To get the values, just use cvGet2D and s. Val0, s. Val1, s.
Val2 will give you the required intensities if it is a RGB image or just s. Val0 will suffice for greyscale.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.