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Automatic document scanning, analyzing and processing system based on intelligent image identification

A document scanning, analysis and processing technology, applied in the field of analysis based on orthogonal generalization projection, can solve the problems of reducing OCR recognition rate, reducing processing efficiency, and recognition rate affecting document images, etc.

Inactive Publication Date: 2012-04-18
GUIZHOU QIANZHI INFORMATION
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

If the scanning resolution is too low, the recognition rate will be reduced, but if the scanning resolution is too high, it will not only fail to improve the recognition rate, but also reduce the processing efficiency.
Whether the document itself is clear or not and the font will reduce the recognition rate of OCR
The recognition rate will ultimately affect the judgment of whether the document image has reversed information

Method used

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  • Automatic document scanning, analyzing and processing system based on intelligent image identification
  • Automatic document scanning, analyzing and processing system based on intelligent image identification
  • Automatic document scanning, analyzing and processing system based on intelligent image identification

Examples

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Embodiment Construction

[0046] The method designed by the invention makes full use of the character code distribution law of the document, and uses an analysis method based on orthogonal generalized projection to judge and correct the document image. The overall process is as figure 1 shown. The specific implementation process is as follows:

[0047] Step 1 Acquire the scanned image of the document, and remove the interference of the four blank margin areas in the document image.

[0048] Step 2 calculates the document image orthogonal generalization projection function curve variance. Such as Figure 4 Shown is the document image orthogonal grayscale integral projection function curve. Calculate and compare the variance of its horizontal integral projection function curve and the vertical integral projection function curve variance. Then according to the comparison result, if there is a 90° deflection, the scanned image of the original document is rotated 90° clockwise as the first correction r...

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Abstract

The invention relates to an image processing and mode identifying technology, in particular to an orthogonal generalized projection-based analyzing method applied to document scanning, analyzing and processing. The analyzing method comprises the following steps of: (1) determination of an effective region in an document image: locating an effective ROI (Region of Interest) in the document and removing four margin regions in the document image to obtain a minimum rectangular region containing the ROI; (2) 90-degree deflection detection of the document image: determining whether the image is deflected for 90 degrees by calculating a generalized projection curve variance of the document image, and performing corresponding processing on the document image; and (3) 180-degree inversion detection of the document image: determining whether the image is inverted for 180 degrees by calculating a mean piecewise function of the vertical grey integral projection of the document image which is processed in the step (1), and performing corresponding processing on the document image.

Description

technical field [0001] The invention relates to image processing and pattern recognition technology, in particular to an analysis method based on orthogonal generalization projection applied to document scanning analysis processing. Background technique [0002] The document scanning analysis system is proposed to identify and correct the 90° deflection and 180° inversion of the document image caused by the wrong orientation of the document to be scanned during the scanning process of the user, and improve the intelligence and automation of the user's scanning process. With the increasing electronicization of daily life and office environment, people will be faced with scanning a large number of paper documents and storing them in the computer. At this time, the use value of this system will be highlighted. [0003] As a computer external instrument, a scanner converts paper documents into electronic data and stores them in the computer, enabling users to process documents o...

Claims

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Application Information

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IPC IPC(8): G06K9/03G06T7/00
Inventor 赵黔
Owner GUIZHOU QIANZHI INFORMATION
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