CompassAngleImg
DESCRIPTION
Computes the directional gradient of an image in the direction given
by the Angle parameter. Directions are compass headings, with North
being 0 degrees and proceeding clockwise. The gradient is computed
using a square kernel whose edge length is governed by the Kernel Size
parameter. The Bias parameter adds a constant amount to the output
gradient array. This directional gradient computation is described in:
Digital Image Processing, Gonzales, R.C., Wintz, P.,
Addison Wesley, Second Edition, 1987, pp 176--179.
INPUTS
Port: Img In
Type: Lattice
Constraints: 1..3-D
Source image.
WIDGETS
Port: Angle
Type: Dial
Angle of rotation.
Port: Bias
Type: Slider
Additive bias.
Port: Kernel Size
Type: Slider
One side of the square kernel.
OUTPUTS
Port: Img Out
Type: Lattice
Constraints: 1..3-D
Directional gradient image.
KNOWN PROBLEMS
SEE ALSO
CompassDirImg,
CompassImg,
Gradient.
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© The Numerical Algorithms Group Ltd, Oxford UK. 2000