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US 7,583,813 B2Granted
Embedding data reproduce apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorNaofumi Yamamoto
Life of this patent
Estimating the term…
Abstract
An image having embedded data embedded therein is read to output an image signal, spectral analysis is executed for the image signal, and the embedded data embedded in the image signal is extracted based on a result of the spectral analysis and preset data.
Claims20
An embedded data reproduction apparatus comprising:
- an image input section which reads an image having embedded data embedded therein, and outputs an image signal of the image;
- a spectral analysis section which executes spectral analysis for the image signal output from the image input section;
- a data extraction section which extracts the embedded data embedded in the image signal based on a result of the spectral analysis by the spectral analysis section and preset data;
- an image separation section which extracts a halftone area from the image signal output from the image input section;
- and
- a mask section which masks the halftone area extracted from the image signal output from the image input section by the image separation section, and sends the image signal of an unmasked area to the spectral analysis section.
3 more elements
A falsification detector comprising:
- an image input section which reads an image having embedded data embedded therein, and outputs an image signal of the image;
- a spectral analysis section which executes spectral analysis for the image signal output from the image input section;
- a data extraction section which extracts the embedded data embedded in the image signal based on a result of the spectral analysis by the spectral analysis section and preset data;
- a character code conversion section which extracts a character area from the image signal output from the image input section, and converts the character area into a character code;
- and
- a determination section which determines falsification of the image based on the embedded data extracted by the data extraction section and the character code obtained by the character code conversion section.
3 more elements
Dependencies are inferred from the claim text.