diff --git a/imagefield_crop.module b/imagefield_crop.module
index a675e94..fb467dc 100644
--- a/imagefield_crop.module
+++ b/imagefield_crop.module
@@ -91,6 +91,8 @@ function imagefield_crop_field_update($entity_type, $entity, $field, $instance,
   // deletion of previous file usages are necessary.
   $scale = NULL;
   if ($instance['widget']['settings']['resolution']) {
+    $context = array('entity' => $entity);//'form' => $form);
+    drupal_alter('imagefield_crop_instance', $instance, $context);    
     list($scale['width'], $scale['height']) = explode('x', $instance['widget']['settings']['resolution']);
   }
   // Create a bare-bones entity so that we can load its previous values.
@@ -496,7 +498,9 @@ function imagefield_crop_widget_process($element, &$form_state, $form) {
 
   $instance = field_widget_instance($element, $form_state);
 
-  $settings = $instance['settings'];
+  $context = array('form' => $form);
+  drupal_alter('imagefield_crop_instance', $instance, $context);
+  
   $widget_settings = $instance['widget']['settings'];
   $element['#theme'] = 'imagefield_crop_widget';
   $element['#description'] = t('Click on the image and drag to mark how the image will be cropped');
@@ -636,6 +640,10 @@ function imagefield_crop_widget_preview_process($element, &$form_state, $form) {
   $parents = array_slice($element['#array_parents'], 0, -1);
   $parent = drupal_array_get_nested_value($form, $parents);
   $instance = field_widget_instance($parent, $form_state);
+  
+  $context = array('form' => $form);
+  drupal_alter('imagefield_crop_instance', $instance, $context);
+  
   list($width, $height) = !empty($instance['widget']['settings']['resolution']) ? explode('x', $instance['widget']['settings']['resolution']) : array(0, 0);
 
   $image_info = image_get_info(drupal_realpath($file->uri));