A generic camera model and calibration method for conventional, wide-angle, and fish-eye lenses

2006 ◽  
Vol 28 (8) ◽  
pp. 1335-1340 ◽  
Author(s):  
J. Kannala ◽  
S.S. Brandt
Keyword(s):  
Calibration Method ◽  
Wide Angle ◽  
Camera Model ◽  
Fish Eye ◽  
Generic Camera

scholarly journals A novel camera calibration method for fish-eye lenses using line features

2014 ◽  
Vol XL-3 ◽  
pp. 327-332
Author(s):  
P. Srestasathiern ◽  
N. Soontranon
Keyword(s):  
A Priori ◽  
Real Data ◽  
Calibration Method ◽  
Conic Section ◽  
Symmetric Model ◽  
Camera Model ◽  
Single View ◽  
Conic Fitting ◽  
Fish Eye ◽  
Calibration Plane

In this paper, a novel method for the fish-eye lens calibration is presented. The method required only a 2D calibration plane containing straight lines i.e., checker board pattern without a priori knowing the poses of camera with respect to the calibration plane. The image of a line obtained from fish-eye lenses is a conic section. The proposed calibration method uses raw edges, which are pixels of the image line segments, in stead of using curves obtained from fitting conic to image edges. Using raw edges is more flexible and reliable than using conic section because the result from conic fitting can be unstable. The camera model used in this work is radially symmetric model i.e., bivariate non-linear function. However, this approach can use other single view point camera models. The geometric constraint used for calibrating the camera is based on the coincidence between point and line on calibration plane. The performance of the proposed calibration algorithm was assessed using simulated and real data.

Fisheye Lens Distortion Calibration Based on the Lens Charactetic Curves

2014 ◽  
Vol 519-520 ◽  
pp. 636-639
Author(s):  
Bao Long Zhang ◽  
Shao Jing Zhang ◽  
Wei Qi Ding ◽  
Hui Shuang Shi
Keyword(s):  
Optical System ◽  
Characteristic Curve ◽  
Calibration Method ◽  
Lens Distortion ◽  
Wide Angle ◽  
Forming Process ◽  
Fisheye Lens ◽  
Large Scope ◽  
Wide Angle Lens ◽  
Barrel Distortion

The fisheye lens is a kind of ultra wide angle lens, which can produce a big super-wide-angle lens distortion. In order to cover a large scope of light, barrel distortion is artificially added to the optical system. However, in some cases this distortion is not allowed, then it requires calibrations of those distortions. Most of the traditional distortion calibration method uses target plane calibration to do it. This paper discusses the way of design fisheye lens, through which we can know the forming process of distortion clearly. Based on this paper, a simple and effective calibration method can be understood. Different from common camera calibration method, the proposed calibration method can avoid the error occurring in the process of calibrating test, that directly use the lens’ characteristic curve. Through multiple sets of experimental verifications, this method is effective and feasible.

scholarly journals Partial Maxwell fish-eye lens inspired by Gutman lens and Eaton lens for wide-angle beam scanning

2021 ◽  
Author(s):  
Yong Liu ◽  
Hongda Lu ◽  
Zhipeng Liu ◽  
Yanbo Zhang ◽  
Ke Pang
Keyword(s):  
Eye Lens ◽  
Wide Angle ◽  
Beam Scanning ◽  
Fish Eye

Based on the Experimental Platform of Litchi Picking Vision Calibration

2013 ◽  
Vol 462-463 ◽  
pp. 978-983
Author(s):  
Jiang Zhou Zhang ◽  
Jian Feng Zhang ◽  
Ji Zhong Deng
Keyword(s):  
Binocular Vision ◽  
Calibration Method ◽  
Feature Points ◽  
Camera Model ◽  
Reference Coordinate System ◽  
Experimental Platform ◽  
Hardware System ◽  
Mechanical Hand ◽  
Planar Pattern ◽  
Selection Of

This paper constructs the picking mechanical hand binocular vision hardware system. Using an internal and external parameters calibration method of separation. In the calibration process, with calibration planar pattern translatory manner, appropriate for extracting feature points in the calibration template, through experiment and calculation to obtain the accurate parameters of camera model; external parameters calibration is a reasonable selection of reference coordinate system, through experimental analysis to obtain the two cameras outside parameter model.

Binocular Stereo Vision Calibration System Implementation of Grid Strain Measurement in Sheet Forming

2013 ◽  
Vol 397-400 ◽  
pp. 1547-1551
Author(s):  
Hui Yu Xiang ◽  
Bao An Han ◽  
Zhe Li ◽  
Jia Jun Huang
Keyword(s):  
Stereo Vision ◽  
Strain Measurement ◽  
Calibration Method ◽  
Sheet Forming ◽  
Calibration System ◽  
Camera Model ◽  
Distortion Factor ◽  
Binocular Stereo Vision ◽  
Binocular Stereo ◽  
Stereo Calibration

For the research of camera calibration in the system of grid strain measurement in sheet forming, the pinhole camera model, the nonlinear model of the camera and the binocular stereo model are analyzed, drawing a binocular stereo calibration method based on HALCON, which detailedly describes the calibration principle and specific calibration process. A binocular stereo vision calibration system based on VC6.0 is established, by which the influence on camera focus, distortion factor and principle points from the number of calibration images is verified by experiments.

Sign in / Sign up

Export Citation Format

Share Document