Equidistant Fish-Eye Calibration and Rectification by Vanishing Point Extraction

Hughes, Ciáran; Denny, Patrick; Glavin, Martin; Jones, Edward

doi:10.1109/tpami.2010.159

Cited by 82 publications

(75 citation statements)

References 19 publications

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“…It seems that this approach may be used for any radially symmetric distortion model. In [240], Hughes et al extended the previous approach by estimating another intrinsic parameter besides the distortion center, namely the proportionality factor k of the equiangular camera model (cf. Section 3.1.7).…”

Section: Calibration Grids At Infinity -Collimators Stellar Calibratmentioning

confidence: 99%

“…Many other plumb-line approaches were proposed for the classical as well as other distortion models, e.g., [127,240,241,272,337,408,427,485,503,510,520,521,553,575]. Ricolfe-Viala and Sánchez-Salmerón combined a plumb-line constraint with a constraint expressing the invariance of the cross-ratio of collinear points, to calibrate a classical distortion model from images of planar grids [428].…”

Section: Lines -The Plumb-line Approachmentioning

confidence: 99%

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Camera Models and Fundamental Concepts Used in Geometric Computer Vision

Sturm

2010

FNT in Computer Graphics and Vision

157

122

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A printed and bound version is available at a special discount price of US35 from Now Publishers. This can be obtained by entering the promotional code CGV006023 on https://www.nowpublishers.com/bookorder.aspx?doi=0600000023&product=CGVInternational audienceThis survey is mainly motivated by the increased availability and use of panoramic image acquisition devices, in computer vision and various of its applications. Different technologies and different computational models thereof exist and algorithms and theoretical studies for geometric computer vision ("structure-from-motion") are often re-developed without highlighting common underlying principles. One of the goals of this survey is to give an overview of image acquisition methods used in computer vision and especially, of the vast number of camera models that have been proposed and investigated over the years, where we try to point out similarities between different models. Results on epipolar and multi-view geometry for different camera models are reviewed as well as various calibration and self-calibration approaches, with an emphasis on non-perspective cameras. We finally describe what we consider are fundamental building blocks for geometric computer vision or structure-from-motion: epipolar geometry, pose and motion estimation, 3D scene modeling, and bundle adjustment. The main goal here is to highlight the main principles of these, which are independent of specific camera models

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Section: Calibration Grids At Infinity -Collimators Stellar Calibratmentioning

confidence: 99%

Section: Lines -The Plumb-line Approachmentioning

confidence: 99%

Camera Models and Fundamental Concepts Used in Geometric Computer Vision

Sturm

2010

FNT in Computer Graphics and Vision

157

122

View full text Add to dashboard Cite

show abstract

“…In fisheye cameras, following process is performed by the help of this common mapping function. The other mapping functions are stereographic, equisolid and orthogonal [80]. Eq.…”

Section: Smartphones From An Applied Research Perspective 36mentioning

confidence: 99%

The Geometry and Usage of the Supplementary Fisheye Lenses in Smartphones

Sahin¹

2017

Smartphones From an Applied Research Perspective

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Nowadays, mobile phones are more than a device that can only satisfy the communication need between people. Since fisheye lenses integrated with mobile phones are lightweight and easy to use, they are advantageous. In addition to this advantage, it is experimented whether fisheye lens and mobile phone combination can be used in a photogrammetric way, and if so, what will be the result. Fisheye lens equipment used with mobile phones was tested in this study. For this, standard calibration of 'Olloclip 3 in one' fisheye lens used with iPhone 4S mobile phone and 'Nikon FC-E9' fisheye lens used with Nikon Coolpix8700 are compared based on equidistant model. This experimental study shows that Olloclip 3 in one fisheye lens developed for mobile phones has at least the similar characteristics with classic fisheye lenses. The dimensions of fisheye lenses used with smart phones are getting smaller and the prices are reducing. Moreover, as verified in this study, the accuracy of fisheye lenses used in smartphones is better than conventional fisheye lenses. The use of smartphones with fisheye lenses will give the possibility of practical applications to ordinary users in the near future.

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“…Lee (Lee et al, 2011) introduced another method for wide-angle distortion correction with hough transform and gradient estimation. There are also other methods,such as virtual grid (Arfaoui and Thibault, 2013), parabolic perspective projection (Zhang, 2012), vanishing point (Hughes et al, 2010) and so on.…”

Section: Introductionmentioning

confidence: 99%

Critical Assessment of Correction Methods for Fisheye Lens Distortion

Liu

Tian

Huang

2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:A fisheye lens is widely used to create a wide panoramic or hemispherical image. It is an ultra wide-angle lens that produces strong visual distortion. The distortion modeling and estimation of the fisheye lens are the crucial step for fisheye lens calibration and image rectification in computer vision and close-range photography. There are two kinds of distortion: radial and tangential distortion. Radial distortion is large for fisheye imaging and critical for the subsequent image processing. Although many researchers have developed calibration algorithms of radial distortion of fisheye lens, quantitative evaluation of the correction performance has remained a challenge. This is the first paper that intuitively and objectively evaluates the performance of five different calibration algorithms. Upto-date research on fisheye lens calibration is comprehensively reviewed to identify the research need. To differentiate their performance in terms of precision and ease-using, five methods are then tested using a diverse set of actual images of the checkerboard that are taken at Wuhan University, China under varying lighting conditions, shadows, and shooting angles. The method of rational function model, which was generally used for wide-angle lens correction, outperforms the other methods. However, the one parameter division model is easy for practical use without compromising too much the precision. The reason is that it depends on the linear structure in the image and requires no preceding calibration. It is a tradeoff between correction precision and ease-using. By critically assessing the strengths and limitations of the existing algorithms, the paper provides valuable insight and guideline for future practice and algorithm development that are important for fisheye lens calibration. It is promising for the optimal design of lens correction models that are suitable for the millions of portable imaging devices.

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Equidistant Fish-Eye Calibration and Rectification by Vanishing Point Extraction

Cited by 82 publications

References 19 publications

Camera Models and Fundamental Concepts Used in Geometric Computer Vision

Camera Models and Fundamental Concepts Used in Geometric Computer Vision

The Geometry and Usage of the Supplementary Fisheye Lenses in Smartphones

Critical Assessment of Correction Methods for Fisheye Lens Distortion

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