darsia.backward_diff

backward_diff(img, axis, dim=2, h=None)

Backward difference of image matrix in direction of axis.

Parameters:

imgnp.ndarray

Image array in single-color space.

axisint

Axis along which the difference is taken.

dimint

Dimension of image array.

hOptional[float]

Grid spacing.

Returns:

np.ndarray

Backward difference image matrix.