The present invention relates to a composition for gelatin coating and a gelatin coating characterized by containing a gelatin and an inositol phosphate represented by a general formula: C6H12-n. The method comprises displaying a user selection menu and a command line. The switch has an actuator connected to the line. Preferably, each column has a pair of red lights near the base of the device, an intermediate pair of blue lights disposed upward from the red lights, and then a pair of red lights disposed upward from the blue lights. A primary advantage associated with at least one embodiment of the present invention is that the response to real estate leads is shortened by a very large order of magnitude, as conventional response time may typically be in the range of several hours to several days. Based on the calculated value, brightness of images obtained by the plurality of imaging units is corrected by a brightness correction unit.