darsia.laplace

laplace(img, axis=None, dim=2, h=None, diffusion_coeff=1)

Laplace operator with homogeneous boundary conditions.

Considers image matrix in direction of axis.

Parameters:

imgnp.ndarray

Image array.

axisint

Axis along which the difference is taken.

dimint

Dimension of image array.

hOptional[float]

Grid spacing.

diffusion_coeffnp.ndarray or float

Diffusion coefficient.

Returns:

np.ndarray

Horizontal Laplace image matrix.