1. A system for calibrating multi-camera array images, comprising: a. an array of at least four acquisition devices, configured to acquire images; b. at least one reference acquisition device configured to acquire at least one reference image at least partially overlapping at least four of said images; c. a processor configured to extract tie points between said at least four of said images and said at least one reference image and utilize said tie points for calibrating said at least four of said images in respect of said at least one reference image.