XXII ISPRS Congress 2012: Technical Commission VII

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Multivolume work

Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663821976

Title:: Technical Commission VII

Scope:: 546 Seiten

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663821976

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B7)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VII/3: INFORMATION EXTRACTION FROM HYPERSPECTRAL DATA]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: ANALYSIS OF CONCRETE REFLECTANCE CHARACTERISTICS USING SPECTROMETER AND VNIR HYPERSPECTRAL CAMERA Jin-Duk Lee, Bon A. Dewitt, Sung-Soon Lee, Kon-Joon Bhang, Jung-Bo Sim

Document type:: Multivolume work

Structure type:: Chapter

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B7, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia ANALYSIS OF CONCRETE REFLECTANCE CHARACTERISTICS USING SPECTROMETER AND VNIR HYPERSPECTRAL CAMERA Jin-Duk Lee **, Bon A. Dewitt®, Sung-Soon Lee °, Kon-Joon Bhang *, Jung-Bo Sim * a School of Civil and Environmental Engineering, Kumoh National Institute of Technology, 730-701 Gumi, Korea - jdlee@kumoh.ac.kr, bhang. | @kumoh.ac.kr, mungmungmungv@hanmail.net ^ School of Forest Resources and Conservation, University of Florida, FL32611, Gainesville, United States - bon@ufl.edu ° Korea Institute of Geoscience and Mineral Resources, 305-350 Daejeon, Korea - gisyi@kigam.re.kr Commission VII, WG VII/3 KEY WORDS: Hyperspectral Images, Spectrometer, VNIR Hyperspectral Camera, Reflectance Spectra, Concrete Structures ABSTRACT: The purpose of this research is to extract spectral reflectance characteristics of concretes through basic experiment on concrete specimens and site experiment on actual concrete structures using a field portable spectrometer and a VNIR hyperspectral sensor. À spectrometer (GER-3700) and a VNIR hyperspectral camera (AisaEagle VNIR Hyperspectral Camera) were utilized for extracting spectral characteristics of concrete specimens and actual concrete structures. General concretes show similar pattern with correlation more than 80%, while super high strength concrete shows very different aspect from general concretes. The GER-3700 spectrometer and the VNIR camera were applied to extracting spectral characteristics of the actual concrete structures such as a bridge slab and pier in road construction site. We also made certain in not only interior experiment on concrete specimens but also site experiment on actual concrete structures that both the spectrometer and the VNIR camera vary in spectral reflectance depending on concrete strength. Afterwards if the studies on hyperspectral characteristics of worn-out concretes, concrete aggregate condition diversity, super high-strength concretes are performed in depth, it is helpful in stability evaluation and maintenance management of concrete-based structures or facilities using airborne or satellite hyperspectral images for a wide area. 1. INTRODUCTION Recently necessity of system development and improvement related to concrete characteristics is recognized largely with regulation establishment for maintenance of concrete facilities in construction markets. Concrete structures has been continuously increased with industrial development and along with this, structural monitoring techniques has been advanced. We set to work on this research based on the idea that hyperspectral remote sensing also might be utilized for monitoring concrete structures. If spectral characteristics according to concrete conditions can be understood, hyperspectral imagery may be applied as a useful instrument for surveying the current state for a number of concrete structures or facilities distributed in an urban area. Hyperspectral imagery has been used to detect and map a wide variety of materials having characteristic of reflectance spectra. For example, hyperspectral images have been used by geologists for mineral mapping (Clark et al., 1995) and to detect soil properties including moisture, organic content, and salinity (Ben-Dor, 2001). Vegetation scientists have successfully used hyperspectral imagery to identify vegetation species(Clark et al., 1995), study plant canopy chemistry, and detect vegetation stress. Military personnel have used hyperspectral imagery to detect military vehicles under partial vegetation canopy, and many other military target detection objectives (Peg Shippert, 2003). Lately Yavari et al.(2010) evaluated quality changes of heated oils based on visible/near infrared spectral analysis using a spectrometer. The use of reflectance spectroscopy across the visible near- and short-infrared spectral region (400 to 2500 nm) was suggested as a tool to assess the status of concrete in situ(Anna Brook and Eyal Ben-Dor, 2011). The purpose of this research is to extract spectral reflectance characteristics of concretes through basic experiment and on- site experiment using a spectrometer and a VNIR hyperspectral sensor. In this research, a spectrometer (GER-3700) and a VNIR hyperspectral camera (AisaEagle VNIR Hyperspectral Sensor) were utilized for extracting spectral characteristics of concrete specimens and actual concrete structures. 2. BASIC EXPERIMENT FOR EXTRACTING HYPRSPECTRAL CHARACTERISTICS OF CONCRETES 2.1 Extracting Spectral Characteristics of Concrete Specimens Using Spectrometer For understanding characteristics of concretes, the concrete specimens for compressive strength test were produced not only with different water/cement ratio but also with different concrete curing time. The design compressive strengthes of eight specimens of general concrete were 15MPa(22), *Jin-Duk Lee, School of Civil and Environmental Engineering, Kumoh National Institute of Technology, jdlee@kumoh.ac.kr

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