Patent ID: 8611663

Claim:
A non-transitory computer readable medium having stored thereon an information image which has a rectangle shape, the information image comprising: a first pixel series that represents first information as a succession of binary numbers 0 or 1 and that is a series of pixel lumps arranged continuously as a row in the rectangle; a second pixel series that represents second information as a succession of binary numbers 0 or 1 and that is a series of pixel lumps arranged continuously as a column in the rectangle; a third pixel series that represents third information and that is a series of pixel lumps arranged continuously as a row which is located at a predetermined position with respect to the row of the first pixel series in the rectangle; a fourth pixel series that represents fourth information and that is a series of pixel lumps arranged continuously as a column which is located at a predetermined position with respect to the column of the second pixel series in the rectangle; and a fifth pixel series that represents fifth information buried in the information image and that is a series of pixel lumps arranged in an area other than the rows and the columns of the first pixel series, the second pixel series, the third pixel series, and the fourth pixel series in the rectangle, wherein the third information and the fourth information are determined from a plurality of third information candidate signal series and a plurality of fourth information candidate signal series, based on a determination, for each third information candidate signal series of the plurality of third information candidate signal series and each fourth information candidate signal series of the plurality of fourth information candidate signal series, (i) a distance between the third information candidate signal series and the fourth information candidate signal series in an information space, (ii) a distance between the third information candidate signal series and reversed information of the third information candidate signal series in the information space, (iii) a distance between the third information candidate signal series and reversed information of the fourth information candidate signal series in the information space, (iv) a distance between the third information candidate signal series and information which is a succession of binary numbers 0 or 1 in the information space, (v) a distance between the fourth information candidate signal series and reversed information of the fourth information candidate signal series in the information space, (vi) a distance between the fourth information candidate signal series and reversed information of the third information candidate signal series in the information space, and (vii) a distance between the fourth information candidate signal series and information which is a succession of binary numbers 0 or 1 in the information space.