Image processing apparatus that adds information indicating a copy is of an authentic document
AssigneeCanon Kabushiki Kaisha
InventorsAkitoshi Yamada, Hiroyasu Kunieda, Yoichi Kashibuchi
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Abstract
To make it possible to easily determine a printed material of an electronic document proved to be an authentic original document and a copied material thereof. In a case where a printed material is copied, embedded information is extracted from a scanned image obtained by scanning the target printed material. Then, in a case where it is confirmed that the copy-target printed material is an authentic document, the printed material is printed and output by adding information indicating being a copied material thereto.
Claims13
An image processing apparatus having a copy function, the image processing apparatus comprising:
- a memory that stores a program;
- and
- a processor that executes the program to perform:
- obtaining a scanned image by scanning a copy-target printed material;
- extracting embedded information from the scanned image;
- generating an image to be printed based on the scanned image;
- and
- performing print processing using the image to be printed, wherein the generating comprises:
- determining whether or not a document ID indicated by the extracted embedded information is valid;
- removing the embedded information from the scanned image;
- determining, by comparing pixel values of the scanned image from which the embedded information has been removed and pixel values of an image obtained by performing a rendering process for electronic document data associated with the document ID, whether or not the copy-target printed material has been falsified, wherein the electronic document data is managed along with information indicating that the contents thereof are authentic;
- and
- generating, in a case where it is determined that the document ID is valid and the copy-target printed material has not been falsified, the image to be printed that is the scanned image to which information indicating being a copied material of an authentic document is added.
A control method of an image processing apparatus having a copy function, the control method comprising:
- an obtaining step of obtaining a scanned image by scanning a copy-target printed material;
- an extraction step of extracting embedded information from the scanned image;
- a generation step of generating an image to be printed based on the scanned image;
- and
- a printing step of performing print processing using the image to be printed, wherein the generation step comprises:
- determining whether or not a document ID indicated by the extracted embedded information is valid;
- removing the embedded information from the scanned image;
- determining, by comparing pixel values of the scanned image from which the embedded information has been removed and pixel values of an image obtained by performing a rendering process for electronic document data associated with the document ID, whether or not the copy-target printed material has been falsified, wherein the electronic document data is managed along with information indicating that the contents thereof are authentic;
- and
- generating, in a case where it is determined that the document ID is valid and the copy-target printed material has not been falsified, the image to be printed that is the scanned image to which information indicating being a copied material of an authentic document is added.
A non-transitory computer readable storage medium storing a program for causing a computer to perform a control method of an image processing apparatus having a copy function, the control method comprising:
- an obtaining step of obtaining a scanned image by scanning a copy-target printed material;
- an extraction step of extracting embedded information from the scanned image;
- a generation step of generating an image to be printed based on the scanned image;
- and
- a printing step of performing print processing using the image to be printed, wherein the generation step comprises:
- determining whether or not a document ID indicated by the extracted embedded information is valid;
- removing the embedded information from the scanned image;
- determining, by comparing pixel values of the scanned image from which the embedded information has been removed and pixel values of an image obtained by performing a rendering process for electronic document data associated with the document ID, whether or not the copy-target printed material has been falsified, wherein the electronic document data is managed along with information indicating that the contents thereof are authentic;
- and
- generating, in a case where it is determined that the document ID is valid and the copy-target printed material has not been falsified, the image to be printed that is the scanned image to which information indicating being a copied material of an authentic document is added.
Dependencies are inferred from the claim text.