Add an edge detection function to the suite of ImageEffects

[andrewyancey]

Edge detection works by detecting an abrupt change in pixel colors. This would be a nice addition to the suite of image effects

[oneofmanylukes]

We could implement it as stated in this this reddit comment, then we could use the implementation in many different ways.

[genious97]

Kappa this was exactly what I mentioned in the discord

[andrewyancey]

Yes. It’s just a matter of when someone gets around to implement it.