New constraints for underwater stereo calibration

2015 ◽  
Author(s):  
Tim Dolereit ◽  
Uwe Freiherr von Lukas ◽  
Arjan Kuijper
Keyword(s):  
Stereo Calibration

Research on Ranging Method Based on Binocular Stereo Vision

2014 ◽  
Vol 945-949 ◽  
pp. 2075-2081 ◽  
Author(s):  
Xue Zhi Lv ◽  
Mei Ting Wang ◽  
Yong Feng Qi ◽  
Xue Mei Zhao ◽  
Hao Dong
Keyword(s):  
Camera Calibration ◽  
Stereo Vision ◽  
Experimental Platform ◽  
Binocular Stereo Vision ◽  
Parallel Arrangement ◽  
Binocular Stereo ◽  
Contour Boundary ◽  
Measurement Object ◽  
Stereo Calibration ◽  
Left And Right

Binocular stereo vision ranging method taking contour boundary center of measurement object as matching features was investigated. And experimental platform for binocular stereo vision ranging system was built up. The stereo vision ranging system comprised four modules: camera calibration, stereo calibration, stereo rectification and features extraction. Firstly, the intrinsic parameters of single camera were obtained by camera calibration and relative pose of two cameras was obtained by stereo calibration. Then the left and right images were rectified into a frontal parallel arrangement by Bouguet’s method. The edge pixels of contours were detected by image processing. Then the disparity and the distance was calculated taking contour center as matching features. Finally, measurement error analysis was performed to verify the proposed method with good practicability.

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.

scholarly journals Calibration of a Stereo Radiation Detection Camera Using Planar Homography

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Seung-Hae Baek ◽  
Pathum Rathnayaka ◽  
Soon-Yong Park
Keyword(s):  
Visual Information ◽  
Radiation Detection ◽  
Research Problem ◽  
Distance Measurements ◽  
Calibration Algorithm ◽  
Calibration Pattern ◽  
Gamma Sources ◽  
Stereo Calibration ◽  
Geometric Relationship ◽  
Homography Transformation

This paper proposes a calibration technique of a stereo gamma detection camera. Calibration of the internal and external parameters of a stereo vision camera is a well-known research problem in the computer vision society. However, few or no stereo calibration has been investigated in the radiation measurement research. Since no visual information can be obtained from a stereo radiation camera, it is impossible to use a general stereo calibration algorithm directly. In this paper, we develop a hybrid-type stereo system which is equipped with both radiation and vision cameras. To calibrate the stereo radiation cameras, stereo images of a calibration pattern captured from the vision cameras are transformed in the view of the radiation cameras. The homography transformation is calibrated based on the geometric relationship between visual and radiation camera coordinates. The accuracy of the stereo parameters of the radiation camera is analyzed by distance measurements to both visual light and gamma sources. The experimental results show that the measurement error is about 3%.

scholarly journals Stereo calibration from rigid motions

2000 ◽  
Vol 22 (12) ◽  
pp. 1446-1452 ◽  
Author(s):  
R. Horaud ◽  
G. Csurka ◽  
D. Demirdijian
Keyword(s):  
Stereo Calibration ◽  
Rigid Motions

scholarly journals Stereo calibration with absolute phase target

2019 ◽  
Vol 27 (16) ◽  
pp. 22254 ◽  
Author(s):  
Yuwei Wang ◽  
Lu Liu ◽  
Bolin Cai ◽  
Keyi Wang ◽  
Xiangcheng Chen ◽  
...  
Keyword(s):  
Absolute Phase ◽  
Stereo Calibration
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