IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND IMAGE FORMING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an image forming apparatus and the like capable of representing smooth gradation images.SOLUTION: An image forming apparatus refers to a first tone curve indicating the relationship between a data dot percent and print matter dot percent regarding a first screen pattern in which dots are arranged in a predetermined direction and angle, and a second tone curve indicating the relationship between a data dot percent and printed matter dot percent of a second screen pattern in which dots are arranged in an angle different from the angle of the first screen pattern, so as to combine an image representing the first screen pattern for each predetermined data dot percent and an image representing the second screen pattern to form an image representing a screen pattern for gradation. At this time, the second tone curve is a tone curve in which tone jump does not occur in the vicinity of the printed matter dot percent in the first tone curve where tone jump occurs.