X-Git-Url: http://git.tomasm.cz/imago.git/blobdiff_plain/438a5577c31f4ab99d4d156417f5484fb9b9ad54..ad06aed1192f4b21ae009c593e8bf2ca5ed14fad:/filters.py?ds=inline

diff --git a/filters.py b/filters.py
index ce955a4..825834f 100644
--- a/filters.py
+++ b/filters.py
@@ -1,17 +1,20 @@
-from PIL import Image
+from PIL import Image, ImageFilter
 
-def edge_detection(image, size):
+def edge_detection(image):
+    image = image.filter(ImageFilter.GaussianBlur())
+    # GaussianBlur is undocumented class, it might not work in future versions
+    # of PIL
     image_l = image.load()
     new_image = Image.new('L', image.size)
     new_image_l = new_image.load()
     
-    for x in xrange(size, image.size[0] - size):
-        for y in xrange(size, image.size[1] - size):
+    for x in xrange(2, image.size[0] - 2):
+        for y in xrange(2, image.size[1] - 2):
             pix = (sum([sum([
                 image_l[a, b] 
-                    for b in range(y - size, y + size + 1)]) 
-                    for a in range(x - size, x + size + 1)])
-                - (((2 * size + 1) ** 2)  * image_l[x, y]))
+                    for b in range(y - 2, y + 3)]) 
+                    for a in range(x - 2, x + 3)])
+                - (25  * image_l[x, y]))
             if pix > 255:
                 pix = 255
             if pix < 0: