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Elliptic fisheye image-based distortion correction method

A fisheye image, distortion correction technology, applied in 3D image processing, image data processing, instruments, etc.

Inactive Publication Date: 2012-06-13
JIANGSU PROTRULY VISION TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Traditional fisheye image distortion correction methods are aimed at circular fisheye images, and so far there is no effective method for elliptical fisheye image correction

Method used

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  • Elliptic fisheye image-based distortion correction method
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  • Elliptic fisheye image-based distortion correction method

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Embodiment Construction

[0033] The correction process of the elliptical fisheye image of the present invention is carried out in three steps, as figure 2 As shown, the implementation process is described in detail as follows:

[0034] 1. Establish an elliptical paraboloid model, and establish a fisheye imaging transformation relationship and a transformation relationship from a fisheye image to a perspective image on the elliptical paraboloid model;

[0035] The establishment process of the elliptic paraboloid model is as follows: image 3 As shown, an elliptical paraboloid is set up in the spatial rectangular coordinate system OXYZ, the origin of the spatial rectangular coordinate system is set as O point, and the elliptical paraboloid is symmetrical about the X axis and the Y axis in the spatial rectangular coordinate system, and the elliptical paraboloid The apex of the vertex is on the positive semi-axis of the Z axis, and the opening faces the negative direction of the Z axis in the space Cart...

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Abstract

The invention discloses an elliptic fisheye image-based distortion correction method, which is characterized by comprising the following steps: firstly, establishing an imaging model of an elliptic fisheye image under a coordinate system of a camera by using an elliptic paraboloid; performing approximate calibration on the parameters of the model by using a pixel coordinate system; and finally, performing the distortion correction on the obtained fisheye image by using the established model. The invention provides the elliptic fisheye image-based distortion correction method for a 180-degree viewing angle, which can particularly obtain a fluoroscopic image corrected by the elliptic fisheye image quickly and simply in case of unknown camera parameters.

Description

technical field [0001] The invention relates to a method for correcting fish-eye images, more specifically to a method for correcting distortion of elliptical fish-eye images. Background technique [0002] In the fields of computer vision, virtual reality, robot navigation, and visual monitoring, it is often necessary to obtain images with a wider range of angles. Even wide-angle lenses have various limitations in the use of them. However, fisheye cameras can meet these requirements, and their range of angles of view can be A large or even close to full viewing angle range can effectively meet the needs of the above fields. Therefore, fisheye lenses that can obtain fisheye images with large viewing angles are widely used. [0003] The fisheye image is very different from the perspective image seen in reality. While obtaining a large viewing angle, the obtained fisheye image has a large degree of deformation and distortion, so before using the fisheye image Distortion correc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T15/00
Inventor 刘晓平路强李琳徐刚强郑利平薛峰余烨
Owner JIANGSU PROTRULY VISION TECH GRP CO LTD
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