Determining maintenance conditions in a document scanner

1. A method performed by a data processing system, comprising:

scanning a document to produce a document image;

analyzing the document image, wherein analyzing the document image includes one or more of determining if there is a dark obstruction in the document image and determining if there is a bright obstruction in the document image;

based on the analysis, determining that there is a condition of the data processing system that requires maintenance and that produced the dark obstruction or the bright obstruction; and

notifying at least one user of the condition of the data processing system that requires maintenance and stopping scanning additional documents so that the user can correct the condition of the data processing system that requires maintenance.

2. The method of claim 1 , further comprising stopping processing of at least some other documents based on the determination that the data processing system requires maintenance.

3. The method of claim 1 , wherein the data processing system is a mail processing system and the document is a mail item.

4. The method of claim 1 , wherein analyzing the document image includes determining if there is a blurred distortion in the document image.

5. The method of claim 1 , wherein scanning the document is performed as the document is transported past an imager that views the document through an aperture in a platen, and includes producing a current image of a background of the view through the aperture before or after the document is transported past the imager, and wherein the current image of the background is part of the document image.

6. The method of claim 5 , wherein analyzing the document includes comparing a reference image to the current image of the background to determine, based on the comparison, that there is the dark obstruction in the document image or that there is the bright obstruction in the document image.

7. The method of claim 5 , wherein analyzing the document includes producing a current waveform corresponding to the current image of the background, comparing a reference waveform to the current waveform to determine, based on the comparison, that there is the dark obstruction in the document image or that there is the bright obstruction in the document image.

8. The method of claim 1 , wherein analyzing the document includes performing an OCR process on text in the document image, identifying a vertical recognition threshold based on the OCR process, and determining that the document image includes a blurred distortion based on the vertical recognition threshold.

9. The method of claim 1 , wherein determining that there is a condition of the data processing system that requires maintenance includes determining that a document scanner requires maintenance in order to produce useful document images.

10. The method of claim 1 , wherein the condition of the data processing system that requires maintenance includes a change in a speed of transport of the document by the data processing system.

11. The method of claim 1 , wherein notifying at least one user of the condition that requires maintenance includes at least one of displaying a notification on a display, activating an audio, and activating a visual indicator.

12. A mail processing system, comprising:

a platen having an aperture; and

an imager configured to scan a document as the document is transported past the aperture; wherein the mail processing system is configured to

scan the document to produce a document image;

analyze the document image, wherein analyzing the document image includes one or more of determining if there is a dark obstruction in the document image and determining if there is a bright obstruction in the document image;

based on the analysis, determine that there is a condition of the mail processing system that requires maintenance and that produced the dark obstruction or the bright obstruction; and

notify at least one user of the condition of the mail processing system that requires maintenance and stop scanning additional documents so that the user can correct the condition of the mail processing system that requires maintenance.

13. The mail processing system of claim 12 , wherein the mail processing system also stops processing of at least some other documents based on the determination.

14. The mail processing system of claim 12 , wherein analyzing the document image includes determining if there is a blurred distortion in the document image.

15. The mail processing system of claim 12 , wherein scanning the document includes producing a current image of a background of the view through the aperture before or after the document is transported past the aperture, and wherein the current image of the background is part of the document image.

16. The mail processing system of claim 15 , wherein analyzing the document includes comparing a reference image to the current image of the background to determine, based on the comparison, that there is the dark obstruction in the document image or that there is the bright obstruction in the document image.

17. The mail processing system of claim 15 , wherein analyzing the document includes producing a current waveform corresponding to the current image of the background, comparing a reference waveform to the current waveform to determine, based on the comparison, that there is the dark obstruction in the document image or that there is the bright obstruction in the document image.

18. The mail processing system of claim 12 , wherein analyzing the document includes performing an OCR process on text in the document image, identifying a vertical recognition threshold based on the OCR process, and determining that the document image includes a blurred distortion based on the vertical recognition threshold.

19. The mail processing system of claim 12 , wherein notifying at least one user of the condition that requires maintenance includes at least one of displaying a notification on a display, activating an audio, and activating a visual indicator.

20. A non-transitory computer readable medium having program instructions tangibly stored thereon executable by a processor to perform a method comprising:

scanning a document using a document scanner to produce a document image;

analyzing the document image, wherein analyzing the document image includes one or more of determining if there is a dark obstruction in the document image and determining if there is a bright obstruction in the document image

determining, based on the analysis of the document image that there is a condition of the document scanner that requires maintenance and that produced the dark obstruction or the bright obstruction; and

notifying a user of the condition of the document scanner that requires maintenance and stopping scanning additional documents so that the user can correct the condition of the document scanner that requires maintenance.