Information Processing Method and Device, Computer Program, and Computer-Readable Storage Medium
AssigneeCanon Kabushiki Kaisha
InventorJunichi Hayashi
Life of this patent
Estimating the term…
Abstract
A partial data acquisition unit acquires partial data included in digital data, a partial data specifying information acquisition unit acquires specifying information for the partial data, a combining unit combines the partial data and the specifying information, and a verification data generation unit generates verification data. Thus, it is possible to verify whether or not region data in image data has been altered. In addition, it is possible to verify that the region data is the region data in image data different from the original image data, and/or, it is possible to further verify that the region data is the different region data included in the original image data.
Claims16
An information processing method which generates verification data for verifying partial completeness of digital data, comprising:
- a partial data acquisition step of acquiring partial data included in the digital data;
- a discrimination information acquisition step of acquiring at least one of discrimination information of the digital data and specifying information of the partial data;
- and
- a verification data generation step of generating the verification data according to at least one of the discrimination information of the digital data and the specifying information of the partial data, and the partial data.
An information processing method which verifies partial completeness of digital data by using first verification data generated according to at least one of discrimination information of the digital data and specifying information of partial data, and the partial data, said method comprising:
- a verification data acquisition step of acquiring the first verification data;
- a partial data acquisition step of acquiring the partial data included in the digital data;
- a discrimination information acquisition step of acquiring at least one of the discrimination information of the digital data and the specifying information of the partial data;
- a verification data generation step of generating second verification data according to at least one of the discrimination information of the digital data and the specifying information of the partial data, and the partial data;
- and
- a verification step of verifying whether or not relation between the partial data and the digital data is correct, by using the first verification data acquired in said verification data acquisition step and the second verification data generated in said verification data generation step.
An information processing device which generates verification data for verifying partial completeness of digital data, comprising:
- a partial data acquisition unit adapted to acquire partial data included in the digital data;
- a discrimination information acquisition unit adapted to acquire at least one of discrimination information of the digital data and specifying information of the partial data;
- and
- a verification data generation unit adapted to generate the verification data according to at least one of the discrimination information of the digital data and the specifying information of the partial data, and the partial data.
An information processing device which verifies partial completeness of digital data by using first verification data generated according to at least one of discrimination information of the digital data and specifying information of partial data, and the partial data, said device comprising:
- a verification data acquisition unit adapted to acquire the first verification data;
- a partial data acquisition unit adapted to acquire the partial data included in the digital data;
- a discrimination information acquisition unit adapted to acquire at least one of the discrimination information of the digital data and the specifying information of the partial data;
- a verification data generation unit adapted to generate second verification data according to at least one of the discrimination information of the digital data and the specifying information of the partial data, and the partial data;
- and
- a verification unit adapted to verify whether or not relation between the partial data and the digital data is correct, by using the
- first verification data acquired by said verification data acquisition unit and the second verification data generated by said verification data generation unit.
A computer program which is used to execute an information processing method of generating verification data for verifying partial completeness of digital data, said method comprising:
- a partial data acquisition step of acquiring partial data included in the digital data;
- a discrimination information acquisition step of acquiring at least one of discrimination information of the digital data and specifying information of the partial data;
- and
- a verification data generation step of generating the verification data according to at least one of the discrimination information of the digital data and the specifying information of the partial data, and the partial data.
A computer-readable storage medium which stores a computer program for executing an information processing method of generating verification data for verifying partial completeness of digital data, said method comprising:
- a partial data acquisition step of acquiring partial data included in the digital data;
- a discrimination information acquisition step of acquiring at least one of discrimination information of the digital data and specifying information of the partial data;
- and
- a verification data generation step of generating the verification data according to at least one of the discrimination information of the digital data and the specifying information of the partial data, and the partial data.
A computer program which is used to execute an information processing method of verifying partial completeness of digital data by using first verification data generated according to at least one of discrimination information of the digital data and specifying information of partial data, and the partial data, said method comprising:
- a verification data acquisition step of acquiring the first verification data;
- a partial data acquisition step of acquiring the partial data included in the digital data;
- a discrimination information acquisition step of acquiring at least one of the discrimination information of the digital data and the specifying information of the partial data;
- a verification data generation step of generating second verification data according to at least one of the discrimination information of the digital data and the specifying information of the partial data, and the partial data;
- and
- a verification step of verifying whether or not relation between the partial data and the digital data is correct, by using the first verification data acquired in said verification data acquisition step and the second verification data generated in said verification data generation step.
A computer-readable storage medium which stores a computer program for executing an information processing method of verifying partial completeness of digital data by using first verification data generated according to at least one of discrimination information of the digital data and specifying information of partial data, and the partial data, said method comprising:
- a verification data acquisition step of acquiring the first verification data;
- a partial data acquisition step of acquiring the partial data included in the digital data;
- a discrimination information acquisition step of acquiring at least one of the discrimination information of the digital data and the specifying information of the partial data;
- a verification data generation step of generating secondverification data according to at least one of the discrimination information of the digital data and the specifying information of the partial data, and the partial data;
- and
- a verification step of verifying whether or not relation between the partial data and the digital data is correct, by using the first verification data acquired in said verification data acquisition step and the second verification data generated in said verification.
Dependencies are inferred from the claim text.