Lateral adjustment of print substrate based on a camera image
AssigneeHewlett-Packard Development Company, L.P.
InventorsAlexander Paker, Jonathan Nir, Hagay Shkalim, Eitan Kichli, Vladimir Feygelman, Shraga Friedman
Life of this patent
Estimating the term…
Abstract
A printing device is provided comprising a camera to capture an image of at least a portion of a print substrate; a controller to determine a location of a portion of a side edge of the substrate from the image to determine a distance of the print substrate from a predetermined location; and adjustment apparatus to adjust the entire substrate laterally, relative to the direction of transport of the substrate, based on the determined location.
Claims20
A printing device comprising:
- a camera to capture an image of at least a portion of a print substrate;
- a controller to determine, from the image, a location of a portion of a side edge of the print substrate, and determine a distance of the print substrate from a predetermined location;
- and
- an adjustment apparatus to adjust, based on the determined distance, the print substrate laterally relative to a direction of transport of the print substrate,
- wherein:
- the adjustment apparatus comprises nip rollers and a gripper,
- the controller is to control the gripper and/or the nip rollers to hold the print substrate still while the camera captures the image, and control the nip rollers to release the print substrate to allow the gripper to adjust the print substrate laterally based on the determined distance, and
- the predetermined location is a location on the gripper.
A method comprising:
- capturing, using a camera during registration of a print substrate in a printing device, an image of a portion of the print substrate;
- determining, from the image, a location of a portion of a boundary of the print substrate;
- determining a distance of the location of the portion of the boundary from a reference location on a gripper of the printing device, the gripper to grip the print substrate;
- and
- adjusting, by controlling the gripper based on the determined distance, the print substrate laterally relative to a direction of transport of the print substrate, to register the print substrate relative to the reference location, wherein the portion of the boundary is a portion of a side edge or a corner of the print substrate.
A non-transitory machine-readable storage medium comprising instructions that upon execution cause a system to:
- receive an image captured by a camera of at least a portion of a print substrate in a printing device;
- determine a location of a portion of a side edge of the print substrate from the image;
- detect, in the image, a reference location on a gripper in the printing device, the gripper to rig substrate;
- and
- determine a lateral adjustment, relative to a direction of transport of the print substrate, based on the determined location and the reference location, the lateral adjustment to relocate the print substrate to a target location using the gripper.
Dependencies are inferred from the claim text.