Image processing, reading or forming apparatus and method for adding specific image data to obtained image data while encrypting details data specifying specific data and adding encrypted details data to obtained image data, and non-transitory recording medium recording program for causing computer to function as the same

摘要

A gradation pattern on the basis of the second data for the security of predetermined image data and the details data showing the detail information of a specific image of the image data is provided to a two-dimensional code on the basis of the first data for the security of the image data so that the data for the security of the image data is efficiently added to the image data in a limited space.