A solid-state imaging apparatus including a solid-state imaging device having a pixel section having unit pixels for generating imaging signal associated with an object each formed of a first pixel and a second pixel adjacent to the first pixel, a read drive section where one or more pixels of the first and second pixels are respectively treated as a read unit group so as to effect read operation by the read unit group based on a setting signal inputted from an external source, and an output section for generating a difference signal between signals outputted from the first and second pixels to output it as an imaging signal associated with the unit pixel; and a section for interpolating an imaging signal at a predetermined location between the unit pixels based on imaging signals outputted from the difference signal output section.