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Automatic geometric distortion correction method of digital image

A digital image and geometric distortion technology, applied in image enhancement, image data processing, graphics and image conversion, etc., can solve the problems of blurred edge transitions and inaccurate image details, and achieve the effect of improving speed and ensuring accuracy.

Inactive Publication Date: 2013-02-13
SUZHOU LIANGJIANG TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for automatic correction of geometric distortion of digital images, which solves the problems in the prior art that the details of the image after the automatic correction of digital image geometric distortion are not accurate enough, and the edge transitions will appear blurred, etc.

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  • Automatic geometric distortion correction method of digital image
  • Automatic geometric distortion correction method of digital image
  • Automatic geometric distortion correction method of digital image

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Embodiment Construction

[0032] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these examples are used to illustrate the present invention and not to limit the scope of the present invention. The implementation conditions used in the examples can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not indicated are usually the conditions in routine experiments.

[0033] 1. Segment the image first after inputting the image: convert the color image to a grayscale image, and binarize the grayscale image (such as using the otsu (maximum inter-class variance) algorithm) to convert the grayscale value to "0" according to the grayscale characteristic " or "1", and the area where "0" and "1" alternate is the area where the gray level changes drastically. Then the image is evenly divided into multiple non-overlapping sub-images (for example, 48) and marked and stored separately. ...

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Abstract

The invention discloses an automatic geometric distortion correction method of a digital image, and the method is characterized by comprising the following steps of (1) inputting the digital image, and segmenting the digital image into a plurality of image blocks to be respectively marked and stored; (2) enhancing the digital image, detecting the margin of the digital image, and stretching the strength of the original margin so as to enhance the margin; and clearing burrs of the image margin; and (3) extracting the outline of the image, performing spatial conversion, judging an area of an interpolating point and respectively performing linear interpolation and nonlinear interpolation. Due to adoption of the method, high definition of the outputted image is realized for the details of the margin on the basis of automatically correcting the geometric distortion image.

Description

technical field [0001] The invention belongs to the technical field of digital image processing, and in particular relates to a method for automatically correcting geometric distortion of a digital image. Background technique [0002] The traditional interpolation method used in the existing digital image automatic correction method for geometric distortion makes the details of the corrected image inaccurate, especially blurring at the edge transition. Some current professional image processing software basically requires manual participation, and they cannot realize the automation of distortion correction. However, manual participation is not only labor-intensive but also prone to errors. [0003] Traditional interpolation methods are divided into nonlinear interpolation and linear interpolation. The commonly used non-linear interpolation method is the nearest neighbor interpolation method, and its operation speed is relatively fast. However, it only uses the gray value o...

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Application Information

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IPC IPC(8): G06T5/00G06T3/40
Inventor 陈国庆尹爽
Owner SUZHOU LIANGJIANG TECH
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