This invention relates to the updating of image processing control data that is related to image data and controls image processing of the image data. An image related data generator generates an image file that includes image data and image processing data pre-stored therein. The image processing control data can be updated according to the following process. The image related data generator sends specification data that specifies image processing control data to be updated to an update data server. Then the image related data generator receives the update data from the update data server. And the image related generator updates the image processing control data stored therein with the update data.