Data/hora: 06/06/2024 15:41:33

Biblioteca(s): | Embrapa Territorial.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 2
Data corrente: | 17/05/2012
Data da última atualização: | 16/09/2014
Autoria: | LI, G.; LU, D.; DUTRA, L.; BATISTELLA, M.
Afiliação: | GUIYING LI, INDIANA UNIVERSITY; DENGSHENG LU, INDIANA UNIVERSITY; LUCIANO DUTRA, INPE; MATEUS BATISTELLA, CNPM.
Título: | A comparative analysis of ALOS PALSAR L-band and RADARSAT-2 C-band data for land-cover classification in a tropical moist region.
Ano de publicação: | 2012
Fonte/Imprenta: | ISPRS Journal of Photogrammetry and Remote Sensing, v. 70, p. 26-38, 2012.
Páginas: | p. 26-38.
Idioma: | Inglês
Conteúdo: | This paper explores the use of ALOS (Advanced Land Observing Satellite) PALSARL-band (Phased Array type L-band Synthetic Aperture Radar) and RADARSAT-2 C-band data for land-cover classification in a tropical moist region. Transformed divergence was used to identify potential textural images which were calculated with the gray-level co-occurrence matrix method. The standard deviation of selected textural images and correlation coefficients between them were then used to determine the best combination of texture images for land-cover classification. Classification results based on different scenarios with maximum likelihood classifier were compared. Based on the identified best scenarios, different classification algorithms ? maximum likelihood classifier, classification tree analysis, Fuzzy ARTMAP (a neural-network method), k-nearest neighbor, object-based classification, and support vector machine were compared for examining which algorithm was suitable for land-cover classification in the tropical moist region. This research indicates that the combination of radiometric images and their textures provided considerably better classification accuracies than individual datasets. The L-band data provided much better landcover classification than C-band data but neither L-band nor C-band was suitable for fine land-cover classification system, no matter which classification algorithm was used. L-band data provided reasonably good classification accuracies for coarse land-cover classification system such as forest, succession, agropasture, water, wetland, and urban with an overall classification accuracy of 72.2%, but C-band data provided only 54.7%. Compared to the maximum likelihood classifier, both classification tree analysis and Fuzzy ARTMAP provided better performances, object-based classification and support vector machine had similar performances, and k-nearest neighbor performed poorly. More research should address the use of multitemporal radar data and the integration of radar and optical sensor data for improving land-cover classification.
Palavras-Chave: | ALOS PALSAR; Amazon; Land-cover classification; RADARSAT.
Thesaurus Nal: | texture.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/59517/1/MateusISPRS.pdf
Registro original: | Embrapa Territorial (CNPM)
Exemplares: | CNPM - (3318-1) - UPC - AP - PP - 12/002 - AP - 2012.002 - DIS