Image coding device, image coding method, and image falsification identification program
AssigneeJVC KENWOOD Corporation
InventorsTakayuki SUGAHARA, Masaki GOTO
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Abstract
An image coding device adapted to code time-continuous pictures is provided. An embedding position information conversion unit acquires embedding position information indicating a position in a picture, by using a one-way function based on time-continuous information. An image coding unit selects a coding block in the picture based on the embedding position information, embeds electronic watermark information in a coding parameter used to code the coding block, and codes the coding block by using the coding parameter in which the electronic watermark information is embedded.
Claims6
An image coding device adapted to code time-continuous pictures, comprising:
- an embedding position information conversion unit that acquires embedding position information indicating a position in a picture, by using a one-way function based on time-continuous information;
- and
- an image coding unit that selects a coding block in the picture based on the embedding position information, embeds electronic watermark information in a coding parameter used to code the coding block, and codes the coding block by using the coding parameter in which the electronic watermark information is embedded.
An image coding method adapted to code time-continuous pictures, comprising:
- acquiring an embedding position information conversion unit indicating a position in a picture, by using a one-way function based on time-continuous information;
- selecting a coding block in the picture based on the embedding position information, embedding electronic watermark information in a coding parameter used to code the coding block, and coding the coding block by using the coding parameter in which the electronic watermark information is embedded.
A recording medium encoded with an image falsification identification program adapted to decode a picture from a coded bitstream in which time-continuous pictures are coded and detect electronic watermark information, and to identify whether falsification has been made, the image falsification identification program comprising computer-implemented modules including:
- an embedding position information conversion module that acquires embedding position information indicating a position in a picture, by using a one-way function based on time-continuous information acquired from the picture;
- an electronic watermark information extraction module that selects a coding block in the picture based on the embedding position information and extracts the electronic watermark information from a coding parameter used to code the coding block;
- and
- a comparison and determination module that determines whether the picture has been falsified by comparing the extracted electronic watermark information with reference information.
Dependencies are inferred from the claim text.