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A method and a device for correcting a barrel-shaped distortion image

A barrel distortion, image technology, applied in the field of image processing

Active Publication Date: 2019-03-29
ALIBABA (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the case where the barrel distortion images to be corrected are shot with different types of lenses, the checkerboard template method provided by the prior art is not the preferred solution

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  • A method and a device for correcting a barrel-shaped distortion image
  • A method and a device for correcting a barrel-shaped distortion image
  • A method and a device for correcting a barrel-shaped distortion image

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0045]The invention provides a method for correcting a barrel-shaped distorted image, comprising: processing the barrel-shaped distorted image to obtain a contour map of the barrel-shaped distorted image; The points are stored in a point set; for each point set, it is judged whether the line segment formed by the pixels in the point set includes an arc satisfying the preset curvature threshold; if the line segment formed by the pixels in the point set Set the arc of the curvature th...

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Abstract

The embodiment of the application discloses a method and a device for correcting a barrel-shaped distorted image, which relate to the technical field of image processing. The method comprises the following steps of: firstly, screening out the arc to be processed with distortion, and then repeatedly straightening out the arc to be processed in the barrel distortion image until the sum of reducibility values is greater than or equal to a preset threshold value, and determining an optimal barrel distortion correction parameter. Then, based on the optimal barrel distortion correction parameters, pixel points in the barrel distortion image are projected on the preset perspective plane corresponding to the sphere to obtain a correction image. Compared with the existing checkerboard pattern, thepresent invention can complete the correction of the barrel distortion image without pre-making the checkerboard template and obtaining the camera to be corrected and the parameters thereof, and has stronger universality.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to a correction method and device for a barrel-shaped distorted image. Background technique [0002] Currently, making map data based on street view images is one of the important means in the field of map data making. In order to collect more street view information, the cameras used for street view collection generally use wide-angle lenses, because wide-angle lenses have the characteristics of short focal length and large viewing angle, and can capture more information than standard lenses. However, the image taken by the wide-angle lens has a barrel-shaped distortion, such as figure 1 As shown, this distortion phenomenon is called barrel distortion. Objects in barrel distortion images are distorted, which brings difficulties to automatic image recognition. [0003] In order to correct the barrel-shaped distorted image, the existing technology generally adop...

Claims

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T5/80
Inventor 徐浩梅树起黄亮徐牧
Owner ALIBABA (CHINA) CO LTD