摘要:
In embedding a dot pattern in an image, use of a dot pattern component that mainly aims at suppressing any degradation in image quality sacrifices accurate information detection. Conversely, use of a component that aims at improving the detection accuracy largely degrades the image quality. Error diffusion is executed for an image, a component of a dot pattern to be embedded is determined on the basis of the image that has undergone error diffusion, and the dot pattern is embedded in the image that has undergone error diffusion using the determined component.
摘要:
An image processing system and method for copying an original document while maintaining the security of the document and for providing a high quality copy each time a copy is required. The system and method include inputting image information, generating output limitation information corresponding to the inputted image information, storing the inputted image information and the corresponding output limitation information, reading a document containing specifying information for specifying the stored image information, outputting the stored specified image information in accordance with reading of the specifying information, determining whether the image information specified by reading the specifying information is to be output based on the output limitation information corresponding to the image information, controlling the outputting of the image information in accordance with the determination, and varying the output limitation information corresponding to the image information in accordance with outputting of the image information.
摘要:
A carrier is watermarked and then an image is printed or displayed on this carrier. A watermark can then be read from the image. If the image is printed on the carrier, the watermark can be read from the printed image or from any copy of the printed image. If the watermark is displayed on the carrier, and the displayed image is then copied, the copies will bear the watermark.
摘要:
A security paper for producing security documents, such as bank notes, identity cards or the like, having at least one opening, whereby the opening is produced during papermaking and does not have a sharp limiting edge in the edge area.
摘要:
A negotiable document having enhanced security for deterring fraud includes at least one thermochromatic fingerprint image printed with thermochromatic ink, wherein said thermochromatic fingerprint image will fade when heat is transferred to the image from a live human hand. The negotiable document further includes a warning clause that the negotiable document may be fraudulent without the thermochromatic fingerprint image.
摘要:
Imaged microcapsule-coated paper, e.g. pressure-sensitive copying paper, is produced by imaging paper by means of laser energy and then applying a coating of microcapsules over the image. The image may be a manufacturer's name, logo or trademark, and may be applied at high speed on the paper machine on which the paper is produced or on the coating machine used to apply the microcapsule coating.
摘要:
Compositions and method for producing chemical watermarks in finished paper products, the watermarks being produced by applying to the surface of the paper a synthetic resin composition having a chemical grouping therein capable of being insolubilized upon exposure to high frequency radiation, and thereafter exposing the resin composition to such high frequency radiation to insolubilize the resin.