Skip to Main content Skip to Navigation
New interface
Journal articles

Automatic Detection of Moroccan Coastal Upwelling Zones using Sea Surface Temperature Images

Abstract : An efficient unsupervised method is developed for automatic segmentation of the area covered by upwelling waters in the coastal ocean of Morocco using the Sea Surface Temperature (SST) satellite images. The proposed approach first uses the two popular unsupervised clustering techniques, k-means and fuzzy c-means (FCM), to provide different possible classifications to each SST image. Then several cluster validity indices are combined in order to determine the optimal number of clusters, followed by a cluster fusion scheme, which merges consecutive clusters to produce a first segmentation of upwelling area. The region-growing algorithm is then used to filter noisy residuals and to extract the final upwelling region. The performance of our algorithm is compared to a popular algorithm used to detect upwelling regions and is validated by an oceanographer over a database of 92 SST images covering each week of the years 2006 and 2007. The results show that our proposed method outperforms the latter algorithm, in terms of segmentation accuracy and computational efficiency.
Complete list of metadata

Cited literature [40 references]  Display  Hide  Download
Contributor : H. Yahia Connect in order to contact the contributor
Submitted on : Wednesday, September 26, 2018 - 1:42:12 PM
Last modification on : Thursday, August 11, 2022 - 1:10:06 PM
Long-term archiving on: : Thursday, December 27, 2018 - 1:41:18 PM


Files produced by the author(s)


  • HAL Id : hal-01881880, version 1



Ayoub Tamim, Khalid Minaoui, Khalid Daoudi, Hussein Yahia, Abderrahman Atillah, et al.. Automatic Detection of Moroccan Coastal Upwelling Zones using Sea Surface Temperature Images. International Journal of Remote Sensing, 2018. ⟨hal-01881880⟩



Record views


Files downloads