Index: wp-includes/media.php
===================================================================
--- wp-includes/media.php	(revision 18856)
+++ wp-includes/media.php	(working copy)
@@ -381,7 +381,8 @@
 
 	// the return array matches the parameters to imagecopyresampled()
 	// int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h
-	return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
+	$return = array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
+	return apply_filters('image_resize_dimensions', $return, compact('orig_w', 'orig_h', 'dest_w', 'dest_h', 'crop'));
 
 }