[bemmu]

I think this post is turning out to be quite a nice piece of marketing for Imgix. After reading about it I signed up immediately and already entered my CC details.

For me the killer feature is being able to crop images such that a detected face within the image is centered.

[jaymzcampbell]

I've been using Thumbor[1] on an EC2 instance and once OpenCV is installed the face & feature detection has been great. Combined with a similar style of "put the transforms in the URL" on demand method of serving images it's been awesome.

[1]: http://thumbor.org/