Patent ID: 7929180

Claim:
A printing system including a host apparatus which generates print data, and an inkjet printing apparatus which prints an image on a printing medium using the print data transferred from said host apparatus, wherein said host apparatus comprises: a generation unit adapted to generate the print data; a setting unit adapted to set a print condition upon printing an image on the printing medium by a man-machine interactive operation by a user; an analysis unit adapted to analyze whether or not ink blurs upon printing on the printing medium on the basis of the print data generated by said generation unit in accordance with the print condition set by said setting unit; and a warning unit adapted to warn the user about the set print condition in accordance with an analysis result by said analysis unit, wherein said analysis unit includes: a conversion unit adapted to convert the print data into grayscale data; a determination unit adapted to determine for each pixel whether or not a value of the grayscale data falls within values defining a range where a blur occurs; a calculation unit adapted to calculate a ratio of pixels suffering a blur to all pixels of an image represented by the print data in accordance with a determination result by said determination unit; a comparison unit adapted to compare the ratio calculated by said calculation unit with a specific threshold; and a decision unit adapted to decide, from a comparison result by said comparison unit, whether or not an intolerable blur occurs in the image, wherein the values defining the range where a blur occurs are variably set in accordance with a type of printing medium, a print quality of printing by the inkjet printing apparatus, and the number of images laid out on one printing medium.