Liquid discharge apparatus, method of forming image, and recording medium

A method of forming an image, the method comprising:

• causing a liquid discharger of a liquid discharge apparatus to relatively scan a non-permeable recording medium a plurality of times both in two directions intersecting each other;
• forming an image including pixels formed with discharge amounts of an active energy ray curable liquid in a predetermined region of the recording medium according to image data;
• generating thinned image data for forming the image in a region for each relative scanning in a first direction of the two directions, using a mask in which pixels allowing formation are arrayed;
• and
• generating the thinned image data such that a spatial frequency of an array of the pixels allowing image formation in the mask for a first discharge amount is uniform in the relative scanning in a second direction of the two directions and the spatial frequency of the array of the pixels allowing image formation in the mask for a second discharge amount gradually decreases toward a downstream side in the relative scanning in the second direction.

A non-transitory recording medium storing program code for causing a liquid discharge apparatus to execute:

• causing a liquid discharger of the liquid discharge apparatus to relatively scan a non-permeable recording medium a plurality of times both in two directions intersecting each other;
• forming an image including pixels formed with discharge amounts of an active energy ray curable liquid in a predetermined region of the recording medium according to image data;
• generating thinned image data for forming the image in a region for each relative scanning in a first direction of the two directions, using a mask in which pixels allowing formation are arrayed;
• and
• generating the thinned image data such that a spatial frequency of an array of the pixels allowing image formation in the mask for a first discharge amount is uniform in the relative scanning in a second direction of the two directions and the spatial frequency of the array of the pixels allowing image formation in the mask for a second discharge amount gradually decreases toward a downstream side in the relative scanning in the second direction.