Information embedding method, its program and information embedding device

An information embedding method for embedding information represented by positions in which dots are to be embedded, the information embedding method comprising the steps of:

• embedding first information according to a first information expression rule;
• and
• embedding second information according to a second information expression rule different from the first information expression rule such that at least a part of the first information and a part of the second information exist in the same region
• wherein the second information includes information for indicating prohibition or permission of a predetermined operation, and the first information includes information having an influence on the second information, and
• wherein the first information further includes information for canceling the prohibition of the predetermined operation.

A non-transitory computer readable storage medium storing a program for making a computer execute an information embedding method for embedding information represented by positions in which dots are to be embedded, the information embedding method comprising the steps of:

• embedding first information according to a first information expression rule;
• and
• embedding second information according to a second information expression rule different from the first information expression rule such that at least a part of the first information and a part of the second information exist in the same region
• wherein the second information includes information for indicating prohibition or permission of a predetermined operation, and the first information includes information having an influence on the second information, and
• wherein the first information further includes information for canceling the prohibition of the predetermined operation.

An information embedding apparatus, comprising:

• a controller configured to embed information by using an information embedding method for embedding information represented by positions of dots which are to be superimposed on a document image and be printed on a sheet together with the document image, the information embedding method including the steps of:
• embedding, in the document image according to a first information expression rule, a first embed-image including first dots so that positions of the first dots on the sheet represent first information when the first embed-image and the document image are printed on the sheet;
• and
• embedding, in the document image according to a second information expression rule different from the first information expression rule, a second embed-image including second dots so that positions of the second dots on the sheet represent second information when the second embed-image and the document image are printed on the sheet, such that at least a part of the first embed-image and a part of the second embed-image exist in the same region.

An information embedding method comprising:

• causing an information embedding apparatus to embed information, the information embedding apparatus including a controller configured to embed information by using an information processing method for embedding information represented by positions of dots which are to be superimposed on a document image and be printed on a sheet together with the document image, the information processing method including the steps of
• embedding, in the document image according to a first information expression rule, a first embed-image including first dots so that positions of the first dots on the sheet represent first information when the first embed-image and the document image are printed on the sheet;
• and
• embedding, in the document image according to a second information expression rule different from the first information expression rule, a second embed-image including second dots so that positions of the second dots on the sheet represent second information when the second embed-image and the document image are printed on the sheet, such that at least a part of the first embed-image and a part of the second embed-image exist in the same region.