Method and apparatus for adaptive image processing by recognizing a characterizing indicium in a captured image of a document

• US 5,038,392 A
• Filed: 02/12/1990
• Issued: 08/06/1991
• Est. Priority Date: 02/12/1990
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Morris, James K., Probst, Robert E., Utley, Robert A.
• Primary Examiner(s): Brinich, Stephen
• Application Number:
  US07/478,325
• Time in Patent Office: 540 Days
• Field of Search: 382/61, 382/56
• US Class Current: 382/175
• CPC Class Codes: G06F 16/93 Document management systems
• CPC Class Codes: G06Q 40/02 Banking, e.g. interest calculation or account maintenance credit or loans G06Q40/03
• CPC Class Codes: G06V 30/414 Extracting the geometrical structure, e.g. layout tree; Block segmentation, e.g. bounding boxes for graphics or text
• CPC Class Codes: H04N 1/00204 with a digital computer or a digital computer system, e.g. an internet server programmed control between transmitter and receiver or between image input and image output device H04N1/32561
• CPC Class Codes: H04N 1/00968 by scanning marks on a sheet mark-sheet input means H04N1/00355; sensing record carriers G06K7/00
• CPC Class Codes: H04N 1/32561 using a programmed control device, e.g. a microprocessor
• CPC Class Codes: H04N 1/33315 reading or reproducing mode only, e.g. sheet size, resolution
• CPC Class Codes: H04N 1/33369 Storage of mode or retrieval of prestored mode
• CPC Class Codes: H04N 1/38 Circuits or arrangements for blanking or otherwise eliminating unwanted parts of pictures H04N1/387 takes precedence
• CPC Class Codes: H04N 1/40 Picture signal circuits H04N1/387 takes precedence
• CPC Class Codes: H04N 1/41 Bandwidth or redundancy reduction by scanning H04N1/17 ; methods or arrangements for coding, decoding, compressing or decompressing digital video signals H04N19/00
• CPC Class Codes: H04N 2201/0081 Image reader H04N2201/0091 - H04N2201/0094 take precedence
• CPC Class Codes: H04N 2201/0082 Image hardcopy reproducer H04N2201/0091 - H04N2201/0094 take precedence
• CPC Class Codes: H04N 2201/0086 Image transceiver H04N2201/0093 and H04N2201/0094 take precedence
• CPC Class Codes: H04N 2201/0087 Image storage device

Abstract

In a system for capturing an image of a document having a characterizing indicium associated therewith, the invention includes the step of storing in the system a plurality of document templates. Each document template defines locations of a first type and second type information blocks on a corresponding one of a plurality of document types. The document templates are accessible by an indicium value. The invention further includes storing in the system a table relating the first type information block to first type processing parameters and a second type information block to second type processing parameters. The invention further includes the step of capturing an image of the document and storing the image in an image buffer. Then, a characterizing indicium associated with the document is recognized by the system. Thereafter, one of the plurality of document templates is accessed in response to a value of the recognized characterizing indicium associated with the document. Then, a first type block of information is selectively accessed from the image of the document in the image buffer, at a location defined by the document template. Thereafter, first type processing parameters are selectively accessed from the table corresponding to the first type information block. Using the first type processing parameters so accessed, the information from the first type block is processed. This adaptive processing can include a selected image compression algorithm suited to the particular type of image in the data block. The adaptive processing can further include the preparation of an output image data object file which is routed to a recipient or to a work flow in response to the particular document type represented by the indicium associated with a document. In this manner, the image of the document can be adaptively processed by the system.

Claims

1. In a system for capturing an image of a document having a characterizing indicium associated therewith, a method for adaptively processing the image of the document, comprising the steps of:

storing in said system a plurality of document templates, each defining locations of first type and second type information blocks on a corresponding one of a plurality of document types, and accessible by an indicium value;

storing in said system a table relating said first type information block to first type processing parameters and said second type information block to second type processing parameters;

capturing an image of a document and storing said image in an image buffer;

recognizing a characterizing indicium associated with said document;

accessing one of said plurality of document templates in response to a value of said recognized characterizing indicium;

selectively accessing a first type block of information from said image of said document in said image buffer, at a location defined by said accessed document template;

selectively accessing said first type processing parameters from said table corresponding to said first type information block;

processing said information from said first type block using said first type processing parameters;

whereby the image of the document is adaptively processed.

2. The method of claim 1 which further comprises the steps of:

selectively accessing a second type block of information from said image of said document in said image buffer, at a location defined by said accessed document template;

selectively accessing said second type processing parameters from said table corresponding to said second type information block;

processing said information from said second type block using said second type processing parameters.

3. The method of claim 2 wherein said first type information block contains pictorial information and said second type information block contains text information.

4. The method of claim 3 wherein said processing of said pictorial information from said first type block produces a first type data compression of said pictorial information and said processing of said text information from said second type block produces a second type data compression of said text information.

5. The method of claim 1 wherein said characterizing indicium is read from a control card associated with said document.

6. The method of claim 1 wherein said characterizing indicium resides on said document.

7. The method of claim 6 wherein said indicium has an arbitrary location on said document.

8. The method of claim 7 wherein said indicium is located at a predetermined location on said document.

9. The method of claim 1 wherein said processing of said information from said first type block includes digitally filtering said information from said first type block.

10. The method of claim 1 wherein said processing of said information from said first type block includes analog filtering of said first type information in said first type block.

11. The method of claim 1 wherein said processing of said information from said first type block includes employing threshold discrimination to said first type image in said first type block.

12. The method of claim 1 wherein said processing of said information from said first type block includes the application of a transfer function to said first type information in said first type block.

13. The method of claim 1 wherein said processing of said information from said first type block includes the application of a dithering mask to said first type information in said first type block.

14. The method of claim 1 wherein said processing of said information from said first type block includes the compression of said first type information in said first type block.

15. In a system for capturing an image of a document having a characterizing indicium associated therewith, a method for adaptively processing the image of the document, comprising the steps of:

storing in said system a table relating values of said characterizing indicium to processing parameters corresponding to one of a plurality of document types, and accessible by an indicium value;

capturing an image of a document and storing said document in an image buffer;

recognizing a characterizing indicium associated with said document;

accessing said processing parameters for one of said plurality of document types in response to a value of said recognized characterizing indicium;

processing said document image using said accessed processing parameters;

whereby the image of a document is adaptively processed.

16. The method of claim 15 wherein said processing of said document includes selectively capturing the image on both sides of said document, in response to said characterizing indicium.

17. The method of claim 15 wherein said document image is selectively rotated through a reorientation angle in response to said characterizing indicium.

18. The method of claim 15 wherein said processing is aborted in response to said characterizing indicium.

19. The method of claim 15 wherein said document image is transmitted to a destination location over a communications link in response to said characterizing indicium.

20. The method of claim 15 wherein said processing of said document includes the selective capturing of an image of a document on one side or two sides of said document.

21. The method of claim 15 wherein said processing includes the transport of said document into a designated receptacle in response to said characterizing indicium.

22. The method of claim 15 wherein said processing includes storage of said document image in a data base organized with an inverted file index whose indexing term is formulated by said characterizing indicium.

23. In a system for capturing an image of a document having a characterizing indicium associated therewith, a method for adaptively processing the image of the document, comprising the steps of:

storing in said system a table relating values of said characterizing indicium to processing parameters corresponding to one of a plurality of document types;

reading said characterizing indicium associated with said document;

sensing the color of said document;

accessing said processing parameters corresponding to said characterizing indicium and selecting a physical filter corresponding to said sensed color;

capturing an image of said document, modified by said physical filter, and storing said modified image in an image buffer;

whereby the image of said document is adaptively processed.

24. In a system for capturing an image of a document having a characterizing indicium associated therewith, a method for adaptively processing the image of the document, comprising the step of:

storing in said system a table relating values of said characterizing indicium to processing parameters corresponding to one of a plurality of document types;

reading said characterizing indicium associated with said document;

capturing an image of said document, modified by a physical filter, and storing said modified image in an image buffer;

whereby the image of said document is adaptively processed.

25. The method of claim 24 wherein said indicium is read from a control card associated with said document.

26. The method of claim 24 wherein said indicium resides on said document.