COMPACT IMAGE CONVERSION SYSTEM OPERABLE AT A HIGH SPEED

In an image conversion system including a first table connected to image input device and image output device, the first table is for use in converting a plurality of color information numbers restricted dependent on the image output device into a plurality of color information to be displayed. The image conversion system further has a second table indicated by an image input data supplied from the image input device to produce the color information numbers, first conversion unit for converting the image input data into the color information numbers with reference to the second table, and second conversion unit for converting the color information numbers into the color information with reference to the first table.