Image processing apparatus and method using image information and additional information or an additional pattern added thereto or superposed thereon

• US 7,061,652 B2
• Filed: 11/27/2001
• Issued: 06/13/2006
• Est. Priority Date: 09/28/1992
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Funada, Masahiro, Takaragi, Yoichi, Suzuki, Yasumichi, Ishimoto, Koichi, Kanno, Akiko, Kurita, Mitsuru, Maeshima, Katsuyoshi
• Primary Examiner(s): Lee, Thomas D.
• Assistant Examiner(s): BRINICH, STEPHEN M
• Application Number:
  US09/993,725
• Publication Number:
  US 20020054356A1
• Time in Patent Office: 1,659 Days
• Field of Search: 358/3.28, 358/1.9, 358/2.1, 358/3.24, 382/237
• US Class Current: 358/3.28
• CPC Class Codes: H04N 1/00843 based on recognising a copy prohibited original, e.g. a banknote pattern authentication and markers therefor, forgery detection G06V20/95; character recognition G06V30/10; document-oriented image-based pattern recognition G06V30/40; testing paper currency or similar valuable papers for genuineness G07D7/00
• CPC Class Codes: H04N 1/00848 by detecting a particular original
• 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 1/32144 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 2201/3205 of identification information, e.g. name or ID code H04N2201/3209 takes precedence
• CPC Class Codes: H04N 2201/327 which are undetectable to the naked eye, e.g. embedded codes
• CPC Class Codes: H04N 2201/3271 Printing or stamping

Abstract

Predetermined additional information is superposed as a dot pattern on image information read by an image scanner, and the image information superposed with the additional information is modulated. The modulated information is demodulated and recorded on a recording medium to perform a series of operations, i.e., to simultaneously satisfy both pattern addition and modulation/demodulation.

Claims

1. An image processing apparatus having image forming means for forming an image on a medium, comprising:

processing means for performing a predetermined process on input image information; and

means for superposing predetermined additional information on the image information processing by said processing means,

wherein when the image forming means forms an image in accordance with the image information on which the additional information is superposed by said superposing means, said superposing means superposes the additional information so as to make it difficult for the human eye to identify the additional information, and

wherein the additional information is represented by a relative positional relationship between a dot position of a line formed by equidistantly arranging dots in a first direction and a dot position of an adjacent line formed by equidistantly arranging dots in a second direction perpendicular to the first direction.

2. The apparatus according to claim 1 wherein the additional information comprises a predetermined pattern having a mark representing a position where the additional information is added to the image information.

3. The apparatus according to claim 1 wherein the additional information is at least one of apparatus identification information and apparatus operator identification information.

4. The apparatus according to claim 2 wherein at least one of the dots is obtained by modulating image information constituted by one pixel or a plurality of adjacent pixels.

5. The apparatus according to claim 1 wherein the additional information is represented by a plurality of ones of the line, which are repeated in the second direction.

6. The apparatus according to claim 5 wherein when the plurality of lines correspond to predetermined identification information, another dot different from an original dot is added to a specific line of the plurality of lines, thereby forming a division in the predetermined identification information.

7. The apparatus according to claim 6 wherein the specific line comprises two specific lines of the plurality of lines corresponding to the predetermined identification information, thereby determining the division in the identification information and an arrangement direction of the identification information.

8. The apparatus according to claim 1 wherein the additional information is superposed for a color most unnoticeable to a human eye in colors representing an image.

9. The apparatus according to claim 1 wherein the predetermined process is at least one of magnification, color conversion, MTF correction, and modulation.

10. An image processing method applied to an image processing apparatus having image forming means for forming an image on a medium, comprising:

a processing step of performing a predetermined process on input image information; and

a superposing step of superposing predetermined additional information on the image information processing at said processing step,

wherein when said the image forming means forms an image in accordance with the image information on which the additional information is superposed at said superposing step, said superposing step superposes the additional information so as to make it difficult for the human eye to identify the additional information, and

the additional information is represented by a relative positional relationship between a dot position of a line formed by equidistantly arranging dots in a first direction and a dot position of an adjacent line formed by equidistantly arranging dots in a second direction perpendicular to the first direction.