NodeJS with portable imagemagick

I am creating a [NodeJS] ↔ [AngularJS + more] application that uses NodeWebkit ( https://github.com/rogerwang/node-webkit ) to build desktop applications (linux, windows, osx). In the final version, I would like to include the server in the desktop version in order to create a standalone application. The problem is that I will need to install Imagemagick on the destination machine as this is a requirement for image processing (never mind, I only resize the images and convert them to png).

Question: is there any portable version for any OS that I can use for this purpose? Or is there any nodejs module for simple image processing that installs itself (using npm only) and doesn't require any other program to install?

Thanks in advance. Let me know if there are any details that he is not very clear about.