exists. Therefore, automatic measurement of the flow of moving object is not realized.In this research, a direction vector of moving object is calculated. Moving object is identified based on angle and size of direction vector. And, we developed the system that could correctly measure the flow of people based on the result of identify of moving object.

Digital camera

10.2208/journalac2003.16.0_19

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RESEARCH AND DESIGN ABOUT VERSATILE 3D-CAD ENGINE FOR CONSTRUCTION

Journal of Japan Society of Civil Engineers Ser F3 (Civil Engineering Informatics) (2011)

Shigenori Tanaka Satoshi KUBOTA Etsuji Kitagawa Kantaro Monobe Kenji Nakamura

我が国の建設事業においては,CALS/ECや情報化施工,生産性向上のために3次元データを利用する環境を構築することは重要な課題であるが,その要求を満たす3次元CADが存在しない.そのため,国産の3次元CADの開発を支援することを目的とした,汎用3次元CADエンジンの開発が求められている. そこで本研究では,建設事業において3次元CADを迅速かつ低コストに導入し,これを活用できる環境を構築するために,汎用3次元CADエンジンを設計するための調査研究を行った.ここでは,3次元CADの利用場面,標準化動向,汎用3次元CADエンジンに付随するシーズ,既存製品,IT要素技術について調査し,汎用3次元CADエンジンに対する要求を明らかにした.

10.2208/jscejcei.67.ii_41

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