Print inspection apparatus, print system, print inspection method, and non-transitory recording medium

A print inspection apparatus comprising:

• circuitry configured to:
• generate a difference image based on a comparison between a read image obtained by reading printed matter printed by a printer and a reference image, and
• inspect a defect of the printed matter using the difference image, a plurality of size thresholds, and a plurality of density thresholds corresponding to each of the plurality of size thresholds;
• and
• a memory that stores a plurality of threshold sets each including a combination of the plurality of density thresholds and the plurality of size thresholds,
• wherein:
• the circuitry is further configured to cause a display to display a setting screen to set the threshold sets, and
• the circuitry is further configured to:
• receive an input of a density threshold corresponding to one size threshold among the plurality of size thresholds via the setting screen, and
• calculate a density threshold corresponding to another size threshold based on the density threshold corresponding to the one size threshold.

A print inspection apparatus comprising:

• circuitry configured to:
• generate a difference image based on a comparison between a read image obtained by reading printed matter printed by a printer and a reference image, and
• inspect a defect of the printed matter using the difference image, a plurality of size thresholds, and a plurality of density thresholds corresponding to each of the plurality of size thresholds;
• and
• a memory that stores a plurality of threshold sets each including a combination of the plurality of density thresholds and the plurality of size thresholds,
• wherein:
• the circuitry is further configured to cause a display to display a setting screen to set the threshold sets, and
• the circuitry is further configured to calculate a new threshold set based on two existing threshold sets in a case where the threshold sets are set.

A print inspection apparatus, comprising:

• circuitry configured to:
• generate a difference image based on a comparison between a read image obtained by reading printed matter printed by a printer and a reference image,
• inspect a defect of the printed matter using the difference image, a plurality of size thresholds, and a plurality of density thresholds corresponding to each of the plurality of size thresholds,
• determine a defect of the printed matter using the plurality of density thresholds, and further determine whether the defect having been determined using the plurality of density thresholds is a defect using the plurality of size thresholds, and
• determine, as the defect, a linear defect of the printed matter,
• wherein:
• the plurality of density thresholds and the plurality of size thresholds include a combination of the plurality of density thresholds and the plurality of size thresholds to determine the linear defect,
• the linear defect includes a vertical linear defect and a lateral linear defect, and
• the plurality of density thresholds and the plurality of size thresholds include a combination of the plurality of density thresholds and the plurality of size thresholds to determine the vertical linear defect, and a combination of the plurality of density thresholds and the plurality of size thresholds to determine the lateral linear defect.