Calibration method for fisheye panorama camera in natural environment
A panoramic camera and calibration method technology, applied in the field of fisheye panoramic camera calibration in the natural environment, can solve the problems of not being applicable to random and arbitrary application environments, not applicable to fisheye images, etc. Effect
Active Publication Date: 2017-06-20
成都易瞳科技有限公司
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However, this method is not suitable for fisheye images. Fisheye lens imaging images with large distortion can only be calibrated in specially arranged scenes, and cannot be applied to random and arbitrary application environments.
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[0039] The present invention is specifically described below by way of embodiment, and present embodiment is only used to further illustrate the present invention, but can not be interpreted as the restriction to protection scope of the present invention, some non-compliances that those skilled in the art make according to the content of the present invention above-mentioned Essential improvements and adjustments also belong to the protection scope of the present invention.
[0040] In order to realize the calibration of the fisheye panoramic camera in the natural environment, the present invention does not need to build a special scene, and establishes a theoretical parameter model through the obtained double fisheye image, extracts the feature points of the fisheye image, uses the optimization algorithm to calculate the model parameters, and brings the parameters into the The model is iteratively screened to obtain the mapping relationship between each fisheye image and the s...
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The invention discloses a calibration method for a fisheye panorama camera in a natural environment. The method comprises the steps that dual fisheye images are acquired; a theoretical parameters model is established; fish eye image feature points are extracted; an optimization algorithm is used to calculate model parameters; and the parameters are substituted into the model for iterative screening to acquire the mapping relation between the fisheye images and the sphere surface, and a sphere surface image is displayed. According to the invention, the image feature point extraction method can be applied to the large distorted fisheye images and can further guarantee the accuracy of the extracted feature points. The invention further proposes the iterative model for screening the feature points. The method provided by the invention can be used to accurately calibrate the panoramic camera in the natural and random environment. Constructing a special scene to acquire the mapping relation is not needed. According to the invention, an autonomous method is used to autonomously acquire the mapping relation between each fisheye image and the sphere surface; the use threshold of the panoramic camera is reduced; and the use range of the panoramic camera is expanded.
Description
technical field [0001] The invention belongs to the technical field of computer image processing applications, and relates to a method for calibrating a fisheye panoramic camera in a natural environment. Background technique [0002] A panoramic camera generally consists of two or more optical imaging systems, and then maps the collected images onto the surface of a sphere through mathematical calculations. This process involves the mapping relationship between each image and the surface of the sphere, and the purpose of calibration is to obtain the corresponding mapping relationship between the images, so that the obtained images can be correctly displayed on the display device. [0003] Generally, existing calibration methods can only calibrate images with little or no distortion. The method is to calculate the mapping relationship of each image by finding the corresponding feature points of the redundant parts between the images. However, this method is not suitable for ...
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Inventor 张恩泽赖文杰胡志发成茵余黎
Owner 成都易瞳科技有限公司