23 October 2010 Waterline extraction in optical images and InSAR coherence maps based on the geodesic time concept
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Abstract
An algorithm for waterline extraction from SAR images is presented based on the estimation of the geodesic path, or minimal path (MP) between two pixels on the waterline. For two given pixels, geodesic time is determined in terms of the time shortest path, between them. The MP is determined by estimating the mean value for all pairs of neighbor pixels that can be part of a possible path connecting the initial given pixels. A MP is computed as the sum of those two geodesic image functions. In general, a MP is obtained with the knowledge of two end pixels. Based on the 2-dimensional spreading of the estimated geodesic time function, the concepts of propagation energy and strong pixels are introduced and tested for the waterline extraction by marking only one pixel in the image.
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Fernando Soares, Fernando Soares, Giovanni Nico, Giovanni Nico, } "Waterline extraction in optical images and InSAR coherence maps based on the geodesic time concept", Proc. SPIE 7830, Image and Signal Processing for Remote Sensing XVI, 783012 (23 October 2010); doi: 10.1117/12.864687; https://doi.org/10.1117/12.864687
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