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US 2019/0070851 A1Published application
Recording apparatus and recording method
AssigneeCanon Kabushiki Kaisha
InventorsJunichi Nakagawa, Yoshikazu Ishikawa, Akitoshi Yamada
Life of this patent
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Abstract
Quantization is performed on multi-valued data corresponding to a non-overlap recording area and one of recording heads on the basis of a dither pattern and multi-valued data corresponding to the non-overlap recording area and the other one of the recording heads, and also arrangements of thresholds for the dither patterns used between the scanning operations are varied.
Claims19
A recording apparatus comprising:
- a recording unit including a first recording unit having an ejection nozzle array in which a plurality of ejection nozzles for ejecting ink are arranged in a first direction and a second recording unit having an ejection nozzle array in which a plurality of ejection nozzles for ejecting the ink are arranged in the first direction, the second recording unit being arranged at a position away in a second direction intersecting with the first direction from a position where the first recording unit is arranged;
- a scanning unit configured to scan the recording unit multiple times in the second direction with respect to a unit area on a recording medium, the unit area including a first area where an image is recorded by using the first recording unit without using the second recording unit and a second area, which is adjacent to the first area in the second direction, where the image is recorded by using both the first recording unit and the second recording unit;
- an obtaining unit configured to obtain multi-valued data corresponding to a recording operation onto the unit area by the recording unit;
- a generation unit configured to generate recording data for setting ejection or non-ejection of the ink by quantizing the multi-valued data obtained by the obtaining unit by using a plurality of dither patterns in which thresholds for setting ejection or non-ejection of the ink with respect to respective pixels in the unit area are set for the respective pixels;
- and
- a control unit configured to control the recording operation by the recording unit in a manner that the ink is ejected to the unit area on a basis of the recording data generated by the generation unit,
- wherein the obtaining unit obtains first multi-valued data corresponding to a first recording operation by the first recording unit with respect to the first area in a first scanning among the multiple scanning operations, second multi-valued data corresponding to a second recording operation by the first recording unit with respect to the second area in the first scanning, third multi-valued data corresponding to a third recording operation by the second recording unit with respect to the second area in the first scanning, fourth multi-valued data corresponding to a fourth recording operation by the first recording unit with respect to the first area in a second scanning different from the first scanning, fifth multi-valued data corresponding to a fifth recording operation by the first recording unit with respect to the second area in the second scanning, and sixth multi-valued data corresponding to a sixth recording operation by the second recording unit with respect to the second area in the second scanning,
- wherein the generation unit generates first recording data for setting the ejection of the ink in the first recording operation on a basis of the first multi-valued data and a first dither pattern among the plurality of dither patterns, generates second recording data for setting the ejection of the ink in the second recording on a basis of the second multi-valued data and the first dither pattern, generates third recording data for setting the ejection of the ink in the third recording operation on a basis of the second multi-valued data, the third multi-valued data, and the first dither pattern, generates fourth recording data for setting the ejection of the ink in the fourth recording operation on a basis of the fourth multi-valued data and a second dither pattern among the plurality of dither patterns, fifth recording data for setting the ejection of the ink in the fifth recording operation on a basis of the fifth multi-valued data and the second dither pattern, and sixth recording data for setting the ejection of the ink in the sixth recording operation on a basis of the fifth multi-valued data, the sixth multi-valued data, and the second dither pattern, and
- wherein an arrangement of thresholds for the respective pixels in the first dither pattern is different from an arrangement of thresholds for the respective pixels in the second dither pattern.
6 more elements
A recording apparatus comprising:
- a recording unit including a first recording unit having an ejection nozzle array in which a plurality of ejection nozzles for ejecting ink are arranged in a first direction and a second recording unit having an ejection nozzle array in which a plurality of ejection nozzles for ejecting the ink are arranged in the first direction, the second recording unit being arranged at a position away in a second direction intersecting with the first direction from a position where the first recording unit is arranged;
- a scanning unit configured to scan the recording unit multiple times in the second direction with respect to a unit area on a recording medium, the unit area including a first area where an image is recorded by using the first recording unit without using the second recording unit and a second area, which is adjacent to the first area in the second direction, where the image is recorded by using both the first recording unit and the second recording unit;
- and
- a control unit configured to control a recording operation by the recording unit on a basis of recording data in a manner that the ink is ejected to the unit area,
- wherein an arrangement of pixels in which ejection of the ink from the first recording unit to the first area is set in the first scanning is equal to a logical sum of an arrangement of pixels in which ejection of the ink from the first recording unit to the second area is set in the first scanning and an arrangement of pixels in which ejection of the ink from the second recording unit to the second area is set in the first scanning,
- wherein an arrangement of pixels in which ejection of the ink from the first recording unit to the first area is set in the second scanning is equal to a logical sum of an arrangement of pixels in which ejection of the ink from the first recording unit to the second area is set in the second scanning and an arrangement of pixels in which ejection of the ink from the second recording unit to the second area is set in the second scanning, and
- wherein the ink is ejected from the first recording unit to a part of pixels in the first area in both the first scanning and the second scanning.
4 more elements
A recording method comprising:
- obtaining multi-valued data corresponding to a recording operation by a recording unit with respect to a unit area on a recording medium;
- generating recording data for setting ejection or non-ejection of ink by quantizing the obtained multi-valued data by using a plurality of dither patterns in which thresholds for setting ejection or non-ejection of the ink with respect to respective pixels in the unit area are set for the respective pixels;
- and
- recording an image in the unit area by controlling the recording operation by the recording unit in a manner that the recording unit is scanned multiple times in a second direction on a basis of the generated recording data to eject the ink to the unit area,
- wherein the recording unit includes a first recording unit having an ejection nozzle array in which a plurality of ejection nozzles for ejecting the ink are arranged in a first direction intersecting with the second direction and a second recording unit having an ejection nozzle array in which a plurality of ejection nozzles for ejecting the ink are arranged in the first direction, the second recording unit being arranged at a position away in the second direction from a position where the first recording unit is arranged,
- wherein the unit area includes a first area where an image is recorded by using the first recording unit without using the second recording unit and a second area, which is adjacent to the first area in the second direction, where the image is recorded by using both the first recording unit and the second recording unit,
- wherein the obtaining includes obtaining first multi-valued data corresponding to the first recording operation by the first recording unit with respect to the first area in first scanning among the multiple scanning operations, second multi-valued data corresponding to a second recording operation by the first recording unit with respect to the second area in the first scanning, third multi-valued data corresponding to a third recording operation by the second recording unit with respect to the second area in the first scanning, fourth multi-valued data corresponding to a fourth recording operation by the first recording unit with respect to the first area in a second scanning different from the first scanning, fifth multi-valued data corresponding to a fifth recording operation by the first recording unit with respect to the second area in the second scanning, and sixth multi-valued data corresponding to a sixth recording operation by the second recording unit with respect to the second area in the second scanning,
- wherein the generating includes generating first recording data for setting the ejection of the ink in the first recording operation on a basis of the first multi-valued data and a first dither pattern among the plurality of dither patterns, generating second recording data for setting the ejection of the ink in the second recording on a basis of the second multi-valued data and the first dither pattern, generating third recording data for setting the ejection of the ink in the third recording operation on a basis of the second multi-valued data, the third multi-valued data, and the first dither pattern, generating fourth recording data for setting the ejection of the ink in the fourth recording operation on a basis of the fourth multi-valued data and a second dither pattern among the plurality of dither patterns, generating fifth recording data for setting the ejection of the ink in the fifth recording operation on a basis of the fifth multi-valued data and the second dither pattern, and generating sixth recording data for setting the ejection of the ink in the sixth recording operation on a basis of the fifth multi-valued data, the sixth multi-valued data, and the second dither pattern, and
- wherein an arrangement of thresholds for the respective pixels in the first dither pattern is different from an arrangement of thresholds for the respective pixels in the second dither pattern.
6 more elements
A recording method comprising:
- obtaining recording data for setting ejection or non-ejection of ink corresponding to a recording operation by a recording unit with respect to a unit area on a recording medium;
- and
- recording an image in the unit area by controlling the recording operation by the recording unit in a manner that the recording unit is scanned multiple times in the second direction on a basis of the recording data to eject the ink to the unit area,
- wherein the recording unit includes a first recording unit having an ejection nozzle array in which a plurality of ejection nozzles for ejecting ink are arranged in a first direction and a second recording unit having an ejection nozzle array in which a plurality of ejection nozzles for ejecting the ink are arranged in the first direction, the second recording unit being arranged at a position away in a second direction intersecting with the first direction from a position where the first recording unit is arranged,
- wherein the unit area includes a first area where an image is recorded by using the first recording unit without using the second recording unit and a second area, which is adjacent to the first area in the second direction, where the image is recorded by using both the first recording unit and the second recording unit,
- wherein an arrangement of pixels in which ejection of the ink from the first recording unit to the first area is set in a first scanning among the multiple scanning operations is equal to a logical sum of an arrangement of pixels in which ejection of the ink from the first recording unit to the second area is set in the first scanning and an arrangement of pixels in which ejection of the ink from the second recording unit to the second area is set in the first scanning,
- wherein an arrangement of pixels in which ejection of the ink from the first recording unit to the first area is set in a second scanning different from the first scanning is equal to a logical sum of an arrangement of pixels in which ejection of the ink from the first recording unit to the second area is set in the second scanning and an arrangement of pixels in which ejection of the ink from the second recording unit to the second area is set in the second scanning, and
- wherein the ink is ejected from the first recording unit to a part of the pixels in the first area in both the first scanning and the second scanning.
5 more elements
Dependencies are inferred from the claim text.