diff --git a/parse_scandata.py b/parse_scandata.py
index ac64c1a..923f827 100644
--- a/parse_scandata.py
+++ b/parse_scandata.py
@@ -50,13 +50,13 @@ for r in relevant:
 
     #print(pagetype, orig_file_name, rotation, skew, apply_skew, crop_x, crop_y, crop_w, crop_h)
 
-    skew_r = math.radians(-skew)
+    skew_r = math.radians(skew)
 
     if apply_skew:
         top_l = (crop_x, crop_y)
-        top_r = (crop_x + crop_w * math.cos(skew_r), crop_y + crop_w * math.sin(skew_r))
+        top_r = (crop_x + crop_w * math.cos(skew_r), crop_y - crop_w * math.sin(skew_r))
         bottom_l = (crop_x + crop_h * math.sin(skew_r), crop_y + crop_h * math.cos(skew_r))
-        bottom_r = (top_r[0], bottom_l[1] + crop_w * math.sin(skew_r))
+        bottom_r = (top_r[0], bottom_l[1] - crop_w * math.sin(skew_r))
     else:
         top_l = (crop_x, crop_y)
         top_r = (crop_x + crop_w, crop_y)