The original image.
Result of scaling ben1.
Result of Gaussian smoothing ben2 with standard
deviation 1.0 (5×5 kernel).
Result of Gaussian smoothing ben2 with standard
deviation 2.0 (9×9 kernel).
Result of Gaussian smoothing ben2 with standard
deviation 4.0 (15×15 kernel).
Result of unsharp masking ben2.