Image Processing , what should I know? and C++ general question

[opointer]

Hi,
I am Msc student in the Image processing field and I mainly use Matlab.
I see that most of the companies that use image processing use C++ and not Matlab.
In that matter I have few questions, I will be glad of any help

1) What subject, and material I need to cover in C++ in order to achieve good knowledge in C++ with connotation to image processing ?

2) I went over all the tutorial here in the site (great one.)
what should be my next step?

Thanks
o