Howtosignalprocessing
- Why checkerboard is used for camera calibration?
- What is camera calibration matrix?
- How many points are needed for camera calibration?
Why checkerboard is used for camera calibration?
Camera calibration is a key step in three-dimensional (3-D) reconstruction, and its accuracy directly affects the final effect and quality of the 3-D models. In computer vision, the checkerboard pattern is widely used for camera calibration because it is easily produced and enables high accuracy.
What is camera calibration matrix?
The camera matrix is a 4-by-3 matrix that represents the pinhole camera specifications. The image plane is mapped into the image plane by this matrix, which maps the 3-D world scene. Using the extrinsic and intrinsic parameters, the calibration algorithm computes the camera matrix.
How many points are needed for camera calibration?
The traditional way to calibrate the camera is to take images of a known calibration grid. Six points are needed to obtain 12 equations.
