1. A digital image acquisition system comprising an image capture component for capturing in a buffer, a current digital image having pixels; at least one digital processor programmed for real time computation of multiple quality indicators characterizing quality of the current digital image; automatic image capturing, and storing in user-accessible memory, of at least one image only after a first logical criterion predefined on said multiple quality indicators, is satisfied; and a message provider operative, while said first logical criterion is still not satisfied, to select, based on at least one second logical criterion pre-defined on at least one of said multiple quality indicators, at least one appropriate suggestion from a pre-stored table of suggestions of how a user of the system may cause said first logical criterion to be satisfied and to present said appropriate suggestion to the user, wherein at least one of said logical criteria are pre-defined over a time-dependent confidence level defined over at least one of said quality indicators.