Now since the amazon has enabled CORS I was wondering if this is possible.
CORS
Can the html canvas data (on client browser) be converted to a <
canvas
I was researching this and not having much luck until I found this post: https://github.com/aws/aws-sdk-js/issues/1712#issuecomment-329542614
AWS has a utility that will decode base64 in their aws-sdk: AWS.util.base64.decode(image)
Simple solution, and worked for me.