1. A method for processing images comprising the following steps: A. generating a dynamic representation of a region as a series of image data frames; B. continuously storing the series of image data frames in a memory and overwriting in the memory only unprotected stored frames when the memory is filled; C. preselecting a data protection interval; D. indicating at least one trigger event; and E. when each trigger event is indicated, storing the corresponding data frames that fall within the data protection interval as protected frames in protected memory positions, without interruption of the dynamic representation of the region.