Halftone image creation

A controller comprising a processing resource in communication with a memory resource including instructions executable to:

• determine a first growth sequence for a plurality of pixels within each of a plurality of microcells within a supercell;
• determine a shape of a highlight core within each of the plurality of microcells;
• determine a second growth sequence for a plurality of pixels within the supercell turned on within each highlight core;
• determine a third growth sequence for a plurality of pixels within the supercell turned on outside each highlight core;
• and
• create a halftone screen for an unequal resolution printing device associated with the controller based on the first growth sequence;
• the shapes of the highlight cores, the second growth sequence, and the third growth sequence.

A non-transitory computer readable medium containing instructions executable by a processing resource to cause the processing resource to:

• determine a first highlight core shape of a first microcell within a supercell,
• wherein the first microcell comprises a first plurality of pixels divided into slivers of a plurality subpixels;
• determine a second highlight core shape of a second microcell of pixels within the supercell,
• wherein the second microcell comprises a second plurality of pixels divided into slivers of a plurality subpixels;
• determine a growth sequence for each of the first highlight core, the second highlight core, and between the first highlight core and the second highlight core;
• execute each of the growth sequences;
• and
• create a halftone screen for an unequal resolution printing device using a constrained direct binary search (DBS) model and based on the execution of the growth sequences.