Color plane misregistration determinations

A non-transitory memory resource storing machine-readable instructions stored thereon that, when executed, cause a processor of a computing device to:

• generate a plurality of scanned image portions and a corresponding plurality of digital image portions;
• apply a one-dimensional filter to the plurality of scanned image portions in a first direction;
• determine a first color plane misregistration for the plurality of scanned image portions across a second direction compared to a second color plane misregistration for the plurality of corresponding digital image portions across the second direction;
• and
• determine a color plane misregistration direction and a color plane misregistration magnitude for a particular color based on the comparison.

A system, comprising:

• a printing device to generate an image on a substrate from a digital image;
• a scanner device to generate a scanned image from the image on the substrate;
• and
• a processor to:
• generate a first plurality of image portions from the scanned image and a second plurality of image portions from the digital image;
• align the first plurality of image portions with the second plurality of image portions;
• filter the first plurality of image portions utilizing a one-dimensional filter to remove half-toning from the scanned image in a first direction;
• determine a color change of a row of pixels between the first plurality of image portions and the second plurality of image portions in a second direction that is perpendicular to the first direction;
• determine a color plane misregistration of a color is present in the scanned image based on the color change;
• determine a direction and magnitude of color plane misregistration for the color;
• and
• provide the direction and magnitude of color plane misregistration for the color to the printing device.