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

[Gilles Caulier]

https://bugs.kde.org/show_bug.cgi?id=148540


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

           What    |Removed                     |Added
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  Attachment #42226|0                           |1
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--- 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

Julien,

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

Chrominance noise, grain size 1 :
http://farm5.static.flickr.com/4071/4460203462_56ef6e186c_o.png
Chrominance noise, grain size 2 :
http://farm3.static.flickr.com/2801/4459423743_e9727d7954_o.png
Chrominance noise, grain size 4 :
http://farm3.static.flickr.com/2682/4459423911_9e6219b03e_o.png
Chrominance noise, grain size 6 :
http://farm5.static.flickr.com/4010/4460203996_80660b83d7_o.png


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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