Virtual Screen for AWS EC2

Hello, My company developed a python script which, when run on local machine, may take certain screen shot depending on the operating condition. Now, we want to migrat it onto AWS EC2 instance ( and launch it via task scheduler ) . Because there is NO physical display or monitor associate with the instance (when launch the program while the instance is disconnected from the local machine ) , the program failed for not finding a monitor.

Is there a solution for this situation ? May be there is some way to REDIRECT the displayed information onto certain memory space and "taking a screenshot" simply means "to copy that memory"? In other word, is there such a "Vritual DISPLAY" or "Virtual Monitor" mechanism exist ?

Thanks for replying in advance.

Larry Chen