command line function addition: Save Image

I would like to request that a fully Save Image capability be added to the command line capability. I would like to be able to fully configure in a commandline commands to save an active window or workspace. I would like to be able to be able to trigger this function without requiring any confirmation windows or manual intervention. I would simply like to be able to enter into the command line a command and have a capture of a current window or workspace be saved under a entered path and file name as it would be by using the File menu command but without any dialogs.