tfg.rendering.camera.perspective.intrinsics_from_matrix

Extracts intrinsic parameters from a calibration matrix.

tfg.rendering.camera.perspective.intrinsics_from_matrix(
    matrix, name=None
)

Extracts the focal length $(f_x, f_y)$, the principal point $(c_x, c_y)$ and the skew_coefficient(\sc\) from a camera calibration matrix

$$ \mathbf{C} = \begin{bmatrix} f_x & sc & c_x \\ 0 & f_y & c_y \\ 0 & 0 & 1 \\ \end{bmatrix}. $$

In the following, A1 to An are optional batch dimensions.

Args
`matrix`	A tensor of shape `[A1, ..., An, 3, 3]`, where the last two dimensions represent a camera calibration matrix.
`name`	A name for this op that defaults to "perspective_intrinsics_from_matrix".

Returns
Tuple of three tensors, the first two of shape `[A1, ..., An, 2]` and the third of shape `[A1, ..., An, 1]`. The first tensor represents the focal length, and the second one the principle point and the third one represents the skew coefficient.

Raises
`ValueError`	If the shape of `matrix` is not supported.

Args