Ask HN: What's the best/fastest image processing library?

No APIs, just libraries, what is the fastest image processing library you've worked with that is also feature rich?

I've looked at sharp in node js and it's wonderfully fast however it doesn't seem to allow you to perform some operations such as adjusting the brightness of an image or contrast things that jimp does but much faster than it.

Also looking for something that can handle red eye removal in nodejs.