Correction to: Multimed Tools Appl

https://doi.org/10.1007/s11042-017-5171-2

The authors regret that acknowledgment of the financial support of the first author was omitted from the manuscript. The correct acknowledgement is written below:

Acknowledgements This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (No. 2017R1A2B3011475). This research also was financially supported by Hansung University (Heewon Kye).