So I'm doing this course about image processing, which algorithm heavy course. Now there's a thing called Fourier transform.
Here's few formulas that is used to explain the basics:
$$C=R+jI$$ $$C^*=R-jI$$ $$C=|C|(\cos(\Theta)+j \sin(\Theta))$$
However, I don't have the slightest of ideas what they mean, what are these variables coming from and what's that round symbol with a dash inside it.