Image processor, method thereof, computer program, and computer readable storage medium

• US 7,571,323 B2
• Filed: 01/16/2004
• Issued: 08/04/2009
• Est. Priority Date: 01/22/2003
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kaneda, Kitahiro, Iwamura, Keiichi
• Primary Examiner(s): Zand; Kambiz
• Assistant Examiner(s): Wyszynski; Aubrey H
• Application Number:
  US10/759,364
• Publication Number:
  US 20040148507A1
• Time in Patent Office: 2,027 Days
• Field of Search: 713/176, 382/100
• US Class Current: 713/176
• CPC Class Codes: G06T 1/0021 Image watermarking
• CPC Class Codes: G06T 2201/0051 Embedding of the watermark in the spatial domain
• CPC Class Codes: G06T 2201/0062 Embedding of the watermark in text images, e.g. watermarking text documents using letter skew, letter distance or row distance
• CPC Class Codes: H04N 1/00005 relating to image data
• CPC Class Codes: H04N 1/00037 Detecting, i.e. determining the occurrence of a predetermined state H04N1/00031 takes precedence
• CPC Class Codes: H04N 1/00846 based on detection of a dedicated indication, e.g. marks or the like
• CPC Class Codes: H04N 1/00864 Modifying the reproduction, e.g. outputting a modified copy of a scanned original details of composing or otherwise geometrically modifying originals H04N1/387
• CPC Class Codes: H04N 1/00867 with additional data, e.g. by adding a warning message details of embedding additional information in an image H04N1/32144
• CPC Class Codes: H04N 1/0087 with hidden additional data, e.g. data invisible to the human eye
• CPC Class Codes: H04N 1/00875 Inhibiting reproduction, e.g. by disabling reading or reproduction apparatus
• CPC Class Codes: H04N 1/00883 Auto-copy-preventive originals, i.e. originals that are designed not to allow faithful reproduction
• CPC Class Codes: H04N 1/32144 embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
• CPC Class Codes: H04N 2201/3246 of data relating to permitted access or usage, e.g. level of access or usage parameters for digital rights management [DRM] related to still images
• CPC Class Codes: H04N 2201/327 which are undetectable to the naked eye, e.g. embedded codes

Abstract

A method for image processing comprising inputting and reading a combined image that includes a latent image unperceivable by the human eye, a patterned image in the background allowing the latent image to appear clearly on a recording medium when data recorded on a recording medium is copied onto another recording medium, and text and/or image data embedded with a digital watermark. The text and/or image data is extracted from the combined image and the digital watermark extracted from the text and/or image data. A permission code enabling copying of image data composed of a combination of a patterned image and the extracted text and/or image data onto a recording medium is input. The copying is regulated based on the extracted digital watermark and the permission code.

Claims

1. An image processor comprising:

a scanning unit for reading a recording medium, the recording medium having first patterned image data printed thereon and image data printed thereon, the image data including embedded information, the first patterned image data including a latent image unperceivable by human eyes, the latent image being formed more clearly on a copy-destination recording medium when information recorded on the recording medium is copied by a copying machine;

a separating unit for separating the read image data input by the scanning unit to obtain the image data including the embedded information; and

an outputting unit for controlling output of combined image data produced by combining second patterned image data with the image data including the embedded information, the second patterned image data including a latent image unperceivable by human eyes, the latent image being formed more clearly on the copy-destination recording medium when information recorded on the recording medium is copied by the copying machine.

2. The image processor according to claim 1,

wherein the outputting unit includes an extracting unit for extracting the embedded information from the image data obtained by the separating unit, with the embedded information embedded therein,

wherein the outputting unit outputs the combined image data when the embedded information extracted by the extracting unit includes information indicating permission for copying the whole read image data,

wherein the outputting unit cuts out and outputs a part of the combined image data when the embedded information extracted by the extracting unit includes information indicating permission for copying a part of the read image data, and

wherein the outputting unit does not output the combined image data when the embedded information extracted by the extracting unit includes information indicating prohibition of copying.

3. The image processor according to claim 1, wherein the second patterned image data is patterned image data that is stored in advance or that is newly generated.

4. The image processor according to claim 1,

wherein the separating unit, by separating the read image data, also obtains the first patterned image data including the latent image appearing clearly in addition to the image data including information, and

wherein the outputting unit combines the second patterned image data, instead of the patterned image data with the latent image appearing clearly, with the image data with the embedded information embedded therein, and controls output of the combined image data obtained by the combining operation.

5. An image processing method comprising:

a scanning step of reading a recording medium, the recording medium having first patterned image data printed thereon and image data with embedded information embedded therein, the first patterned image data including a latent image unperceivable by human eyes, the latent image being formed more clearly on a copy-destination recording medium when information recorded on the recording medium is copied by a copying machine;

a separating step of separating the read image data read in the scanning step to obtain the image data with the embedded information embedded therein; and

an outputting step of controlling output of combined image data produced by combining second patterned image data with the image data with the embedded information embedded therein, the second patterned image data including a latent image unperceivable by human eyes, the latent image being formed more clearly on the copy-destination recording medium when information recorded on the recording medium is copied by a copying machine.

6. The image processing method according to claim 5,

wherein the outputting step includes an extracting step of extracting the embedded information from the image data, obtained in the separating step, including the embedded information,

wherein, in the outputting step, the combined image data is output when the embedded information extracted in the extracting step includes information indicating permission for copying the whole read image data,

wherein, in the outputting step, a part of the combined image data is cut out and output when the embedded information extracted in the extracting step includes information indicating permission for copying a part of the read image data, and

wherein, in the outputting step, the combined image data is not output when the embedded information extracted in the extracting step includes information indicating prohibition of copying.

7. The image processing method according to claim 5, wherein the second patterned image data is patterned image data that was stored in advance or that is newly generated.

8. The image processing method according to claim 5,

wherein, by separating the read image data in the separating step, the patterned image data including the latent image appearing clearly is also obtained in addition to the image data including the embedded information, and wherein, in the outputting step, the second patterned image data, instead of the patterned image data including the latent image appearing clearly, is combined with the image data including the embedded information, and an output of the combined image data obtained by the combining operation is controlled.