Hewlett-packard Development Company, L.P.

Purdue Research Foundation

Wan-Eih Huang

Jan Philip Allebach

Mark Q Shaw

Richard Eric Maggard

Renee Jeanette Jessome

Kurt Robert Bengston

Tongyang Liu

Examples of methods are described herein. In some examples, a method includes calculating a first cost function measure based on band defects in an image. In some examples, the method also includes calculating a second cost function measure based on the band defects and a synthetic band. In some examples, the method further includes detecting a missing band based on a comparison of the first cost function measure and the second cost function measure.

Missing band detection

Example implementations relate to halftone image creation. An example non-transitory machine-readable medium can include instructions executable to determine a highlight core shape and a shadow core shape of a microcell within a supercell. The instructions can be executable to determine growth sequences for a plurality of pixels within the highlight core and the shadow core and between the microcell and other microcells within the supercell, divide each of the plurality of pixels into a plurality of subpixels, and create a halftone image for an unequal resolution printing device using a constrained direct binary search model and based on the highlight core shape, shadow core shape, growth sequences, and the plurality of subpixels.

Halftone image creation

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West Lafayette, IN, United States of America

Wan-Eih Huang