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.