I don't understand what you trying to show. I see a floating image window that was zoomed to 50% size most likes so the full image would fit on screen however it looks like that floating window was re-sized so it now has scroll bars. And I see a canvas size dialog the is showing the current canvas size.
It is possible to add a open event to the script event manager that will change the image view to be actual pixel zoom to 100% there will most likely be scroll bars on large camera images.