The focusing information visualization system of the invention extracts an edge having an edge intensity of not less than a first reference value Th1 and an edge width of not greater than {HEAD ~ a second reference value Th2} in a photographic image and displays the extracted edge in a preset color at a position of the edge extraction to be overlapped with {TAIL ~ the original photographic image} on a screen 
The focusing information visualization system of the invention extracts an edge having an edge intensity of not less than a first reference value Th1 and an edge width of not greater than { HEAD ~ a second reference value Th2 } in a photographic image and displays the extracted edge in a preset color at a position of the edge extraction to be overlapped with { TAIL ~ the original photographic image } on a screen
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 HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH