Apparatus and method for diagnosing the operation of a printing system

Claim 1

In a printing system for processing a print job including an input image data file written in a page description language, the input image data file including image data and instructions directing the printing system in a manner of producing an electronic page including a first image based on the image data, a diagnostic system for diagnosing a capability of the printing system to interpret the input image data file within an acceptable degree of accuracy, comprising: an interpreter for interpreting the input image data file so as to obtain a first output including the first image based on image data corresponding with the first image; a memory for storing a reference output image data file corresponding substantially with a second output including a second image, the second output representing an ideal output that would be obtained as a result of interpreting the input image data file within the acceptable degree of accuracy; and a comparator for comparing a substantial portion of the first image of the first output with a substantial portion of the second image of the second output to determine whether the input image data file has been interpreted within the acceptable degree of accuracy, a user of the printing system being provided with an indication, at an output device, as to whether the input image data file has been interpreted within the acceptable degree of accuracy so that an interaction between the user of the printing system and the printing system, with respect to interpretation accuracy, is obtained.