Low memory node image resizing/S3 option

Looking for some ideas on this. I currently use Imager - perfect functionality except that I get memory issues on larger images - I use NodeJitsu and have very little memory to play with. I am looking for another solution that will not load the entire image in memory - need to do multiple size and upload to S3 (cloudfiles would work to). I found this

• https://npmjs.org/package/image-resize-s3 - deprecated/no gif support
• https://github.com/funraiseme/simgr - no docs, not even sure how that works with S3

Ideas?