Image comparison calibrations
AssigneeHewlett-Packard Development Company, L.P.
InventorBrian Todd Bartlow
Life of this patent
Estimating the term…
Abstract
An example device may include a controller comprising a processor and a memory storing instructions executable by the processor, wherein the processor is to execute the instructions to cause an image forming device to print an image onto a target sheet of media routed through a media path from an input media tray; receive an input corresponding to the image printed onto the target sheet of media; determine, based on the input, a degree of rotation of the image; and calibrate a rotation parameter of the image forming device in response to the degree of rotation determined from the input.
Claims19
A controller, comprising:
- a processor;
- and
- a memory storing instructions executable by the processor, wherein the processor is to execute the instructions to:
- cause an image forming device to print an image onto a target sheet of media routed through a media path from an input media tray, wherein the target sheet of media includes a pre-printed pattern of symbols arranged in a plurality of predefined zones, each zone having a calibrated orientation, and wherein the image includes a corresponding pattern of symbols arranged in the plurality of predefined zones;
- receive an input corresponding to the image printed onto the target sheet of media, wherein for each zone, the pre-printed pattern of symbols is compared to the corresponding pattern of symbols of the printed image and a pre-printed symbol and a printed symbol located in the same zone that are in closest proximity to each other are selected;
- determine, based on the selected symbols across the plurality of zones, a degree of rotation of the image;
- and
- calibrate a rotation parameter of the image forming device in response to the degree of rotation determined from the zone-based proximity selection.
A non-transitory memory resource storing machine-readable instructions stored thereon that, when executed, cause a processor of an image forming device to:
- cause a target sheet of media to be fed from an input tray of the image forming device to a print zone of the image forming device through a media path of the image forming device;
- cause the image forming device to print, while the target sheet of media is in the print zone, an image onto the target sheet of media, the target sheet of media including a pre-printed pattern of symbols arranged in a plurality of predefined zones, each zone having a calibrated orientation, and the image including a corresponding pattern of symbols arranged in the plurality of predefined zones;
- receive an input corresponding to the image printed onto the target sheet of media;
- for each zone, compare the pre-printed pattern of symbols to the corresponding pattern of symbols of the image printed onto the target sheet of media and select a pre-printed symbol and a printed symbol located in the same zone that are in closest proximity to each other;
- determine, based on the selected symbols across the plurality of zones, a scale of the image;
- and
- calibrate a scaling parameter of the image forming device in response to the scale of the image determined from the zone-based proximity selection.
A method, comprising:
- printing, via an image forming device, onto a target sheet of media an image, the target sheet of media including a pre-printed pattern of symbols arranged in a plurality of predefined zones, each zone having a calibrated orientation, and the image including a corresponding pattern of symbols arranged in the plurality of predefined zones;
- receiving, via a processor, an input corresponding to the image printed onto the target sheet of media;
- for each zone, comparing the pre-printed pattern of symbols to the corresponding pattern of symbols of the image printed onto the target sheet of media and selecting a pre-printed symbol and a printed symbol located in the same zone that are in closest proximity to each other;
- determining, via the processor, based on the selected symbols across the plurality of zones a degree of rotation and a scale of the image printed onto the target sheet of media;
- and
- calibrating, via the processor, a rotation parameter, a scaling parameter, or a combination thereof, of the image forming device based on the degree of rotation and the scale of the image determined from the zone-based proximity selection.
Dependencies are inferred from the claim text.