Apparatus and method for image capture device assisted scanning

• US 20040080795A1
• Filed: 10/23/2002
• Published: 04/29/2004
• Est. Priority Date: 10/23/2002
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Bean, Heather N., Robins, Mark N.
• Application Number:
  US10/278,371
• Publication Number:
  US 20040080795A1
• Time in Patent Office: Days
• US Class Current: 358/505
• CPC Class Codes: H04N 1/00795 Reading arrangements details of scanning heads H04N1/024; scanning arrangements therefor H04N1/04
• CPC Class Codes: H04N 1/00816 Determining the reading area, e.g. eliminating reading of margins
• CPC Class Codes: H04N 1/56 Processing of colour picture signals H04N1/52 takes precedence
• CPC Class Codes: H04N 2201/0452 Indicating the scanned area, e.g. by projecting light marks onto the medium

Abstract

The present invention provides a system and method for scanning selected portions of a document. Briefly described, in architecture, one embodiment projects a beam of light onto a document portion, detects reflected light from the document portion with an image capture device, and determines a location of the document portion on the document based upon information received from the image capture device.

Claims

1. A method identifying portions of a document to be scanned, the method comprising the steps of:

projecting a beam of light onto a document portion;

detecting reflected light from the document portion with an image capture device; and

determining a location of the document portion on the document based upon information received from the image capture device.

2. The method of claim 1, further comprising the steps of:

communicating the determined location to a scanning device; and

scanning at least the document portion identified by the location.

3. The method of claim 1, further comprising the steps of:

scanning the document;

communicating data corresponding to the scanned document; and

determining the document portion from the received data.

4. The method of claim 1, further comprising the steps of:

projecting the beam of light using a predefined color onto the document portion;

determining a characteristic of the document portion based upon the color of the detected reflected light; and

communicating the determined characteristic to the scanning device such that the scanning device scans at least the document portion at a resolution corresponding to the determined characteristic.

5. The method of claim 4, further comprising the steps of:

specifying the predefined color of the beam of light as a first color, the first color corresponding to the document portion having a characterization of textual information such that when the step of scanning is performed, a first scanning resolution suitable for scanning text is used; and

specifying the predefined color of the beam of light as a second color, the second color corresponding to the document portion having a characterization of image information such that when the at least the document portion is scanned, a second scanning resolution suitable for scanning images is used.

6. The method of claim 5, further comprising the steps of:

receiving information from the scanning device, the received information corresponding to the document portion;

converting the received information into text using an optical character resolution program; and

storing the text into a memory as a text string.

7. The method of claim 5, further comprising the step of specifying the predefined color of the beam of light as a third color, the third color corresponding to the document portion having a predefined characterization of containing color information such that when the step of scanning is performed, a third scanning resolution suitable for scanning a plurality of colors on the document portion is used.

8. The method of claim 1, further comprising the steps of:

receiving information from the scanning device, the received information corresponding to at least the document portion; and

storing the received information in a memory.

9. The method of claim 8, further comprising the steps of:

determining a characteristic of the determined document portion based upon a color of the detected reflected light;

associating the characteristic with a memory location; and

determining the memory location based upon the determined characteristic so that the step of storing the information into the memory stores the information into the determined memory location.

10. The method of claim 1, further comprising the step of receiving a signal corresponding to an end of the steps of projecting, detecting and determining such that the step of communicating communicates the determined locations for the plurality of document portions to the scanning device.

11. The method of claim 1, further comprising the steps of:

projecting a flashing beam of light onto the document portion using a selected flashing rate selected from a plurality of flashing rates;

determining a characteristic of the determined document portion based upon the selected flashing rate of the detected reflected light; and

communicating the determined characteristic to the scanning device such that the scanning device scans at least the document portion at a resolution corresponding to the determined characteristic.

12. A system which identifies portions of a document to be scanned, comprising:

a light pen configured to generate a beam of light;

an image capture device configured to detect reflected light from a document, the reflected light corresponding to the beam of light generated by the light pen;

an operator input device configured to select at least one characteristic associated with a selected document portion selected from the document;

a processor configured to receive information from the image capture device and the information from the operator input device such that a location of the selected document portion and a characteristic of the selected document portion are determined; and

a scanning device interface configured to couple to a scanning device, and further configured to communicate the determined location and characteristic of the selected document portion to the scanning device.

13. The system of claim 12, further comprising the scanning device configured to receive the determined location and characteristic of the selected document portion, and further configured to select a scanning resolution from a plurality of scanning resolutions, the selected scanning resolution corresponding to the characteristic, and further configured to scan at least the document portion with the selected scanning resolution.

14. The system of claim 12, further comprising a document transport device, the document transport device configured to communicate the document from a viewing region to the scanning device after the information from the image capture device is communicated to the processor.

15. The system of claim 12, further comprising a memory configured to receive and store information corresponding to the selected document portion scanned by the scanning device.

16. The system of claim 15, further comprising an optical character resolution (OCR) logic configured to receive information corresponding to the scanned selected document portion when the characteristic corresponds to textual information, configured to determine the textual information residing in the scanned selected document portion, and further configured to generate a text string corresponding to the determined textual information.

17. The system of claim 12, further comprising a video digital camera configured to capture and communicate a video image of sufficient duration so that at least the location of the selected document portion is determinable.

18. The system of claim 12, further comprising a still digital camera configured to sequentially capture a plurality of still images, such that information corresponding to the still images are periodically communicated so that at least the location of the selected document portion is determinable.

19. The system of claim 12, wherein the light pen configured to generate a plurality of different colored light beams, each one of the colors of the light beams corresponding to a predetermined characteristic that is associated with the selected document portion.

20. The system of claim 19, wherein the light pen is configured to generate the plurality of different colored light beams using a visible light spectrum.

21. The system of claim 19, wherein the light pen is configured to generate the plurality of different colored light beams using a laser light device.

22. The system of claim 12, wherein the light pen configured to generate the light beam with a plurality of flashing rates, each one of the flashing rates corresponding to a predetermined characteristic that is associated with the selected document portion.

23. A system for identifying portions of a document to be scanned, comprising:

means for projecting a beam of light onto a document portion, the beam of light having a color selected from a plurality of colors, each one of the plurality of colors uniquely associated with one of a plurality of characteristics;

means for detecting reflected light from the document portion with an image capture device;

means for determining a location of the document portion on the document based upon information received from the image capture device;

means for determining at least one characteristic based upon the color of the detected reflected light; and

means for communicating the determined location and characteristic to a scanning device such that the scanning device generates information corresponding to the document portion.

24. A computer-readable medium having a program for identifying portions of a document to be scanned, the program comprising logic configured to perform the steps of:

receiving information from an image capture device corresponding to detected reflected light from a document portion;

determining a location of the document portion on the document based upon information received from the image capture device;

determining at least one characteristic of the document portion based upon information corresponding to color of the detected reflected light; and

communicating the determined location and characteristic to a scanning device such that the scanning device generates information corresponding to the document portion.

25. A system which identifies portions of a document to be scanned, comprising:

an image capture device interface configured to couple to an image capture device, and further configured to receive information from the image capture device corresponding to detected reflected light from a document, the reflected light corresponding to light generated by a light pen;

an operator input device interface configured to couple to an operator input device, and further configured to receive information from the operator input device corresponding to at least one selected characteristic of a selected document portion selected from the document;

a processor configured to receive the information from the image capture device and the information from the operator input device such that a location of the selected document portion and the characteristic of the selected document portion are determined; and

a scanning device interface configured to couple to a scanning device, and further configured to communicate the determined location and the determined characteristic of the selected document portion to the scanning device.