[Digikam-devel] [Bug 148540] Improvements of adding noise tool

Gilles Caulier caulier.gilles at gmail.com
Wed Mar 24 15:15:14 GMT 2010


Gilles Caulier <caulier.gilles at gmail.com> changed:

           What    |Removed                     |Added
  Attachment #42226|0                           |1
        is obsolete|                            |

--- Comment #56 from Gilles Caulier <caulier gilles gmail com>  2010-03-24 16:15:09 ---
Created an attachment (id=42235)
 --> (http://bugs.kde.org/attachment.cgi?id=42235)
New version of patch for grain size support


This time, Grain Size is randomized using Guaussian noise generator for each
matrix pixels. mlead matrix adjustement is computed using uniform noise

Chrominance noise, grain size 1 :
Chrominance noise, grain size 2 :
Chrominance noise, grain size 4 :
Chrominance noise, grain size 6 :

The results are not too bad. Certainly we need to adjust better the rejection
of grain size value into the gaussian noise generator (see lines 138 and 149).
Please test in all cases with your image collection.

Gilles Caulier

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