Compute the gradient magnitude and direction in degrees for an image.
These are computed from the gx and xy gradients using
imgradientxy. The first input img is a gray scale image to
compute the edges on. The second input method controls the method
used to calculate the gradients. Alternatively the first input gx
can be the x gradient and the second input gy can be the y gradient.
The first output gradMag returns the magnitude of the gradient. The second output gradDir returns the direction in degrees.
The method input argument must be a string specifying one of the
methods supported by imgradientxy.
See also: edge, imgradientxy.
Package: image