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A Correction Method for Image Distortion

A correction method and image distortion technology, which can be used in image enhancement, image data processing, instruments, etc., and can solve the problems of large amount of interpolation calculation and affecting the speed of distortion correction.

Inactive Publication Date: 2015-12-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, image distortion correction mostly adopts the forward calculation method from the original image to the corrected image. This method is simple in the early stage, but the amount of interpolation calculation on the corrected image in the later stage is large, which affects the speed of distortion correction.

Method used

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  • A Correction Method for Image Distortion
  • A Correction Method for Image Distortion
  • A Correction Method for Image Distortion

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Embodiment Construction

[0047] The technical solution of the present invention will be described in detail below in conjunction with the embodiments.

[0048] A correction method for image distortion of the present invention, the correction method comprises the following steps:

[0049] Step 10) Acquiring original image data, including step 101) to step 103).

[0050] Step 101) Obtain the distortion coefficient k of the original image 1 , read the image width width and image height height of the original image;

[0051] Step 102) Establish an original image coordinate system o-xy with the center of the original image as the origin, the abscissa as the x-axis, and the y-axis as the y-axis; the row i and column j of each pixel in the original image correspond to the pixel in The coordinate relationship in the original image coordinate system satisfies formula (1):

[0052] x = j + 0.5 ...

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Abstract

The invention discloses an image distortion correction method, comprising the following steps of: (10) obtaining the data of an original image; (20) establishing an corrected image; (40) measuring the red value, green value and blue value of a pixel on the corrected image; and (50) establishing an corrected image: returning to step (30) until the red value, the green value and the blue value of each pixel on the corrected image are measured, thereby establishing the corrected image. Under the condition that the image distortion coefficient is known, each pixel on the distortion corrected image is inversely measured to obtain the position of the pixel in the original image, and then the red, green and blue color values of the pixel are measured by bilinear interpolation. The correction process is simple and efficient.

Description

technical field [0001] The invention belongs to the fields of computer vision and digital photogrammetry, and in particular relates to a method for correcting image distortion. Background technique [0002] In the field of computer vision and digital photogrammetry, it is often required to carry out spatial three-dimensional measurement of photographic objects through images. Among them, image distortion has a great influence on the measurement results, and it is required to correct the coordinates of image points by obtaining the distortion coefficient of the image during the measurement process. . At present, image distortion correction mostly adopts the forward calculation method from the original image to the corrected image. This method is simple in the early calculation, but the interpolation calculation on the corrected image in the later period is relatively large, which affects the speed of distortion correction. Contents of the invention [0003] Technical probl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 沙月进翁永玲陆中祥张小琴
Owner SOUTHEAST UNIV
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