Correction to: Multimedia Tools and Applications (2021) 81:2467-2488

https://doi.org/10.1007/s11042-021-11564-x

The funder was not acknowledge in the original publication of this article. The original article has been corrected.

Acknowledgements We are grateful to Outbrain for providing the dataset used in the paper, and to NVIDIA Corporation for the donation of the Titan Xp GPU used in this research. This work was funded under grant PID2019-109238GB-C21 from the Spanish Ministry of the Economy and Competitiveness, and IDI-2018-000176 from the Principado de Asturias Regional Government, partially supported with ERDF funds. Pablo Pérez-Núñez acknowledges the support of the Principado de Asturias Regional Government under Severo Ochoa Program (ref. BP19-012).