Patent ID: 8451264

Claim:
A method executed by a computer for displaying an image including a plurality of blocks in which code information can be embedded, comprising: obtaining a first image including a plurality of blocks; generating a second image using a characteristic value of selected blocks of the first image and adding the code information to be embedded; obtaining size information indicating a physical size of the first image and the second image when determining one of the first image and the second image is displayed on a display; determining a first of a time period of displaying the first image and a second of the time period of displaying the second image by shortening the second time period in correspondence with an increase of the physical size of the first image; and displaying the first image until the first time period passes, and switching to displaying the second image until the second time period passes, by adjusting the first time period and the second time period within the time period relative to the physical size of the first image, by the computer.