Determining the Camera Calibration Matrix: Unraveling the Process from Hardware Specifications
1. What are camera models?
The most basic camera model is the pinhole camera model, which explains the process of projecting a 3D point from camera space onto a 2D image space.
A calibration matrix can be used to articulate the relationship between a 3D spatial point and its corresponding 2D image point.
The camera calibration matrix (also called camera intrinsic matrix) can become increasingly intricate, potentially incorporating factors such as skew parameters, separate focal lengths, and offsets for the principal point in both the x-axis and y-axis.
2. How can we calculate the camera’s calibration matrix if we have limited knowledge of the hardware information?
If you possess limited knowledge about the camera’s hardware details such as sensor size and camera focal length, employing computer vision software packages like OpenCV becomes essential for the automated estimation of the camera’s intrinsic matrix. The fundamental concept involves using multiple real-world 3D and 2D measurements to compute the mathematical…