Hi,
According to the video recording (Link, 01:05:34~01:06:49), the slide 34 of Image Formation should be interprated:
1. the projection matrix of a pinhole camera has 11 degree of freedom
According to the video recording (Link, 01:05:34~01:06:49), the slide 34 of Image Formation should be interprated:
1. the projection matrix of a pinhole camera has 11 degree of freedom
2. the 5 internal parameters represent intrinsic property of the camera, including skew, scaling and principal points. These parameters are only related to camera itself and do not depend on the particular 3D scene. This is why they are internal.
3. the 6 external parameters represent the pose of the camera, including rotation and translation. These parameters may change if the camera pose or the chosen world coordinate system changes, but they are not intrinsic properties of the camera.
4. camera calibration can be used to calculate these parameters given the images and algorithm explained in slide 35 and 36.
Therefore, in Question 9, the statement is false because once the camera’s internal parameters are calibrated and they do not change, the camera does not need to be recalibrated for each new 3D scene. For a new scene, one may need to define or estimate the camera pose relative to that scene, but this is not the same as recalibrating the camera’s internal parameters.
Best,
