PROCESSING A DIGITAL IMAGE OF CONTENT

• US 20090086275A1
• Filed: 09/28/2007
• Published: 04/02/2009
• Est. Priority Date: 09/28/2007
• Status: Abandoned Application

• Current Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Original Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Inventors: Liang, Jian, Yacoub, Sherif M., Zhou, Hanning
• Application Number:
  US11/864,208
• Publication Number:
  US 20090086275A1
• Time in Patent Office: Days
• US Class Current: 358/3.210
• CPC Class Codes: G06T 2207/10008 from scanner, fax or copier
• CPC Class Codes: G06T 2207/20012 Locally adaptive
• CPC Class Codes: G06T 2207/30176 Document
• CPC Class Codes: G06T 5/002 Denoising; Smoothing noise processing or correction adapted to be used in an image pickup device containing and electronic image sensor H04N23/81, H04N25/60 - H04N25/67
• CPC Class Codes: G06T 5/70 Denoising; Smoothing
• CPC Class Codes: G06T 7/10 Segmentation; Edge detection motion-based segmentation G06T7/215
• CPC Class Codes: G06V 10/25 Determination of region of interest [ROI] or a volume of interest [VOI]
• 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 1/3878 Skew detection or correction
• CPC Class Codes: H04N 1/40062 Discrimination between different image types, e.g. two-tone, continuous tone
• CPC Class Codes: H04N 1/409 Edge or detail enhancement; Noise or error suppression

Abstract

Systems, methods and processes for processing a digital image of content to generate an on-demand print ready document are presented. An obtained digital image of content includes a plurality of image pages. To process the digital image, for each image page in the digital image, the following steps are performed. Each image page is oriented such that a content bounding box of the image page is aligned with a desired page orientation. Boundary and content areas are identified for each image page, wherein the boundary area and the content area are separated by the content bounding box. Artifacts are removed from within the boundary area based on a set of first criteria. Artifacts are removed from within the content area based on a set of second criteria. The plurality of image pages are assembled in order of a desired sequence and an on-demand print ready document is generated with the plurality of assembled image pages.

Claims

1. A method for processing a digital image file of content to generate an on-demand print ready document, the method comprising:

obtaining a digital image file of content, the digital image file including a plurality of image pages;

for each image page in the digital image file;

orienting the current image page such that a content bounding box of the current image page is aligned with a desired page orientation;

identifying a boundary area and a content area for the image page, wherein the boundary area and the content area are separated by the content bounding box;

removing artifacts within the boundary area based on a set of first criteria,

removing artifacts within the content area based on a set of second criteria;

assembling the plurality of image pages in order of a desired sequence; and

generating an on-demand print ready document with the plurality of assembled image pages.

2. The method of claim 1, wherein the identified content area includes a plurality of content regions.

3. The method of claim 2, wherein the plurality of content regions include an image region which represents non-textual content on the image page.

4. The method of claim 3, wherein the non-textual content includes one of a graphical component, a picture component, or special characters.

5. The method of claim 2, wherein the plurality of content regions include a text region which represents textual content on the image page.

6. The method of claim 1, wherein the content bounding box encompasses the plurality of content regions.

7. The method of claim 1, wherein the boundary area is that area external to the content bounding box and within the page boundary of the image page.

8. The method of claim 1, further comprising receiving a request from a user for on-demand printing of content.

9. The method of claim 8, further comprising identifying the image content file corresponding to the content of the user request.

10. The method of claim 1, wherein based on the set of first criteria, an aggressive artifact removal process is applied.

11. The method of claim 1, wherein based on the set of second criteria, a conservative artifact removal process is applied.

12. The method of claim 1, further comprising identifying the image content file corresponding to the content.

13. The method of claim 1, further comprising aligning the plurality of image pages in the digital image file according to a common alignment.

14. A computer-implemented method for processing a digital image file of content to generate a print-ready document for on-demand printing, the method comprising:

obtaining a digital image file of content comprising a plurality of image pages, each image page including a content area and a boundary area;

for each of the plurality of image pages of the digital image file;

adjusting the orientation of the image page so that the content is aligned with a desired orientation;

segmenting the content area of the image page into image regions and text regions;

removing speckle artifacts in the boundary area and the areas between the image regions and text regions;

identifying border artifacts in the image page and removing the identified border artifacts; and

determining whether the image page meets noise removal criteria, wherein the noise removal criteria specifies an acceptable amount of speckle artifacts and border artifacts that can remain in the image page and if not, repeating the steps of adjusting, segmenting, removing, identifying and determining for the current image page; and

generating a print-ready format document for on-demand printing with the image pages.

15. The computer implemented method of claim 14, further comprising:

reassembling the image pages in a desired order; and

performing an alignment process on the reassembled image pages so that each image page is aligned across the image pages.

16. The computer implemented method of claim 14, wherein an image region comprises non-textual content on the image page.

17. The computer implemented method of claim 14, wherein a text region comprises textual content on the image page.

18. The computer implemented method of claim 14, wherein the content area comprises a union of all of the bounding boxes of image regions and text regions on the image page.

19. The computer implemented method of claim 14, wherein the boundary area is an area which is external to the content area and within the page boundary of the image page.

20. The computer implemented method of claim 14, wherein each content region is represented in a structured file format.

21. The computer implemented method of claim 14, further comprising receiving a request from a user for on-demand printing of content.

22. The computer implemented method of claim 21, further comprising identifying the image content file corresponding to the user'"'"'s request for on-demand printing of content.

23. A system for processing a content image file, the system comprising:

a processor;

a memory; and

a data store storing content image files of printed content, wherein a content image file includes a plurality of image pages corresponding to printed pages of the printed content;

wherein the system is configured to;

for each image page in the digital image file;

orient the current image page such that a content bounding box of the current image page is aligned with a desired page orientation;

identify a boundary area and a content area for the image page, wherein the boundary area and the content area are separated by the content bounding box;

remove artifacts within the boundary area based on a set of first criteria; and

remove artifacts within the content area based on a set of second criteria;

assemble the plurality of image pages in order of a desired sequence; and

generate an on-demand print ready document with the plurality of assembled image pages.

24. The system of claim 23, wherein the identified content area includes a plurality of content regions.

25. The system of claim 24, wherein the plurality of content regions include an image region which represents non-textual content on the image page.

26. The system of claim 25, wherein the non-textual content includes one of a graphical component, a picture component, or special characters.

27. The system of claim 24, wherein the plurality of content regions include a text region which represents a textual content on the image page.

28. The system of claim 23, wherein the content bounding box encompasses the plurality of content regions.

29. The system of claim 23, wherein the boundary area is an area external to the content bounding box and within the page boundary of the image page.

30. The system of claim 23, further comprising receiving a request from a user for on-demand printing of content.

31. The system of claim 30, further comprising identifying the image content file corresponding to the content of the user request.

32. The system of claim 23, wherein based on the set of first criteria, an aggressive artifact removal process is applied.

33. The system of claim 32, wherein based on the set of second criteria, a conservative artifact removal process is applied.

34. The system of claim 23, wherein the system is further configured to align the plurality of image pages in the digital image file according to a common alignment.