The preprogrammable memory may be programmed for each time of image storage, or may be programmed only for the times of storage in the first image memory and a time delay factor for storage in the second image memory relative to the times of {HEAD ~ storage} in {TAIL ~ the first image memory} 
The preprogrammable memory may be programmed for each time of image storage , or may be programmed only for the times of storage in the first image memory and a time delay factor for storage in the second image memory relative to the times of { HEAD ~ storage } in { TAIL ~ the first image memory }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL