Is there a way to get Image data when Image is not from the same domain?

Question

I heard there is a setting that I can change to allow images from remote domains to work? Or is it that I am supposed to call Security.allowDomain() method at some point? I would rather just change a setting on the Image component instance if available?

From the documentation:

SecurityError The target object and all of its child objects do not come from the same domain as the caller, or are not in a content that is accessible to the caller by having called the Security.allowDomain() method.

More info:
IIRC there was a property on the mx:Image component? I'm using Spark Image component in my project but knowing what that is may help me figure out a solution for the Spark Image.