So, a while back I created this icon from a game, but looking back on it behind a white background instead of an alpha-channel its edges are super choppy in some places while it's smooth in others, which is possibly due to the method I used to select certain regions before bucket-filling it. I was using GIMP and I was wondering if there is any possible way to easily fix this (ie make all edges even instead of choppy). Maybe some rendering filters or selection methods that I don't know about? I've googled and youtubed but with no avail.
(As you can see, the inner crescent-shaped things are choppy as well as the exterior of the circle on the left and right is choppy)