The services module is responsible for exposing the Drupal data to any external app, with the amfphp module adding that particular functionality. The image, img_assist, pathauto and token modules are used to add images and text descriptions to Drupal. The views module has methods available in the services module, making it convinient to call.
Pulling the data from drupal yields a filepath for the image, the actual file is displayed by adding the IP address to the filepath, e.g. http://10.10.3.131/drupal5/files/images/pic.jpg.
Links of interest:
Reading And Writing Drupal With Flex
Howto: Ubuntu Linux convert DHCP network configuration to static IP configuration