Image processing apparatus, image processing method, and storage medium for correcting a measurement value using a recording element that ejects ink
AssigneeCanon Kabushiki Kaisha
InventorShoei Moribe
Life of this patent
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Abstract
An apparatus corrects a measurement value obtained by measuring a first image formed using a recording element that ejects ink, to identify a density characteristic of the recording element. The apparatus includes a first acquisition unit configured to acquire a second image obtained by measuring the first image, an identification unit configured to identify a boundary between regions in the second image, each of the regions corresponding to one of a plurality of head modules including the recording element, and a first correction unit configured to correct a measurement value of the second image based on the identified boundary.
Claims19
An apparatus that corrects a measurement value obtained by measuring a first image formed using a recording element that ejects ink, to identify a density characteristic of the recording element, the apparatus comprising:
- at least one processor;
- and
- a memory coupled to the at least one processor storing instructions that, when executed by the processor, cause the processor to function as:
- a first acquisition unit configured to acquire a second image obtained by measuring the first image;
- an identification unit configured to identify a boundary between regions in the second image, each of the regions corresponding to one of a plurality of head modules including the recording element;
- a first correction unit configured to correct a measurement value of the second image based on the identified boundary;
- a second acquisition unit configured to acquire image data representing an image formed on a recording medium;
- and
- a second correction unit configured to correct a signal value in the image data, based on the corrected measurement value.
A system comprising:
- an image forming apparatus including a recording element configured to eject ink;
- at least one processor;
- and
- a memory coupled to the at least one processor storing instructions that, when executed by the processor, cause the processor to function as:
- a measurement unit configured to acquire a second image including pixels each having a measurement value obtained by measuring a first image formed by the image forming apparatus using the recording element;
- and
- an image processing unit configured to correct the measurement value in each of regions in the second image, each of the regions corresponding to one of a plurality of head modules including the recording element;
- a second acquisition unit configured to acquire image data representing an image formed on a recording medium;
- and
- a second correction unit configured to correct a signal value in the image data, based on the corrected measurement value,
- wherein the image forming apparatus forms an input image corrected based on the corrected measurement value, onto a recording medium using the recording elements.
A method of correcting a measurement value obtained by measuring a first image formed using a recording element that ejects ink, to identify a density characteristic of the recording element, the method comprising:
- acquiring a second image obtained by measuring the first image;
- identifying a boundary between regions in the second image, each of the regions corresponding to one of a plurality of head modules including the recording element;
- correcting a measurement value of the second image based on the identified boundary;
- acquiring image data representing an image formed on a recording medium;
- and
- correcting a signal value in the image data, based on the corrected measurement value.
A non-transitory computer-readable storage medium storing instructions that, when executed by a computer, cause the computer to perform a method of correcting a measurement value obtained by measuring a first image formed using a recording element that ejects ink, to identify a density characteristic of the recording element, the method comprising:
- acquiring a second image obtained by measuring the first image;
- identifying a boundary between regions in the second image, each of the regions corresponding to one of a plurality of head modules including the recording element;
- correcting a measurement value of the second image based on the identified boundary;
- acquiring image data representing an image formed on a recording medium;
- and
- correcting a signal value in the image data, based on the corrected measurement value.
Dependencies are inferred from the claim text.