Abstract: A printer calibration method and system uses a personal computer equipped with a color laser server circuit card and a scanner to measure the color effects specific to a printer and to then calibrate print data to adjust for the measured printer effects. Each printer colorant is calibrated by printing a data file using the printer to be calibrated thereby generating a calibration image. The calibration image is next scanned using a scanner coupled to the printing system. The scanned data is compared to the data file which was sent to the printer to determine the relationship (an association) between the data file printed and the resulting calibration image. Color comparisons are made using an absolute density scale and thus the scanned data, being in RGB (Red, Blue, Green) format is converted to absolute density values.

Abstract: A page description language is interpreted by an interpreter which outputs successive object definitions. Each object definition is conditionally added to a display list. Based on certain conditions, the display list is rendered and cleared at various times during the interpretation of the page description. If an object definition describes an image object, the display list is rendered and cleared and the image object is added to the display list. If any objects are clipped in the display list, a corresponding clip object definition output from the interpreter is also ensured to exist within the display list. The display list is also rendered and cleared if it becomes too big in size. Clipping state changes of output object definitions from the interpreter also cause the display list to be rendered and cleared. By conditionally rendering the display list during interpretation, memory, storage, speed and processing requirements are improved for page description processing.

Abstract: A printer calibration method and system uses a personal computer equipped with a color laser server circuit card and a scanner to measure the color effects specific to a printer and to then calibrate print data to adjust for the measured printer effects. Each printer colorant is calibrated by printing a data file using the printer to be calibrated thereby generating a calibration image. The calibration image is next scanned using a scanner coupled to the printing system. The scanned data is compared to the data file which was sent to the printer to determine the relationship (an association) between the data file printed and the resulting calibration image. Color comparisons are made using an absolute density scale and thus the scanned data, being in RGB (Red, Blue, Green) format is converted to absolute density values.