@Moataz

I had some issues too. I solved it by installing opencv beforehand  
from these packages:

http://packages.ros.org/ros/ubuntu/pool/main/libo/libopencv/



David Sanz Kirbis
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Investigador
Laboratorio de Luz
Departamento de Pintura
Universidad Politécnica de Valencia
Facultad de Bellas Artes
Camino de Vera s/n
46022- Valencia
España
Tel:(34)963877690
Fax:(34)963877699
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Laboratorio de Luz
http://www.laboluz.org