Journal ArticleDOI
Combining Pixel- and Object-Based Machine Learning for Identification of Water-Body Types From Urban High-Resolution Remote-Sensing Imagery
TLDR
A novel two-level machine-learning framework is proposed for identifying the water types from urban high-resolution remote-sensing images, which achieved satisfactory accuracies for both water extraction and water type classification in complex urban areas.Abstract:
Water is one of the vital components for the ecological environment, which plays an important role in human survival and socioeconomic development. Water resources in urban areas are gradually decreasing due to the rapid urbanization, especially in developing countries. Therefore, the precise extraction and automatic identification of water bodies are of great significance and urgently required for urban planning. It should be noted that although some studies have been reported regarding the water-area extraction, to our knowledge, few papers concern the identification of urban water types (e.g., rivers, lakes, canals, and ponds). In this paper, a novel two-level machine-learning framework is proposed for identifying the water types from urban high-resolution remote-sensing images. The framework consists of two interpretation levels: 1) water bodies are extracted at the pixel level, where the water/shadow/vegetation indexes are considered and 2) water types are further identified at the object level, where a set of geometrical and textural features are used. Both levels employ machine learning for the image interpretation. The proposed framework is validated using the GeoEye-1 and WorldView-2 images, over two mega cities in China, i.e., Wuhan and Shenzhen, respectively. The experimental results show that the proposed method achieved satisfactory accuracies for both water extraction [95.4% (Shenzhen), 96.2% (Wuhan)], and water type classification [94.1% (Shenzhen), 95.9% (Wuhan)] in complex urban areas.read more
Citations
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Journal ArticleDOI
Semantic Labeling of Aerial and Satellite Imagery
TL;DR: This paper proposes an effective approach to semantic pixel labeling of aerial and satellite imagery using both CNN features and hand-crafted features which outperforms all existing algorithms on the International Society of Photogrammetry and Remote Sensing two-dimensional Semantic Labeling Challenge dataset.
Journal ArticleDOI
Water Body Extraction From Very High-Resolution Remote Sensing Imagery Using Deep U-Net and a Superpixel-Based Conditional Random Field Model
TL;DR: An enhanced deep convolutional encoder–decoder (DCED) network (or Deep U-Net) specifically tailored to WBE from remote sensing images by applying superpixel segmentation and conditional random fields (CRFs).
Journal ArticleDOI
Urban surface water body detection with suppressed built-up noise based on water indices from Sentinel-2 MSI imagery.
TL;DR: In this article, the authors proposed a noise-prediction strategy to eliminate misclassified nonwater areas in an automated way by using constrained energy minimization (CEM) to draw the possible distribution of noise based on prior noise samples.
Journal ArticleDOI
Monthly estimation of the surface water extent in France at a 10-m resolution using Sentinel-2 data
Xiucheng Yang,Xiucheng Yang,Qiming Qin,Qiming Qin,Herve Yesou,Thomas Ledauphin,Mathieu Koehl,Pierre Grussenmeyer,Zhe Zhu +8 more
TL;DR: In this article, the authors proposed a rule-based superpixel (RBSP) approach on the Google Earth Engine platform to generate the surface water extent at the national scale and 10m spatial scale.
Journal ArticleDOI
Multilayer Perceptron Neural Network for Surface Water Extraction in Landsat 8 OLI Satellite Images
TL;DR: The proposed multilayer perceptron (MLP) neural network has the potential to map surface water based on Landsat series images or other high-resolution images and can be implemented for global surface water mapping, which will help us better understand the authors' changing planet.
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