Correcting registration errors in digital printing
AssigneeLanda Corporation Ltd.
InventorBoris Levant
Life of this patent
Estimating the term…
Abstract
a method for correcting an error in image printing, the method includes receiving a reference digital image (RDI). Based on a predefined selection criterion, one or more regions in the RDI that are suitable for use as anchor features for sensing the error, are automatically selected. A digital image (DI) acquired from a printed image of the RDI, is received and the one or more regions are automatically identified in the DI. Based on the anchor features of the DI, the error is automatically estimated in the printed image. A correction that, when applied to the DI, compensates for the estimated error, is calculated. The estimated error is corrected in a subsequent digital image (SDI) to be printed, and the SDI having the corrected error, is printed.
Claims20
A method for correcting an error in image printing, the method comprising:
- receiving a reference digital image (RDI);
- automatically selecting, based on a predefined selection criterion, one or more regions in the RDI that are suitable for use as anchor features for sensing the error;
- receiving a digital image (DI) acquired from a printed image of the RDI, and automatically identifying the one or more regions in the DI;
- automatically estimating, based on the anchor features of the DI, the error in the printed image;
- calculating a correction that, when applied to the DI, compensates for the estimated error;
- correcting the estimated error in a subsequent digital image (SDI) to be printed;
- and
- printing the SDI having the corrected error.
A system for correcting an error in image printing, the system comprising:
- a processor, which is configured to:
- receive a reference digital image (RDI);
- automatically select, based on a predefined selection criterion, one or more regions in the RDI that are suitable for use as anchor features for sensing the error;
- receive a digital image (DI) acquired from a printed image of the RDI, and automatically identify the one or more regions in the DI;
- automatically estimate, based on the anchor features of the DI, the error in the printed image;
- calculate a correction that, when applied to the DI, compensates for the estimated error;
- and
- correct the estimated error in a subsequent digital image (SDI) to be printed;
- and
- a printing subsystem configured to print the SDI having the corrected error.
Dependencies are inferred from the claim text.