Hi Minhas,
on a more general note: You can always get a template for how to invoke an algorithm in Python from the Workspace Editor (found in the “View” menu).
When you execute an algorithm in the Suite an entry for it with the matching configuration will be created in the Workspace Editor’s list of algorithms (left side of the window).
Regarding your question about points. Could you please elaborate what you are trying to do and what API you are using? In most cases Annotations like points are located in world space.
Cheers,
Ilja