1. A method of automatically determining a need to service a digital image acquisition system including a digital camera with a lens assembly, comprising: (a) analyzing pixels within one ore more acquired digital images according to probability determinations that such pixels correspond to blemish artifacts; (b) determining whether a threshold distribution of blemish artifacts is present within one or more of said digital images; and (c) indicating a need for service when at least said threshold distribution is determined to be present.