Thibault Delavallée (OpenERP) has proposed merging 
lp:~openerp-dev/openobject-server/trunk-fix-image-sharpen-tde into 
lp:openobject-server.

Requested reviews:
  OpenERP Core Team (openerp)

For more details, see:
https://code.launchpad.net/~openerp-dev/openobject-server/trunk-fix-image-sharpen-tde/+merge/124183

Fixed image sharpening in tools; this requires an image converted into RGB.
-- 
https://code.launchpad.net/~openerp-dev/openobject-server/trunk-fix-image-sharpen-tde/+merge/124183
Your team OpenERP R&D Team is subscribed to branch 
lp:~openerp-dev/openobject-server/trunk-fix-image-sharpen-tde.
=== modified file 'openerp/tools/image.py'
--- openerp/tools/image.py	2012-09-07 09:49:57 +0000
+++ openerp/tools/image.py	2012-09-13 12:32:25 +0000
@@ -66,8 +66,9 @@
     # check image size: do not create a thumbnail if avoiding smaller images
     if avoid_if_small and image.size[0] <= size[0] and image.size[1] <= size[1]:
         return base64_source
-    # create a thumbnail: will resize and keep ratios
+    # create a thumbnail: will resize and keep ratios, then sharpen for better looking result
     image.thumbnail(size, Image.ANTIALIAS)
+    image.convert('RGB')
     image = image.filter(ImageFilter.SHARPEN)
     # create a transparent image for background
     background = Image.new('RGBA', size, (255, 255, 255, 0))

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