Image reading or processing with ability to prevent copying of certain originals

• US 5,621,810 A
• Filed: 11/16/1994
• Issued: 04/15/1997
• Est. Priority Date: 02/10/1989
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Suzuki, Yoshiyuki, Funada, Masahiro, Kawase, Michio, Outa, Kenichi
• Primary Examiner(s): Boudreau, Leo
• Assistant Examiner(s): Shalwala, Bipin
• Application Number:
  US08/341,937
• Time in Patent Office: 881 Days
• Field of Search: 358/526, 358/538, 358/453, 358/462, 358/464, 382/7, 382/135, 382/17, 382/191, 382/16, 382/198, 382/38, 382/227, 355/201, 380/3, 380/51, 380/54
• US Class Current: 382/135
• CPC Class Codes: G03G 15/507 being interleaved with the original or directly written on he original, e.g. using a control sheet
• CPC Class Codes: G03G 21/046 by discriminating a special original, e.g. a bank note
• CPC Class Codes: G07D 7/0034 using watermarks
• CPC Class Codes: G07D 7/17 Apparatus characterised by positioning means or by means responsive to positioning
• CPC Class Codes: H04N 1/00838 Preventing unauthorised reproduction
• 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 1/00846 based on detection of a dedicated indication, e.g. marks or the like
• CPC Class Codes: H04N 1/00848 by detecting a particular original
• CPC Class Codes: H04N 1/00859 Issuing an alarm 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 1/00872 by image quality reduction, e.g. distortion or blacking out

Abstract

There is disclosed an apparatus for image reading or processing, that can precisely identify a particularly pattern, such as of banknotes or securities faithful copying of which is to be prohibited. The apparatus is provided with a detecting unit for detecting positional information of an original image, and a discriminating unit for extracting the pattern data of a certain part of the original image and discriminating whether the original image is the predetermined image, based on the similarity between the pattern data and the predetermined pattern.

Claims

1. A controlling method for controlling an image forming apparatus which sequentially forms a plurality of color component images on a medium to produce a color image, said method comprising the steps of:

inputting color image data representing an original;

judging whether the original is a specific image based on the color image data; and

controlling the image forming apparatus based on the judgment, in a case where the original is the specific image, such that accurate image forming of at least one, but not all, of the plurality of color component images is prevented.

2. A method according to claim 1, wherein the image forming apparatus forms a plurality of color component images sequentially frame-by-frame in order to produce a color image having one image plane.

3. A method according to claim 1, wherein the color image data is generated by an image reader for scanning the original.

4. A method according to claim 3, wherein the image reader repeats the scanning in response to each of the plurality of color component images.

5. A method according to claim 1, wherein the judging of the specific image is based on matching of a predetermined pattern.

6. A method according to claim 5, wherein the predetermined pattern is a predetermined figure having a predetermined color.

7. A method according to claim 1, wherein a black component image is a last color component of the plurality of color component images to be formed by the image forming apparatus.

8. A method according to claim 1, wherein the controlling of the image forming apparatus is realized by modification of the last color component image.

9. A method according to claim 8, wherein the modification is realized by formation of a mirror image.

10. A method according to claim 8, wherein the modification is realized by synthesizing of a predetermined pattern.

11. A controlling apparatus for controlling an image forming apparatus which sequentially forms a plurality of color component images on a medium to produce a color image, comprising:

input means for inputting color image data representing an original;

judging means for judging whether the original is a specific image based on the color image data; and

controlling means for controlling the image forming apparatus based on the judgment of said judging means, in a case where the original is the specific image, such that accurate image forming of at least one, but not all, of the plurality of color component images is prevented.

12. An apparatus according to claim 11, wherein the image forming apparatus forms a plurality of color component images sequentially frame-by-frame in order to produce a color image having one image plane.

13. An apparatus according to claim 11, wherein the color image data is generated by an image reader for scanning the original.

14. An apparatus according to claim 13, wherein the image reader repeats the scanning in response to each of the plurality of color component images.

15. An apparatus according to claim 11, wherein the judging of the specific image is based on matching of a predetermined pattern.

16. An apparatus according to claim 15, wherein the predetermined pattern is a predetermined figure having a predetermined color.

17. An apparatus according to claim 11, wherein a black component image is a last color component of the plurality of color component images to be formed by the image forming apparatus.

18. An apparatus according to claim 11, wherein the controlling of the image forming apparatus is realized by modification of the last color component image.

19. An apparatus according to claim 18, wherein the modification is realized by formation of a mirror image.

20. An apparatus according to claim 18, wherein the modification is realized by synthesizing of a predetermined pattern.