Edge Detector

This takes an image and calculates the edges within.

If you've ever needed to take an image and get a black and white return of only the edges then this is the program for you! It originally started as a project to create a function that did this, but I thought it would be neat to make a working program. This is the first project I've ever done like this and I'm pretty happy with how it turned out.
I plan on adding a few different edge detection modes and possibly different image processing functions. Currently it only works for .png images, but I'll expand that in the future. It doesn't use kernels (yet) because I didn't know about them while making it, but I'd like to add them.