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Fisheye lens image distortion correction method and apparatus

An image distortion correction and fisheye lens technology, applied in the field of image processing, can solve problems such as complex calculation process and huge calculation amount

Inactive Publication Date: 2016-11-16
深圳市凌云视迅科技有限责任公司
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Problems solved by technology

[0006] In order to overcome the problems of complex calculation process and huge calculation amount of fisheye lens image distortion correction in the related art, this application provides a fisheye lens image distortion correction method and device

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  • Fisheye lens image distortion correction method and apparatus
  • Fisheye lens image distortion correction method and apparatus
  • Fisheye lens image distortion correction method and apparatus

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Embodiment Construction

[0073] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0074] In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of the application, but those skilled in the art will understand that the application may be practiced without these specific details. In other embodiments, well-known methods, procedures, components and circuits have not been described in detail so as n...

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Abstract

Embodiments of the invention disclose a fisheye lens image distortion correction method and apparatus. The method comprises the steps of obtaining an orthogonal oblique grid target image; extracting a grid center line according to the orthogonal oblique grid target image; calculating a distortion center according to the grid center line; calculating distortion coefficients k1 to k6 according to the grid center line and the distortion center; and correcting an image shot by a fisheye lens through using a six-parameter correction model according to the distortion center and the distortion coefficients. According to the fisheye lens image distortion correction method provided by the embodiment of the invention, only a single target needs to be used, the calculation process is simple, the calculation amount is small, the precision is high, and fisheye lens image distortion and image asymmetry errors caused by non-coincidence of a lens center and an image center can be effectively eliminated.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a fisheye lens image distortion correction method and device. Background technique [0002] A fisheye lens is a special lens with an angle of view close to or equal to 180°. It is a kind of ultra-wide-angle lens. The number of cameras is widely used in fields such as panoramic imaging, security detection and geographic measurement. However, the imaging process of the fisheye lens is nonlinear, and the magnification of the area far away from the optical axis is lower than that near the optical axis, which will appear in the image plane as figure 1 ( figure 1 The bulging scenario shown in the example of a fisheye lens image), that is, barrel distortion. Distorted images will lead to problems such as wrong feature extraction, imprecise target positioning, and large deviations in measurement results in applications, so image distortion needs to be corrected. [0003] Fis...

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Application Information

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IPC IPC(8): G06T5/00G06T3/00
CPCG06T3/047G06T5/00
Inventor 杨艺董学广张勇
Owner 深圳市凌云视迅科技有限责任公司
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