IMAGE PROCESSING SYSTEM, IMAGE OUTPUT DEVICE, AND IMAGE PROCESSING METHOD

An image processing system includes an image reading device and an image output device. The image reading device includes an image conversion unit configured to create a low-quality image by reducing a quality of a predetermined image, a dictionary creating unit configured to create a dictionary for restoring the low-quality image to the predetermined image, the dictionary being created by using the predetermined image and the low-quality image, and a sending unit configured to send the low-quality image and the dictionary or information relating to the dictionary. The image output device includes a receiving unit configured to receive the low-quality image and the dictionary or the information relating to the dictionary, and an image restoring unit configured to restore the low-quality image to the predetermined image, by using the dictionary or the information relating to the dictionary.