Brown-Conrady model
Definition
The standard parametric model for camera lens distortion, using radial coefficients k1, k2, k3 and tangential coefficients p1, p2. Camera calibration tools (OpenCV, Matlab Camera Calibrator, photogrammetric software) fit these coefficients from images of a known calibration target.
Related terms
- Colour filter array (CFA)
- A mosaic of spectrally selective filters placed over a camera sensor so that each photosite measures only one colour channel. The standard...
- Demosaicing
- The algorithm used to interpolate full-colour pixel values from the single-channel raw sensor data. Common methods include bilinear interpolation, gradient-based algorithms (AHD,...
- Device-class identification
- Establishing that an image was captured by one of a set of cameras sharing the same sensor architecture and firmware, rather than...
- Frequency-domain CFA spectrum
- When a demosaiced image is transformed into the frequency domain (using a 2D DFT), the CFA interpolation introduces periodic peaks at spatial...
- Radial distortion
- A geometric lens aberration in which magnification changes with distance from the optical axis. Barrel distortion (negative radial coefficient k1) bows straight...
Explained in
- Lens Distortion, CFA Pattern and Demosaicing FingerprintsThe standard parametric model for camera lens distortion, using radial coefficients k1, k2, k3 and tangential coefficients p1, p2. Camera calibration tools (Op...