Dr. Hongcai Du Profile

Dr. Hongcai Du

at Tianjin Univ

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Proceedings Article | 18 November 2019 Paper

Cloud and snow detection from remote sensing imagery based on convolutional neural network

Hongcai Du, Kun Li, Jianhua Guo, Jinsong Zhang, Jingyu Yang

Proceedings Volume 11187, 1118717 (2019) https://doi.org/10.1117/12.2538928

KEYWORDS: Clouds, Remote sensing, Earth observing sensors, Satellites, Satellite imaging, Image fusion, Convolutional neural networks, Image segmentation, Convolution, Feature extraction

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Cloud and snow detection is one of the most important tasks in remote sensing (RS) image processing areas. Distinguishing cloud and snow from RS images is a challenging task. Short-wave infrared (SWIR) band has been widely used for ice/snow detection. However, due to the lack of SWIR in high-resolution multispectral images, such as ZY-3 satellite imagery, traditional SWIR-based methods are no longer practical. In order to mitigate the adverse effects of cloud and snow detection, in this work, we propose an effective convolutional neural network (CNN) with a multilevel/ scale feature fusion module (MFFM), a channel and spatial attention module, and an encoder-decoder network structure for cloud and snow detection form ZY-3 satellite imageries. The MFFM can aggregate multiple-level/scale feature maps from the backbone network, ResNet50, for providing representative semantic feature information for cloud and snow detection. Channel and spatial attention module (CSAM) is used to further refine the semantic feature maps that outputs by MFFM thus making the network have better detection performance. The encoder-decoder structure allows the proposed CNN to restore detailed object boundaries thus making the detection results more accuracy. Experimental results on the ZY-3 satellite imageries dataset demonstrate that the proposed network can accurately detect cloud and snow, and outperforms several state-of-the-art methods.

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