| 摘要 |
PROBLEM TO BE SOLVED: To provide a two-dimensional code image generation method and a two-dimensional code image allowing two-dimensional code data to be buried in a normal design image without the feeling of discomfort.SOLUTION: Each black-and-white module 11 forming a QR code (registered trademark) 10 is reduced, a margin area 16 in which reduction modules 15 are not displayed is formed around each reduction module 15, and the QR code 10 is formed by the reduction modules 15. Superimposed normal images are defined as an aggregate of fine point areas 18, a white or black fixed luminance value is given for each point area 18 of the images, error diffusion processing is performed for each point area 18, and the fixed luminance value of the point area 18 is determined. The normal image formed by the aggregate of the point areas 18 set to the fixed luminance value is superimposed on the margin area 16 of a display area by the reduction modules 15. In an arrangement position of the reduction modules 15, the fixed luminance value of the point areas 18 at the position is defined as a fixed luminance value of the reduction modules 15, and a difference in the luminance value with the normal image at the position is error-diffusion processed and is defined as a fixed luminance value of the surrounding point areas 18.SELECTED DRAWING: Figure 2 |
