26 April 2017 Automatic cloud-free image generation from high-resolution multitemporal imagery
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J. of Applied Remote Sensing, 11(2), 025005 (2017). doi:10.1117/1.JRS.11.025005
Abstract
The aim of this paper is to document the automatic reconstruction of clouds and their cast shadows for the generation of spontaneous cloud-free images from high-resolution multitemporal images. To apply the proposed technique, a cloud-free reference image, which has the same position as a target image acquired at a different time, is required. First, the cloud region in the target image is detected based on integration of thick and peripheral cloud candidate regions. Next, the detected cloud region is restored using the pixel values of the target image by considering their location relative to the reference images. Finally, the pixel values of the restored image are separately normalized to the values of the reference image to generate a natural-looking cloud-free image. Multitemporal KOMPSAT-2 high-resolution images are used to construct study sites for evaluation of the proposed method in diverse cloud-cover cases. The experimental results show that the proposed method can automatically generate cloud-free images from high-resolution multitemporal images with reasonable qualitative and quantitative performance.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Youkyung Han, Francesca Bovolo, Won Hee Lee, "Automatic cloud-free image generation from high-resolution multitemporal imagery," Journal of Applied Remote Sensing 11(2), 025005 (26 April 2017). http://dx.doi.org/10.1117/1.JRS.11.025005 Submission: Received 1 February 2017; Accepted 11 April 2017
Submission: Received 1 February 2017; Accepted 11 April 2017
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KEYWORDS
Clouds

Image restoration

Target detection

Target acquisition

Spatial resolution

Earth observing sensors

Image sensors

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