View code for the main page image, not the category header.

gistfile1.php

$view = new view();
$view->name = 'page_image';
$view->description = '';
$view->tag = 'default';
$view->base_table = 'node';
$view->human_name = 'Page Image';
$view->core = 7;
$view->api_version = '3.0';
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */

/* Display: Master */
$handler = $view->new_display('default', 'Master', 'default');
$handler->display->display_options['use_more_always'] = FALSE;
$handler->display->display_options['access']['type'] = 'perm';
$handler->display->display_options['cache']['type'] = 'none';
$handler->display->display_options['query']['type'] = 'views_query';
$handler->display->display_options['exposed_form']['type'] = 'basic';
$handler->display->display_options['pager']['type'] = 'some';
$handler->display->display_options['pager']['options']['items_per_page'] = '1';
$handler->display->display_options['style_plugin'] = 'default';
$handler->display->display_options['row_plugin'] = 'fields';
/* Field: Content: Header Image */
$handler->display->display_options['fields']['field_header_image']['id'] = 'field_header_image';
$handler->display->display_options['fields']['field_header_image']['table'] = 'field_data_field_header_image';
$handler->display->display_options['fields']['field_header_image']['field'] = 'field_header_image';
$handler->display->display_options['fields']['field_header_image']['label'] = '';
$handler->display->display_options['fields']['field_header_image']['element_label_colon'] = FALSE;
$handler->display->display_options['fields']['field_header_image']['click_sort_column'] = 'fid';
$handler->display->display_options['fields']['field_header_image']['settings'] = array(
  'image_style' => 'page_image',
  'image_link' => '',
);
/* Contextual filter: Content: Nid */
$handler->display->display_options['arguments']['nid']['id'] = 'nid';
$handler->display->display_options['arguments']['nid']['table'] = 'node';
$handler->display->display_options['arguments']['nid']['field'] = 'nid';
$handler->display->display_options['arguments']['nid']['default_action'] = 'default';
$handler->display->display_options['arguments']['nid']['default_argument_type'] = 'node';
$handler->display->display_options['arguments']['nid']['summary']['number_of_records'] = '0';
$handler->display->display_options['arguments']['nid']['summary']['format'] = 'default_summary';
$handler->display->display_options['arguments']['nid']['summary_options']['items_per_page'] = '25';
$handler->display->display_options['arguments']['nid']['specify_validation'] = TRUE;
$handler->display->display_options['arguments']['nid']['validate']['type'] = 'node';
$handler->display->display_options['arguments']['nid']['validate_options']['types'] = array(
  'article' => 'article',
  'event' => 'event',
  'frequently_asked_question' => 'frequently_asked_question',
  'page' => 'page',
  'service' => 'service',
  'webform' => 'webform',
);
/* Filter criterion: Content: Published */
$handler->display->display_options['filters']['status']['id'] = 'status';
$handler->display->display_options['filters']['status']['table'] = 'node';
$handler->display->display_options['filters']['status']['field'] = 'status';
$handler->display->display_options['filters']['status']['value'] = 1;
$handler->display->display_options['filters']['status']['group'] = 1;
$handler->display->display_options['filters']['status']['expose']['operator'] = FALSE;
/* Filter criterion: Content: Type */
$handler->display->display_options['filters']['type']['id'] = 'type';
$handler->display->display_options['filters']['type']['table'] = 'node';
$handler->display->display_options['filters']['type']['field'] = 'type';
$handler->display->display_options['filters']['type']['value'] = array(
  'page' => 'page',
);

/* Display: Block */
$handler = $view->new_display('block', 'Block', 'block');