Image.scalespace#

Image.scalespace(n: int, sigma: int | float = 1) → tuple[list[Any], list[Any], list[float]][source]#

Compute image scalespace sequence

Parameters:

  • n (omt) – number of steps

  • sigma (scalar, optional) – Gaussian filter width, defaults to 1

Returns:

Gaussian and difference of Gaussian sequences, scale factors

Return type:

list of Image, list of Image, list of float

Compute a scalespace image sequence by consecutively smoothing the input image with a Gaussian of width sigma. The difference between consecutive smoothings is the difference of Gaussian which is an approximation to the Laplacian of Gaussian.

Examples:

mona = Image.Read("monalisa.png", dtype="float");
G, L, scales = mona.scalespace(8, sigma=8);

Note

The two image sequences have the same length, the original image is not included in the list of smoothed images.

References:
Seealso:

pyramid smooth Gauss LoG