Automatic Lens distortion estimation for an Active Camera
نویسنده
چکیده
This paper proposes a new algorithm for estimating lens distortion for a pantilt-zoom camera. No calibration pattern is needed: detection of a single feature point at different camera configurations allows the generation of a virtual calibration pattern which is composed of points that, in an undistorted image, are ensured to lie on straight lines. An iterative algorithm estimates lens distortion by minimizing a non-straightness error metric solving two linear subproblems. Experiments on synthetic and real images show the validity of the proposed method.
منابع مشابه
Lens Correction and Gamma Correction
Recently, the necessity of camera in vehicle industry is increasing now as increasing the smart car needs. Almost smart car concepts are implemented by using the camera system based on image processing technology. Actually, the rear view camera for parking assistance system, the forward view camera for lane departure warning and forward collision warning system, and multi-view camera for vehicl...
متن کاملAutomatic Camera Calibration Applied to Medical Endoscopy
We present a calibration algorithm for cameras with lens distortion, that uses a single image of a planar chessboard pattern acquired in general position. The radial distortion is modeled using the first order division model, and the method provides a closed form estimation of the intrinsic parameters and distortion coefficient. The experimental evaluation shows that the calibration accuracy is...
متن کاملEstimation of Interior Orientation Parameters from Constraints on Line Measurements in a Single Image
In this paper a method is presented for the estimation of interior orientation parameters and lens distortion using measurements of lines in a single image and constraints derived from a priori information on the orientation of the related object lines. The interior orientation parameters consist of the location of the principle point and the focal length. Radial lens distortion is modeled with...
متن کاملRobust Radial Distortion from a Single Image
Many computer vision algorithms rely on the assumption of the pinhole camera model, but lens distortion with off-the-shelf cameras is significant enough to violate this assumption. Many methods for radial distortion estimation have been proposed, but they all have limitations. Robust automatic radial distortion estimation from a single natural image would be extremely useful for some applicatio...
متن کاملAlgebraic Lens Distortion Model Estimation
A very important property of the usual pinhole model for camera projection is that 3D lines in the scene are projected to 2D lines. Unfortunately, wide-angle lenses (specially low-cost lenses) may introduce a strong barrel distortion, which makes the usual pinhole model fail. Lens distortion models try to correct such distortion. In reference 1., we propose an algebraic approach to the estimati...
متن کامل