Image processing device and image processing method

An image processing device for extracting information from an image in which the image processing device embedded information by using one or more information embedding methods, said device comprising:

• an identification information extracting unit configured to extract identification information for identifying the one or more information embedding methods used for embedding the information in the image;
• and
• an information extracting unit configured to extract the information embedded in the image by using the one or more methods identified by the identification information;
• wherein
• the identification information is embedded in a method allowing an amount of the embedded information to be less than an amount of the embedded information in each of the one or more methods.

An image processing method for an image processing device to embed information in an image, the image processing method comprising:

• an information embedding step of embedding target information in the image by using one or more methods selected from a plurality of information embedding methods;
• and
• an identification information embedding step of embedding identification information in the image for identifying the selected one or more methods,
• wherein
• in the identification information embedding step, the identification information is embedded in a method allowing an amount of embedded information to be less than an amount of embedded information in each of the selected one or more methods.