Faculty Scholarly Dissemination Grants
Integration of pixel-based and object-based image classification for extraction of water bodies with Landsat imagery
Department
Geology Department
College
College of Liberal Arts and Sciences
Date Range
2012-2013
Disciplines
Social and Behavioral Sciences
Abstract
We propose two new methods for fast extraction of water features in remotely sensed imagery. Our first method is a pixel-based procedure that utilizes indices and band values. Based on their characteristic spectral reflectance curves, water bodies are grouped into three types - clear, green, and turbid. We found that the MNDWI is best suited for identifying clear water. Green water has its maximum reflectance occurring in Landsat Thematic Mapper (TM) band 4 (NIR band), while turbid water has its maximum reflectance in TM band 5 (mid-infrared band). Our second method integrates our pixel-based classification with object-based image segmentation. Two Landsat scenes in Shaanxi Province, China were used as the primary data source. Digital elevation models (DEMs) and their derived slope maps were used as ancillary information. To evaluate the performance of the proposed methods, extraction results of the three existing methods and our two new methods were compared and assessed.
Conference Name
2013 Annual Meeting The Association of American Geographers (AAG)
Conference Location
Los Angeles, CA
ScholarWorks Citation
Sun, Wanxiao; Sun, Fangdi; Gong, Peng; and Chen, Jin, "Integration of pixel-based and object-based image classification for extraction of water bodies with Landsat imagery" (2013). Faculty Scholarly Dissemination Grants. 1040.
https://scholarworks.gvsu.edu/fsdg/1040
