The 'image name' is the name of the executable file used when the process was created; this name is popularly referred to as the name of the process, though it's not really. (Why 'image'? Because programmers used the word 'image' for 'memory image file' long before it was possible to put pictures on a computer without a defense-department-sized budget).
Originally posted by: Bassyhead
i've always wondered about this as well