StickFilter
Related Doc:
package spatial
Create a horizontal stick filter rotated to angle with sigma in the
horizontal direction of horizSigma, sigma in the vertical direction
of vertSigma (which will normally be smaller than horizSigma) and
offset from the horizontal axis, shift.
Create a horizontal stick filter rotated to angle with sigma in the
horizontal direction of horizSigma, sigma in the vertical direction
of vertSigma (which will normally be smaller than horizSigma) and
offset from the horizontal axis, shift.
A Stick filter is a 2-dimensional Gaussian with different sigmas for each dimension. The constructor also allows the stick to be offset radially from the center, in the direction perpendicular to the "long" direction of the kernel, and to be rotated. The size of the kernel is computed automatically.