Segmentation of photospheric magnetic elements corresponding to coronal features to understand the EUV and UV irradiance variabilityJ. J. Zender, R. Kariyappa, G. Giono, M. Bergmann, V. Delouille, L. Damé, J.-F. Hochedez and S. T. KumaraA&A, 605 (2017) A41DOI: https://doi.org/10.1051/0004-6361/201629924