Ask HN: Image processing as a service (IpAAS?)

With all the client-side infrastructure as a services that are popping out lately, I think it is an exciting time to be able to put up a quick prototype and host the entire thing in a CDN.

But some things still require non-JS, backend infrastructure to run. Image processing for one. Do you peeps know of any service out there that does image processing as a service and also happen to provide a javascript sdk or REST api?

Thanks in advance!