Image Splicing Detection Using Inherent Lens Radial Distortion

Model-free Radial Distortion Correction of Wide Angle Lenses using Vanishing Points

In this paper, we proposed a new model-free method for correcting the radial distortion of a strong wide-angle lens using vanishing points in a single image. The key idea is to use a 3D concave calibration rig with three planar patterns aligned orthogonally with each other, so that the parallelism of the line patterns, orthogonality and concavity of the rig enable us to cope with the distortion...

A Parameter-free Radial Distortion Correction of Wide Angle Lenses using Distorted Vanishing Points

In this paper, we proposed a new stratified method for correcting the radial distortion of a strong wide-angle lens using a single image. The key idea is to use a 3D concave calibration rig with three planar patterns aligned orthogonally with each other. The parallelism of the line patterns, orthogonality and concavity of the rig enable us to deal with the distortion of the entire image that is...

A Novel Method for Measuring, Regardless of Image Distortion and Lens Varying Specifications in Endoscopic Treatment of Vesicoureteral Reflux

Blind Detection and Compensation of Camera Lens Geometric Distortions

This paper presents a blind detection and compensation technique for camera lens geometric distortions. The lens distortion introduces higher-order correlations in the frequency domain and in turn it can be detected using higher-order spectral analysis tools without assuming any specific calibration target. The existing blind lens distortion removal method only considered a single-coefficient r...

Correcting Radial Distortion of Cameras with Wide Angle Lens Using Point Correspondences

Most algorithms in 3-D Computer Vision rely on the pinhole camera model because of its simplicity, whereas video optics, especially wide-angle lens, generates a lot of non-linear distortion. In some applications, for instance in stereo vision systems and robotic systems, this distortion can be critical. Camera calibration consists of finding the mapping between the 3-D space and the camera plan...