1. An information processing apparatus connected to an image input apparatus which is capable of executing predetermined image processing on input image data and outputting the processed image data, the information processing apparatus comprising: first storage means for storing image data output from the image input apparatus; instruction input means for inputting setting information for image processing according to an instruction from an operator; and image processing means for executing image processing that can be executed by the image input apparatus, on the image data stored in said first storage means based on the setting information input by said instruction input means.