Patent ID: 8967470
Filing Date: 2015-03-03
Classification: G06K,G06Q

Abstract:
1. An information exchanging method for exchanging information by the use of a two-dimensional code and a two-dimensional code reader, said information exchanging method comprising: an original sheet preparing step of writing a first two-dimensional code and a second two-dimensional code both configured in color on a sheet to prepare an original sheet, said first two-dimensional code being composed of a portion having a first color and a portion having a second color, said first color being the same as the color of light to be emitted from said two-dimensional code reader, said second color being a complementary color to said first color and having the same lightness as that of said first color, said second two-dimensional code being composed of a portion having a fourth color and a portion having a third color, said fourth color being the same as the color of light to be emitted from said two-dimensional code reader, said third color being the same as said fourth color and having a lightness different from that of said fourth color, said first two-dimensional code being readable by said two-dimensional code reader, said second two-dimensional code being unreadable by said two-dimensional code reader; a monochrome copy sheet preparing step of monochromatically copying said original sheet to prepare a monochrome copy sheet, said monochrome copy sheet including a third two-dimensional code as a monochrome copy of said first two-dimensional code and a fourth two-dimensional code as a monochrome copy of said second two-dimensional code, said third two-dimensional code being unreadable by said two-dimensional code reader, said fourth two-dimensional code being readable by said two-dimensional code reader; and an information exchanging step of exchanging the information by using said original sheet and said monochrome copy sheet.