famiana_helper.module

<?php

function famiana_helper_field_widget_image_image_form_alter(&$element, &$form_state, $context) {
  foreach (element_children($element) as $item) {
    $element[$item]['#process'][] = 'famiana_helper_image_field_widget_process';
  }
}


function famiana_helper_image_field_widget_process($element, &$form_state, $form){
  if(isset($element['alt'])){
    $element['alt']['#type'] = 'textarea';
    $element['alt']['#weight'] = 0;
  }
  return $element;
}