Quasi-reprographics with variable embedded data with applications to copyright management, and distribution control

• US 5,901,224 A
• Filed: 10/21/1996
• Issued: 05/04/1999
• Est. Priority Date: 10/21/1996
• Status: Expired due to Term

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Hecht, David L.
• Primary Examiner(s): Hayes, Gail O.
• Assistant Examiner(s): Laufer, Pinchus M.
• Application Number:
  US08/734,570
• Time in Patent Office: 925 Days
• Field of Search: 380/3, 380/4, 380/51, 380/54, 380/55, 380/23, 399/366, 399/84, 283/113, 382/100
• US Class Current: 713/179
• CPC Class Codes: H04N 1/32203 Spatial or amplitude domain methods H04N1/32309 takes precedence
• CPC Class Codes: H04N 1/32208 involving changing the magnitude of selected pixels, e.g. overlay of information or super-imposition H04N1/32219, H04N1/32224 take precedence
• CPC Class Codes: H04N 1/32229 with selective or adaptive application of the additional information, e.g. in selected regions of the image H04N1/32213 takes precedence
• CPC Class Codes: H04N 2201/3233 of authentication information, e.g. digital signature, watermark
• 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
• CPC Class Codes: H04N 2201/3274 Storage or retrieval of prestored additional information

Abstract

A method and apparatus for quasi-reprographically replicating a source document. The source document is digitized, appropriate locations for embedded code are detected, and any embedded code located in the digitized document along with the detected locations are forwarded to a decoder. The decoder forwards the decoded information to a control unit which processes this information and forwards it to a encoder whereafter it is inserted in the digitized document. The hardcopy replication of the source document being substantially visually identical to the source document, even though new or additional embedded machine-readable data has been added or existing data has been changed. The process occurs without intervention by an operator and without knowledge of the operator producing the replicated documents.

Claims

1. A quasi-reprographic apparatus comprising:

a document input configured to receive and digitize a source document which is in a fixed format;

a document storage in operative connection with the document input, configured to store the digitized version of the source document;

an embedded code detector in operative connection with the document storage, configured to detect locations in the digitized document appropriate for holding embedded machine readable code and to determine whether embedded machine readable code exists in the digitized document;

an embedded code decoder in operative connection with the embedded code detector, configured to decode embedded machine readable code detected by the embedded code detector;

a control unit, including a control memory, a processor and a control device, in operative connection with the embedded code decoder, the control unit configured (i) to receive data representing the decoded embedded code and its location in the digitized document, data indicating that no embedded code exists in the digitized document, and data representing an area in the digitized document appropriate for insertion of embedded code, the area appropriate for insertion of the embedded code being an area of uniform color on the source document, (ii) to process the decoded embedded code, (iii) to generate additional data for insertion into the digitized document as embedded code in accordance with instructions stored in the control unit; and

(iv) to determine whether the area appropriate for insertion of the embedded code is sufficiently sized to hold the additional data such that the area of uniform color will be visually unaltered upon a hardcopy reproduction of the source document;

an embedded code encoder in operative connection with the control unit and the document storage, configured to receive the additional data from the control unit, to transform the additional data into additional embedded code and, to insert the additional embedded code at a selected location in the digitized document; and

,

an output device for outputting a hardcopy reproduction of the digitized document having the additional embedded code.

2. The quasi-reprographic system according to claim 1 further including a data input device for inputting data to the control unit, for use in processing data received from the embedded code decoder.

3. The quasi-reprographic system according to claim 1 wherein the source document contains at least one of machine readable and human readable data.

4. The quasi-reprographic system according to claim 1 wherein the embedded code is a self-clocking glyph code which is an integral part of an image in the source document.

5. The quasi-reprographic system according to claims 1 further including at least one of (i) a pointer inserted into the digitized document and reproduced in the hardcopy reproduction, the pointer constructed to point to a memory area holding a portion of the additional data which was determined to be of a size greater than what could be held in the appropriate area of the digitized document, such that the area of uniform color is unaltered upon a hardcopy reproduction of the source document, and to point to instructions resulting in the printing of an appendage document holding the portion of the additional data which was determined to be of a size greater than what could be held in the appropriate area of the digitized document such that the area of uniform color is unaltered upon a hard copy reproduction of the source document (ii) a means for reducing an amount of error correction which is part of the embedded data.

6. The quasi-reprographic system according to claim 1 further including means for printing a human readable digital watermark, on a hardcopy reproduction of the source document.

7. The quasi-reprographic system according to claim 6 wherein a machine readable watermark is included as part of the human readable watermark.

8. A method of generating a hardcopy reproduction of a source document using a reprographic apparatus having quasi-reprographic capabilities, comprising the steps of:

digitizing the source document;

storing the digitized source document in a document storage;

detecting locations in the digitized document appropriate for holding embedded machine readable code and determining whether embedded machine readable code exists in the digitized document;

decoding embedded machine readable code detected in the determining step;

selectively generating information representing (i) detected embedded machine readable code and its location in the digitized document (ii) that no embedded code was detected in the digitized document and (iii) an area appropriate for insertion of embedded code in the digitized document, the area appropriate for insertion of the embedded code being an area of uniform color on the source document;

transmitting the selectively generated information to a control unit;

processing the transmitted information within the control unit to generate at least one of new and additional data for the digitized document;

encoding at least one of the new and additional data into at least one of new and additional embedded code;

determining whether or not the area appropriate for insertion of the embedded code is sufficiently sized to hold the new or additional data such that the area of uniform color is visually unaltered upon a hardcopy reproduction of the source document;

inserting at least one of the new and additional embedded code at the area appropriate for insertion of the embedded code in the digitized documents when it is determined the area appropriate for insertion of the embedded code is of a sufficient size; and

generating a hardcopy reproduction of the source document.

9. The method according to claim 8 wherein the embedded code is a graphical machine readable code.

10. The method according to claim 8 wherein the embedded code is a self-clocking glyph code which is an integral part of an image in the source document.

11. The method according to claim 8 further including:

inputting external data to the quasi-reprographic process from a source external to the reprographic apparatus; and

using the inputted data in the processing steps to generate at least one of the new and additional data for the digitized document.

12. The method according to claim 8 wherein the step of inserting further includes replacing the embedded code detected in the detecting step with the new or additional embedded code at the location of the replaced embedded code.

13. The method according to claim 8 wherein the new or additional embedded data is inserted into the hardcopy reproduction automatically, without operator intervention, and without operator knowledge.

14. The method according to claim 8 wherein the source document holds at least one of machine readable and human readable data in a fixed format.

15. The method according to claim 8 further including producing a plurality of reproductions of the source document, wherein at least one of the plurality of reproductions has embedded code different from another one of the plurality of reproductions.

16. The method according to claim 8 further including, during the processing step,

generating data representing a human readable watermark;

encoding the data representing the human readable watermark using the embedded code; and

,

inserting the generated data, coded with the embedded code, in the digitized document, such that when the hardcopy reproduction is generated, the human readable watermark is generated in addition to any image and data originally on the source document.

17. The method according to claim 16 wherein an appearance of the human readable watermark is altered from a first reproduction of the source document to a second reproduction of the source document.

18. The method according to claim 8 further including at least one of (i) inserting a pointer into the digitized document and reproducing the pointer in the hardcopy reproduction, the pointer pointing to a memory area holding a portion of one of the new and additional data which was determined to be of a size greater than what could be held in the appropriate area of the digitized document such that the area of uniform color is unaltered upon a hardcopy reproduction of the source document, and (ii) pointing to instructions resulting in the printing of an appendage document holding the portion of one of the new and additional data which was determined to be of a size greater than what could be held in the appropriate area of the digitized document such that the area of uniform color is unaltered upon a hard copy reproduction of the source document (ii) reducing an amount of error correction which is part of the embedded data.