Godai wrote:
> I have to write a C algorithm to calculate Image Correlation between two
> complex images. Can you give me some advice to begin?
You apparently need two things: an algorithm and a C implementation of
that algorithm.
For the algorithm, try comp.graphics.algorithms or perhaps
comp.programming. If you run into problems implementing the algorithm
in C, you can post here.

Keith Thompson (The_Other_Keith) <(EMail Removed)>
Looking for software development work in the San Diego area.
"We must do something. This is something. Therefore, we must do this."
 Antony Jay and Jonathan Lynn, "Yes Minister"
