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You searched for subject:(espectrometria urbana). One record found.

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1. Romero da Costa Moreira. Spectral study of urban materials using HSS (Hyperspectral Scanner System) image.

Degree: 2008, Instituto Nacional de Pesquisas Espaciais

Images acquired with 3 meters of spatial resolution by the airborne HSS (Hyperspectral Scanner System) sensor and field/laboratory reflectance data were used for the spectral characterization and discrimination of urban materials in São José dos Campos city (State of São Paulo, Brazil). HSS data (37 bands between 400 and 2400 nm) were converted from radiance values into atmospherically corrected surface reflectance images using the MODTRAN 4 based radiative transfer code. The flight campaign on May 2006 was preceded by system functioning and sensor calibration tests: assessment of the sensor spatial, spectral and radiometric calibrations, and of the signal-to-noise ratio. A spectral library of urban materials was acquired from field/laboratory measurements and from selected pixel spectra. The influence of band positioning and bandwidth, especially the shortwave infrared (SWIR) interval, on the discrimination of urban materials was investigated through spectral resolution simulation of selected multispectral sensors (QuickBird, HRG/Spot-5 and ETM+/Landsat-7) and from classification information derived from logistic regression analysis. To evaluate the spatial resolution influence on the discrimination of these materials, the HSS image was degraded from 3 to 9 meters of spatial resolution using texture filtering. Finally, spectral identification of specific urban materials of the study area was tested with the Spectral Angle Mapper (SAM) and Spectral Feature Fitting (SFF) techniques. Results showed that: (1) the sensor spatial calibration was adequate with a noise below 1.5% in 33 of all 37 available bands in reflective interval when using a scanner frequency up to 25 Hz for imaging. However, spectral tests indicated a deviation of around +17 nm from the original spectral positioning of bands near 940 nm; (2) despite the persistent artifacts in water vapor (940 nm) and CO2 (2050 nm) absorption features, the atmospheric correction was adequate after a small spectral adjustment (less than 17 nm) of the original spectral calibration in the visible/near infrared (VNIR) bands; (3) reflectance pixel spectra of urban materials matched the field measurements, confirming the general featureless nature of the urban spectra, except for signatures of clay ceramic roofs, plastic materials (e.g., PVC and PET) and painted surfaces; (4) a decrease in logistic regression classification accuracy was observed after the simulation of multispectral sensors, but the major impact on classification was due to the absence of the SWIR bands; (5) from the original 3 meters to the degraded 9 meters of spatial resolution, a decrease in classification accuracy was observed only for small objects because of the prevalent and coupled spectral mixture effects of neighboring materials; and, (6) the SAM technique was easily applied over the data and showed better potential of discrimination of urban materials than the SFF technique.

Estudou-se a caracterização espectral e discriminação de alvos urbanos da cidade de São José dos Campos SP, com imagens…

Advisors/Committee Members: Evlyn Marcia Leão de Moraes Novo, Lênio Soares Galvão, Flávio Jorge Ponzoni, David Fernandes, Waterloo Pereira Filho.

Subjects/Keywords: sensoriamento remoto hiperespectral; sensor HSS; espectrometria urbana; discriminação espectral; regressão logística; spectral angle mapper (SAM); spectral feature fitting (SFF); hyperspectral remote sensing; HSS sensor; urban spectrometry; spectral discrimination; logistic regression; spectral angle mapper (SAM); spectral feature fitting (SFF)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Moreira, R. d. C. (2008). Spectral study of urban materials using HSS (Hyperspectral Scanner System) image. (Thesis). Instituto Nacional de Pesquisas Espaciais. Retrieved from http://urlib.net/sid.inpe.br/[email protected]/2008/07.03.20.00

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Moreira, Romero da Costa. “Spectral study of urban materials using HSS (Hyperspectral Scanner System) image.” 2008. Thesis, Instituto Nacional de Pesquisas Espaciais. Accessed October 01, 2020. http://urlib.net/sid.inpe.br/[email protected]/2008/07.03.20.00.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Moreira, Romero da Costa. “Spectral study of urban materials using HSS (Hyperspectral Scanner System) image.” 2008. Web. 01 Oct 2020.

Vancouver:

Moreira RdC. Spectral study of urban materials using HSS (Hyperspectral Scanner System) image. [Internet] [Thesis]. Instituto Nacional de Pesquisas Espaciais; 2008. [cited 2020 Oct 01]. Available from: http://urlib.net/sid.inpe.br/[email protected]/2008/07.03.20.00.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Moreira RdC. Spectral study of urban materials using HSS (Hyperspectral Scanner System) image. [Thesis]. Instituto Nacional de Pesquisas Espaciais; 2008. Available from: http://urlib.net/sid.inpe.br/[email protected]/2008/07.03.20.00

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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