.. _net.sf.cimg.CImgSharpenInvDiff:

SharpenInvDiff node
===================

.. raw:: html

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*This documentation is for version 2.0 of SharpenInvDiff (net.sf.cimg.CImgSharpenInvDiff).*

Description
-----------

Sharpen selected images by inverse diffusion.

Uses ‘sharpen’ function from the CImg library.

CImg is a free, open-source library distributed under the CeCILL-C (close to the GNU LGPL) or CeCILL (compatible with the GNU GPL) licenses. It can be used in commercial applications (see http://cimg.eu).

Inputs
------

+--------+-------------+----------+
| Input  | Description | Optional |
+========+=============+==========+
| Source |             | No       |
+--------+-------------+----------+
| Mask   |             | Yes      |
+--------+-------------+----------+

Controls
--------

.. tabularcolumns:: |>{\raggedright}p{0.2\columnwidth}|>{\raggedright}p{0.06\columnwidth}|>{\raggedright}p{0.07\columnwidth}|p{0.63\columnwidth}|

.. cssclass:: longtable

+------------------------------+---------+---------+------------------------------------------------------------------------------------------------------------------------------------+
| Parameter / script name      | Type    | Default | Function                                                                                                                           |
+==============================+=========+=========+====================================================================================================================================+
| Amplitude / ``amplitude``    | Double  | 0.2     | Standard deviation of the spatial kernel, in pixel units (>=0). Details smaller than this size are filtered out.                   |
+------------------------------+---------+---------+------------------------------------------------------------------------------------------------------------------------------------+
| Iterations / ``iterations``  | Integer | 2       | Number of iterations. A reasonable value is 2.                                                                                     |
+------------------------------+---------+---------+------------------------------------------------------------------------------------------------------------------------------------+
| (Un)premult / ``premult``    | Boolean | Off     | Divide the image by the alpha channel before processing, and re-multiply it afterwards. Use if the input images are premultiplied. |
+------------------------------+---------+---------+------------------------------------------------------------------------------------------------------------------------------------+
| Invert Mask / ``maskInvert`` | Boolean | Off     | When checked, the effect is fully applied where the mask is 0.                                                                     |
+------------------------------+---------+---------+------------------------------------------------------------------------------------------------------------------------------------+
| Mix / ``mix``                | Double  | 1       | Mix factor between the original and the transformed image.                                                                         |
+------------------------------+---------+---------+------------------------------------------------------------------------------------------------------------------------------------+

.. |pluginIcon| image:: net.sf.cimg.CImgSharpenInvDiff.png
   :width: 10.0%