finding the grid

[imago.git] / filter.py

diff --git a/filter.py b/filter.py
index c378f76..c350ef5 100644 (file)
--- a/filter.py
+++ b/filter.py
@@ -1,9 +1,12 @@
 from PIL import Image
+from commons import clear
 
-def filter(image):
+def edge_detection(image):
     image_l = image.load()
     new_image = Image.new('L', image.size)
     new_image_l = new_image.load()
+    clear()
+    print "edge detection"
     for x in range(2, image.size[0] - 2):
         for y in range(2, image.size[1] - 2):
             pix = sum([sum([image_l[a, b] for b in range(y - 2, y + 3)]) for a in range(x - 2, x + 3)]) - (25 * image_l[x, y])
@@ -13,3 +16,18 @@ def filter(image):
                 pix = 0 
             new_image_l[x, y] = pix
     return new_image
+
+def high_pass(image, high_pass):
+    image_l = image.load()
+    new_image = Image.new('L', image.size)
+    new_image_l = new_image.load()
+    clear()
+    print "high pass filter"
+    for x in xrange(image.size[0]):
+        for y in xrange(image.size[1]):
+            if image_l[x, y] < high_pass:
+                new_image_l[x, y] = 0
+            else:
+                new_image_l[x, y] = image_l[x, y]
+
+    return new_image