GIMP DR Transformation plug-in


The GIMP plug-in which gives to you tool for operations on DR
of an image. Once plug-in is installed you could find tool
under "Filters/Enhance/DR Transform".


@ Brief params description

 * SPOT SIZE. Spot radius for averaging tone map of an image.
   Generally spot size should be the size of a typical item
   size on an image. At present there is no adaptive detection
   of this value and you can only apply one spot size to whole
   image.

 * CENTER. Attraction value of tone, between 0 (very dark) and
   1 (very bright).
  
 * UNIFORMITY. Value between 0 and 1, sets tone uniformity of an image.
   uniformity defines how close tone value should be to the CENTER
   point. uniformity equals to zero don't change tone at all.

 * EDGES. Preserve overexposed and underexposed pixels from DR
   dramatically conversions. Value lies in range of 0 (no
   preservation) to 1 (maximum preservation).

 * CONTRAST. Local adaptive contrast transformation, value
   could be changed in range of -1 to +1, from less to high
   contrast. Zero value turns off contrast transformations.

 * WIDTH. Factor value for DR width accounting. Zero
   width do not change default DR width, -1 reduce it to
   zero and +1 take all DR range. This value affects on adaptive
   behaviours of some transformations.

 * ASYMMETRY. Asymmetry between darken and lighten areas of an
   image relative to the CENTER point. Value of -1 only reduces
   tone value to the CENTER point and +1 only increases. Zero
   value turns asymmetry off.

These values can be divided into the tone geometry group (SPOT
SIZE, CENTER, UNIFORMITY, ASYMMETRY) and the DR transformation group
(EDGES, CONTRAST, WIDTH). Tone geometry defines how final
image tone map will be matched up with original one. And DR
transformation defines how pixels value (i.e. value of HSV model
at present) will be mapped.


@ Contacts

Found a bug, have a feature requests, suggestions or questions?
Fell free to do it. Project on Source Forge:

   http://sourceforge.net/projects/magie/

and mine contact:

   Ivan Bezdomniy, <bezdomniy@gmail.com>


