Implementation of a wide-angle lens distortion correction algorithm on the cell broadband engine

2009 ◽  
Author(s):  
Konstantis Daloukas ◽  
Christos D. Antonopoulos ◽  
Nikolaos Bellas
Keyword(s):  
Distortion Correction ◽  
Lens Distortion ◽  
Wide Angle ◽  
Correction Algorithm ◽  
Cell Broadband Engine ◽  
Wide Angle Lens

scholarly journals Efficient Lens Distortion Correction for Decoupling in Calibration of Wide Angle Lens Cameras

2013 ◽  
Vol 13 (2) ◽  
pp. 854-863 ◽  
Author(s):  
Carlos Ricolfe-Viala ◽  
Antonio-Jose Sanchez-Salmeron ◽  
Angel Valera
Keyword(s):  
Distortion Correction ◽  
Lens Distortion ◽  
Wide Angle ◽  
Wide Angle Lens

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.

Evaluating the Impact of Wide-Angle Lens Distortion on Learning-based Depth Estimation

2021 ◽  
Author(s):  
Julie Buquet ◽  
Jinsong Zhang ◽  
Patrice Roulet ◽  
Simon Thibault ◽  
Jean-Francois Lalonde
Keyword(s):  
Depth Estimation ◽  
Lens Distortion ◽  
Wide Angle ◽  
Wide Angle Lens ◽  
The Impact

scholarly journals CALIBRATION OF SMARTPHONE’S REAR DUAL CAMERA SYSTEM

2021 ◽  
Vol 47 (4) ◽  
pp. 162-169
Author(s):  
Mohammed Aldelgawy ◽  
Isam Abu-Qasmieh
Keyword(s):  
Lens Distortion ◽  
Stereo Pair ◽  
Calibration Model ◽  
Wide Angle ◽  
Camera System ◽  
Check Points ◽  
Extrinsic Parameters ◽  
Wide Angle Lens ◽  
Chessboard Pattern ◽  
Distortion Parameters

This paper aims to calibrate smartphone’s rear dual camera system which is composed of two lenses, namely; wide-angle lens and telephoto lens. The proposed approach handles large sized images. Calibration was done by capturing 13 photos for a chessboard pattern from different exposure positions. First, photos were captured in dual camera mode. Then, for both wide-angle and telephoto lenses, image coordinates for node points of the chessboard were extracted. Afterwards, intrinsic, extrinsic, and lens distortion parameters for each lens were calculated. In order to enhance the accuracy of the calibration model, a constrained least-squares solution was applied. The applied constraint was that the relative extrinsic parameters of both wide-angle and telephoto lenses were set as constant regardless of the exposure position. Moreover, photos were rectified in order to eliminate the effect of lens distortion. For results evaluation, two oriented photos were chosen to perform a stereo-pair intersection. Then, the node points of the chessboard pattern were used as check points.

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