diff --git a/pixelocr/page.py b/pixelocr/page.py
index b48a8fa..798187e 100644
--- a/pixelocr/page.py
+++ b/pixelocr/page.py
@@ -85,6 +85,24 @@ class PageObject(object):
 
         return self.image.fits(left, top, right, bottom)
 
+    def _optical_correction(self, other):
+        image1 = self.image
+        image2 = other.image
+        base = min(image1.top, image2.top)
+        height = max(image1.bottom, image2.bottom) - base
+        bitmap1 = np.hstack([np.ones((image1.height, 1)), image1.bitmap])
+        bitmap2 = np.hstack([image2.bitmap, np.ones((image2.height, 1))])
+
+        margin1 = np.zeros(height, np.int)
+        margin1.fill(image1.width)
+        margin2 = np.zeros(height, np.int)
+        margin2.fill(image2.width)
+
+        margin1[image1.top - base: image1.bottom - base] = np.fliplr(bitmap1).argmax(axis=1)
+        margin2[image2.top - base: image2.bottom - base] = bitmap2.argmax(axis=1)
+        margins = margin1 + margin2
+        return margins.min()
+
 
 class Page(PageObject):
     def __iter__(self):
@@ -181,24 +199,6 @@ class Glyph(PageObject):
         """Return True if the glyph is definitely not diacritic."""
         return self.height >= self.MIN_BODY_HEIGHT
 
-    def _optical_correction(self, other):
-        glyph1 = self
-        glyph2 = other
-        base = min(glyph1.top, glyph2.top)
-        height = max(glyph1.bottom, glyph2.bottom) - base
-        bitmap1 = np.hstack([np.ones((glyph1.height, 1)), glyph1.image.bitmap])
-        bitmap2 = np.hstack([glyph2.image.bitmap, np.ones((glyph2.height, 1))])
-
-        margin1 = np.zeros(height, np.int)
-        margin1.fill(glyph1.width)
-        margin2 = np.zeros(height, np.int)
-        margin2.fill(glyph2.width)
-
-        margin1[glyph1.top - base: glyph1.bottom - base] = np.fliplr(bitmap1).argmax(axis=1)
-        margin2[glyph2.top - base: glyph2.bottom - base] = bitmap2.argmax(axis=1)
-        margins = margin1 + margin2
-        return margins.min()
-
     def optical_distance(self, other):
         distance = other.left - self.right
         return distance + self._optical_correction(other)