| 摘要 |
A data hiding method enables embedded information to be extracted without providing original media data as information and enables the information to be extracted with relatively low calculation cost. The data hiding method embeds information indicating a specific meaning into a media array expressing media data, the media array comprising a plurality of array elements, the method including the steps of:(a) preparing a pattern array having a plurality of array elements, the pattern array having at least a positive unit value and a negative unit value, and the sum total of the positive and negative unit values being zero;(b) specifying (N) number of hiding regions in the media array, the hiding region having a size corresponding to that of the pattern array;(c) determining an amount of operation for each of the array elements according to the locationally corresponding positive or negative unit value with respect to one of the hiding regions, by referring to a hiding rule providing the correspondence between the meaning of information and an application of the pattern array to the hiding region;(d) adding the determined amount of operation to each of the array elements with respect to the hiding region; and(e) performing the steps (c) to (d) with respect to the (N) number of the hiding regions so that information is embedded into (N) number of the hiding regions.
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