Image processing apparatus, image processing method and recording medium

An image processing apparatus comprising:

• a key information memory that records in itself a plurality of different first key information pieces and a plurality of second key information pieces related to the first key information pieces from one pair to another;
• an operation portion;
• and
• a printer that prints on one side of one sheet or more than one respective sheets, image data and one of the first key information pieces recorded in the memory, and prints on the other side thereof or on another sheet, one of the second key information pieces, which is related to the first key information piece.

An image processing method comprising:

• reading an image on a document;
• outputting image data read out from the document;
• detecting a first key information piece embedded on one side of one sheet or more than one respective sheets that is the document and a second key information piece to be compared to the first key information piece, which is embedded on the other side thereof or on another sheet of the document;
• comparing to each other, the detected first key information piece and second key information piece, and judging whether or not the first key information piece and the second key information piece are related to each other;
• and
• permitting output of image data read out from all relativity judgment target sheets of the document, if it is judged about all these respective sheets that the first key information piece and the second key information piece are related to each other, meanwhile prohibiting output of at least one sheet of the document, if it is judged about this sheet that the first key information piece and the second key information piece are not related to each other.

A computer readable recording medium having an image processing program recorded therein to make a computer of an image processing apparatus execute:

• reading an image on a document;
• outputting image data read out from the document;
• detecting a first key information piece embedded on one side of one sheet or more than one respective sheets that is the document and a second key information piece to be compared to the first key information piece, which is embedded on the other side thereof or on another sheet of the document;
• comparing to each other, the detected first key information piece and second key information piece, and judging whether or not the first key information piece and the second key information piece are related to each other;
• and
• permitting output of image data read out from all relativity judgment target sheets of the document, if it is judged about all these respective sheets that the first key information piece and the second key information piece are related to each other, meanwhile prohibiting output of at least one sheet of the document, if it is judged about this sheet that the first key information piece and the second key information piece are not related to each other.