Erratum to: Multimed Tools Appl

https://doi.org/10.1007/s11042-017-4573-5

In the original publication, the photo of Aissam Berrahou was missing including the photo and biography of Hassan Qjidaa. The authors would like to present the missing photos and biography below.

figure a

Aissam Berrahou

figure b

Hassan Qjidaa received his M.Sc and PhD in applied physics from Claud Bernard University of Lyon France in 1983 and 1987 respectively. He got the Pr. Degree in Electrical Engeneering from Sidi Mohammed Ben Abdellah University, Fès, Morocco 1999. He is now professor in the Dept. of Physics in Sidi Mohammed Ben Abdellah University Fez, Morocco. His main research interest include Image Manuscripts Recognition, Cognitive Science, Image Processing, Computer Graphics, Pattern Recognition, Neural Networks, Human-machine Interface, Artificial Intelligence, Robotics and so on.