Single image fisheye camera calibration method based on low rank characteristic recovery

A single image, fisheye camera technology, applied in image analysis, image data processing, instruments, etc., can solve problems such as inability to extract, time-consuming camera calibration, and restriction of camera calibration accuracy, and achieve the effect of overcoming manpower

Inactive Publication Date: 2013-08-28
ZHEJIANG UNIV
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Problems solved by technology

If the method of automatically extracting feature points and then matching the feature points for constraint is heavily dependent on the accuracy of feature point extraction and feature point matching, and the automatically extracted feature points usually cannot extract all the feature points required for calibration, which restricts camera calibration accuracy
Another method is to manually select the corresponding points in multiple images, but this requires the operator to be very careful and careful, so it makes camera calibration a very time-consuming and laborious work

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  • Single image fisheye camera calibration method based on low rank characteristic recovery
  • Single image fisheye camera calibration method based on low rank characteristic recovery
  • Single image fisheye camera calibration method based on low rank characteristic recovery

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experiment example

[0078] The experiment uses FUJINON FE185C086HA-1 fisheye lens to conduct two sets of experiments. The first set shoots the indoor calibration board, and the second set shoots the regular ceiling outside. The two groups of experiments collected 10 images of 512×512 respectively. Since the camera calibration has no true value, the mean and standard deviation of all the results of the single image calibration using this method are given. At the same time, in order to illustrate the effectiveness of this method, the calibration toolbox based on the calibration board is selected (Reference 3: C .Mei and P.Rives, in Proceedings of IEEE International Conference on Robotics and Automation (2007), pp.3945{3950) are compared with the calibration results of this method, and the calibration toolbox needs to input multiple calibration plates at the same time The corner points of the figure, and the size of the grid in the calibration plate needs to be known.

[0079] Table 1 shows the cal...

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Abstract

The invention discloses a single image fisheye camera calibration method based on low rank characteristic recovery. An image with low rank textures is regarded as a matrix, based on an optimizing method of a minimum matrix rank, a low rank image is recovered, exchange is conducted between an original image and the low rank image, and parameters of a fisheye camera is contained in the exchange. The single image fisheye camera calibration method based on the low rank characteristic recovery overcomes the defect that in a traditional method, the fact that angular points are marked manually consumes a large amount of manpower, meanwhile, only a single image is needed, a calibration field does not need to be arranged, and under the premise that certain robustness is ensured, the advantages of being convenient to operate and fast are achieved.

Description

technical field [0001] The invention relates to a camera calibration method, in particular to a single image fisheye camera calibration method based on low-rank texture restoration. Background technique [0002] Camera calibration is the most basic problem in computer vision and surveying and mapping. Only after camera calibration can the pixels on the image be correctly mapped to the three-dimensional space, or the points on the three-dimensional space can be correctly mapped to the image. Therefore, in the field of computer vision, as long as the application of 3D restoration is involved, camera calibration parameters are required, and the accuracy of camera calibration also determines the accuracy of these applications to a large extent. For decades, the camera calibration problem has always been a hot topic, and scholars have proposed many camera calibration methods. [0003] At present, the fisheye camera calibration methods for a single image almost all rely on findin...

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Application Information

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IPC IPC(8): G06T7/00
Inventor赖百胜林颖龚小谨
OwnerZHEJIANG UNIV