Image processing system for scanning a rectangular document

  • US 6,449,397 B1
  • Filed: 04/05/1999
  • Issued: 09/10/2002
  • Est. Priority Date: 04/05/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. An image processing system comprising:

  • a scanner comprising a scanning module for scanning a rectangular document and generating corresponding image signals, the rectangular document comprising four right angles, the image signals comprising a document image of the document in it; and

    a computer connected to the scanner comprising;

    a memory for storing programs and files;

    a processor for executing the programs stored in the memory;

    a scanner control program stored in the memory for controlling operations of the scanner and storing the image signals generated by the scanner into a main image file; and

    an image processing program stored in the memory for detecting a tilting angle of the document image in the main image file over which the document image is tilted about the tilting angle from an upright position and also angle variation of at least one right angle of the document image, and for correcting the document image to generate a rectangular and upright document image of the document according to the tilting angle and the angle variation of the document image.

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