.. _gradientmagnitude:

gradientmagnitude
*****************


**Syntax:** :code:`gradientmagnitude(input image, output image, spatial sigma, gamma)`

Calculates norm of Gaussian gradient of image. The output image can be the same than the input image.

This command can be used in the distributed processing mode. Use :ref:`distribute` command to change processing mode from local to distributed.

Arguments
---------

input image [input]
~~~~~~~~~~~~~~~~~~~

**Data type:** uint8 image, uint16 image, uint32 image, uint64 image, int8 image, int16 image, int32 image, int64 image, float32 image

Input image.

output image [output]
~~~~~~~~~~~~~~~~~~~~~

**Data type:** float32 image

Output image.

spatial sigma [input]
~~~~~~~~~~~~~~~~~~~~~

**Data type:** real

**Default value:** 1

Standard deviation of Gaussian derivative kernel.

gamma [input]
~~~~~~~~~~~~~

**Data type:** real

**Default value:** 0

Scale-space scaling exponent. Set to zero to disable scaling.