Wide-angle lens calibration and image correction method

A wide-angle lens, image correction technology, applied in image enhancement, image analysis, image data processing and other directions, can solve problems such as inability to meet real-time processing, complex algorithms, complex matrix operations, etc., achieving low cost, simple calculation, and low correction calculation. Effect

Active Publication Date: 2018-06-22
DALIAN NEUSOFT UNIV OF INFORMATION
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Problems solved by technology

Due to the complexity of the algorithm in the existing technology, including polynomial solution and complex matrix operation, the distortion parameters can only be solved by the upper computer software, and the calculation of the calibration parameters cannot be directly realized by the embedded device, which cannot meet the needs of real-time processing.

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  • Wide-angle lens calibration and image correction method

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[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0045] Such as figure 1 As shown, the present invention discloses a wide-angle lens calibration and image correction method, which is characterized in that it comprises the following steps:

[0046] S1: Select an n×n checkerboard image as a calibration template, where n is an even number greater than 2;

[0047] S2: adjusting the positions of th...

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Abstract

The invention discloses a wide-angle lens calibration and image correction method. The method comprises the following steps: preparing a chessboard lattice image of 4*4 as a calibration template, acquiring a spherical image through a wide-angle lens shooting calibration template, performing RGB conversion YUV operation on the spherical image to obtain the grayscale image, processing the grayscaleimage to obtain an image containing nine border line angular points; the spherical radius is calculated by using the angular point information through an elliptic formula as a correction coefficient and the spherical image obtained in the lens use process is corrected by using the correction coefficient. The method is simple and convenient to calculate, can directly solve the calibration parameters and solve the corrected image by the embedded device, and meets the requirement of real-time processing.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a wide-angle lens calibration and image correction method. Background technique [0002] At present, most known distortion correction methods for wide-angle lenses are to build experimental devices, collect checkerboard images through the camera, and transmit the images to the computer, and calculate the lens distortion parameters through the host computer software, which is used to restore the circularly distorted fisheye image. Due to the complex algorithm in the existing technology, including polynomial solution and complex matrix operation, the distortion parameters can only be solved by the host computer software, and the calculation of the calibration parameters cannot be directly realized by the embedded device, which cannot meet the needs of real-time processing. Contents of the invention [0003] The invention discloses a wide-angle lens calibration an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80G06T5/00
CPCG06T5/006G06T7/80
Inventor 丛国涛张永锋张晓旭山丹
Owner DALIAN NEUSOFT UNIV OF INFORMATION
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