Image processing device configured to make shading correction, non-transitory computer-readable computer medium storing image processing program for shading correction, and method of generating readout data using shading correction
AssigneeSeiko Epson Corporation
InventorYuichi Shikagawa
Life of this patent
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Abstract
An image processing device includes: a sensor that reads a print region and a non-print region of a print medium, an image being printed in the print region, the non-print region being a blank area; and a controller that makes shading correction for an output from the sensor, based on a read result from the sensor. The controller sets a patch image printed in the print region to a black reference, sets the non-print region to a white reference, and makes the shading correction, based on properties of the black reference and the white reference at individual locations.
Claims20
An image processing device comprising:
- a sensor mounted in a carriage configured to reciprocate at a predetermined, fixed distance from a print medium, and configured to read a print region and a non-print region of the print medium, an image being printed in the print region, the non-print region being a blank area;
- and
- a controller configured to:
- move the carriage in a prescribed direction;
- set a patch image printed in the print region to a black reference;
- set the non-print region to a white reference;
- and
- make a shading correction for an output from the sensor based on a read result from the sensor, and based on predetermined location-dependent properties of the black reference and the white reference for different locations within the black reference and the white reference,
- wherein the different locations within the black reference and the white reference are different in one or both of:
- the prescribed direction in which the carriage moves and a direction perpendicular to the prescribed direction.
A method of generating readout data, the method comprising:
- moving, by a controller in a prescribed direction, a carriage configured to reciprocate at a predetermined, fixed distance from a print medium;
- reading, by the controller using a sensor mounted in the carriage, a print region and a non-print region of the print medium, an image being printed in the print region, the non-print region being a blank area;
- setting, by the controller, a patch image printed in the print region to a black reference;
- setting, by the controller, the non-print region to a white reference;
- and
- making, by the controller, a shading correction for an output from the sensor based on a read result from the sensor, and based on predetermined location-dependent properties of the black reference and the white reference for different locations within the black reference and the white reference to generate the readout data,
- wherein the different locations within the black reference and the white reference are different in one or both of:
- the prescribed direction in which the carriage moves and a direction perpendicular to the prescribed direction.
A non-transitory computer-readable medium storing an image processing program that, when executed by a controller, causes the controller to:
- move, in a prescribed direction, a carriage configured to reciprocate at a predetermined, fixed distance from a print medium;
- cause a sensor mounted in the carriage to read a print region and a non-print region of the print medium, an image being printed in the print region, the non-print region being a blank area;
- set a patch image printed in the print region to a black reference;
- set the non-print region to a white reference;
- and
- make a shading correction for an output from the sensor based on a read result from the sensor, and based on predetermined location-dependent properties of the black reference and the white reference for different locations within the black reference and the white reference,
- wherein the different locations within the black reference and the white reference are different in one or both of:
- the prescribed direction in which the carriage moves and a direction perpendicular to the prescribed direction.
Dependencies are inferred from the claim text.