Method and device for calibrating fish-eye lens radial distortion

A radial distortion, fisheye lens technology, applied in the field of electronics, can solve problems such as low accuracy of calibration results

Inactive Publication Date: 2014-10-01
HUAWEI TECH CO LTD
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Problems solved by technology

However, there are many types of distortion in the images captured by the fisheye lens, among which the radial distortion is considered to be the main factor affecting the image quality, because the traditional radial distortion calibration process is limited to fitting the arc corresponding to a single line to Obtain the distortion parameters to generate the distortion calibration model, which leads to the low accuracy of the calibration results of the distortion calibration model, which cannot solve the problem of radial distortion of the fisheye lens well.

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  • Method and device for calibrating fish-eye lens radial distortion
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[0073] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0074] The following will be combined with figure 1 - attached Figure 4 , the method for calibrating the radial distortion of the fisheye lens provided by the embodiment of the present invention is introduced in detail.

[0075] See figure 1 , which provides a schematic flowchart of a method for calibrating radial distortion of a fisheye lens according to an embodiment of the present invention. Such as figure 1 As shown, the method in the embodiment of th...

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Abstract

The embodiment of the invention discloses a method and device for calibrating fish-eye lens radial distortion. The method includes the following steps of obtaining a calibration image comprising at least two sets of space parallel straight lines; conducting fitting processing on circle center collinear arc sets mapped by each set of space parallel straight lines in the at least two sets of space parallel straight lines on a distortion image; generating a distortion calibration model according to a fitting processing result. The accuracy of calibrating results of the distortion calibration model can be improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a calibration method and a calibration device for radial distortion of a fisheye lens. Background technique [0002] With the continuous development and improvement of electronic technology, cameras, mobile phones and other terminal devices with camera and video functions have been widely used in people's daily life. In order to increase the expression of captured images, users usually use some special effects Lenses, such as: fisheye lens, tilt-shift lens, macro lens, etc., increase the effect and variety of image shooting. [0003] The fisheye lens is an extreme wide-angle lens. In order to achieve the maximum photographic viewing angle, the diameter of the front lens protrudes toward the front of the lens in a parabolic shape. The angle of view of the fisheye lens strives to reach or exceed what the human eye can see. scope. Therefore, there is a big difference between t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 杜歆方奎朱云芳
Owner HUAWEI TECH CO LTD
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