Method of processing image information and method of preventing forgery of certificates or the like
First Claim
Patent Images
1. An image processing method comprising:
- converting predetermined additional information into a visible additional image to be embedded in a main image;
creating a composite image by modulating the additional image by using a predetermined mask pattern information and embedding the additional image in the main image in a state of invisibility;
recording the composite image on a recording medium; and
extracting the embedded additional image from the composite image recorded on the recording medium to recover the predetermined information.
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Abstract
Additional information, composed of characters, images, voice, etc., is converted into two-dimensional codes and then converted into a visible additional image to be embedded. The additional image is embedded in a full-color main image in a state of invisibility to produce a composite image. The composite image is recorded on a non-electronic medium such as paper or on an electronic medium, such as a memory on a personal computer, over the Internet. The embedded additional image is extracted from the composite image recorded on the recording medium and the additional information is reproduced.
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Citations
22 Claims
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1. An image processing method comprising:
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converting predetermined additional information into a visible additional image to be embedded in a main image;
creating a composite image by modulating the additional image by using a predetermined mask pattern information and embedding the additional image in the main image in a state of invisibility;
recording the composite image on a recording medium; and
extracting the embedded additional image from the composite image recorded on the recording medium to recover the predetermined information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An image processing method comprising:
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converting predetermined additional information into a visible additional image to be embedded in a main image;
creating a composite image by modulating the additional image by using predetermined mask pattern information and embedding the additional image in the main image in a state of invisibility, the composite image is produced in such a way that it looks a black and white image to the human visual system and its respective pixel is composed of multiple color components; and
recording the composite image on a recording medium. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification