Abstract: An inkjet printing apparatus and an inkjet printing method capable of suppressing generation of bronze phenomenon regardless of the color gamut are provided. For this purpose, in multipass printing, more pixels permitted to print by at least one type of achromatic color ink than pixels permitted to print by chromatic color ink in the last print scan to a unit region are set. Accordingly, it becomes possible to apply achromatic color ink having a high bronze phenomenon reduction effect on the topmost layer of the print medium, and thereby generation of bronze phenomenon can be suppressed without any hue shift.

Abstract: An ink jet printing apparatus and an ink jet printing method capable of suppressing the occurrence of the texture or the feeling of granularity at a joint part even in the case where a thinning ratio in a boundary region is adjusted in order to reduce a joint streak are provided. To achieve such purposes, one dot arrangement pattern is set from a plurality of dot arrangement patterns for each pixel in accordance with a gradation level and a position on a printing medium. At this time, in a pixel region located at the joint part, a second dot arrangement pattern whose number of dots is different from a first dot arrangement pattern, which is set in the pixel region located at a part other than the joint part, is arranged so that low frequency components are less than high frequency components.

Abstract: The present disclosure is directed to an image printing apparatus, image printing method, and image processing apparatus. The image printing apparatus and image printing method print images by controlling the connectivity of dots by using mask patterns having different numbers of print permitting pixels in accordance with the attributes of the images.

Abstract: The present disclosure is directed to an image printing apparatus, image printing method, and image processing apparatus. The image printing apparatus and image printing method print images by controlling the connectivity of dots by using mask patterns having different numbers of print permitting pixels in accordance with the attributes of the images.

Abstract: An ink jet printing apparatus and an image processing apparatus capable of stably outputting an image with no joint streak even in the case where printing conditions, such as the kind of ink and the kind of printing medium, change in a variety of ways are provided. For this purpose, correction processing is performed on image data corresponding to an eject port group located at one end part of an eject port column in a first printing scan and on image data corresponding to an eject port group located at the other end part in a second printing scan. At this time, the number of eject ports included in a first eject port group and the number of eject ports included in a second eject port group are adjusted in accordance with printing conditions.

Abstract: The number of recording-permitted pixels in an increment in each of multiple mask patterns is a relatively small number, and the number of recording-permitted pixels in an increment in each of multiple logical sum patterns is a relatively large number.

Abstract: A printing apparatus that includes nozzle arrays, formed of nozzles for ejecting ink of the first to fourth ink color groups, and that scans a print medium while moving the nozzle arrays to perform printing. For printing a unit area of a print medium, where printing is to be completed by performing a plurality of scans, the printing apparatus performs a plurality of scans, and conveys, between movements, a print medium a predetermined amount, which is equivalent to the width of the unit area. Then, to perform a plurality of scans using the nozzle arrays for the first to fourth ink color groups, print data are generated, so that for the nozzle arrays that belong to two ink color groups, the nozzle array for the first ink color group is employed to eject ink into the unit area prior to the nozzle array for the second ink color group.

Abstract: A printing apparatus that includes nozzle arrays, formed of nozzles for ejecting ink of the first to fourth ink color groups, and that scans a print medium while moving the nozzle arrays to perform printing. For printing a unit area of a print medium, where printing is to be completed by performing a plurality of scans, the printing apparatus performs a plurality of scans, and conveys, between movements, a print medium a predetermined amount, which is equivalent to the width of the unit area. Then, to perform a plurality of scans using the nozzle arrays for the first to fourth ink color groups, print data are generated, so that for the nozzle arrays that belong to two ink color groups, the nozzle array for the first ink color group is employed to eject ink into the unit area prior to the nozzle array for the second ink color group.

Abstract: An ink jet printing apparatus and an ink jet printing method capable of suppressing the occurrence of the texture or the feeling of granularity at a joint part even in the case where a thinning ratio in a boundary region is adjusted in order to reduce a joint streak are provided. To achieve such purposes, one dot arrangement pattern is set from a plurality of dot arrangement patterns for each pixel in accordance with a gradation level and a position on a printing medium. At this time, in a pixel region located at the joint part, a second dot arrangement pattern whose number of dots is different from a first dot arrangement pattern, which is set in the pixel region located at apart other than the joint part, is arranged so that low frequency components are less than high frequency components.

Abstract: An ink jet printing apparatus and an image processing apparatus capable of stably outputting an image with no joint streak by making the density uniform in the entire range in which the joint streak appears are provided. Consequently, the number of dots that are printed is adjusted for image data corresponding to the boundary part between printing scans performed twice and the vicinity thereof. At this time, a ration in which the number of dots that are printed in increased or decreased from a default value based the image data is changed stepwise toward a direction in which the distance from the boundary part increases. Due to this, adjustment of an appropriate number of dots in accordance with each position within the range in which the joint streak appears is performed, and therefore, it is possible to make the joint streak no longer conspicuous.

Abstract: An ink jet printing apparatus and an image processing apparatus capable of stably outputting an image with no joint streak even in the case where printing conditions, such as the kind of ink and the kind of printing medium, change in a variety of ways are provided. For this purpose, correction processing is performed on image data corresponding to an eject port group located at one end part of an eject port column in a first printing scan and on image data corresponding to an eject port group located at the other end part in a second printing scan. At this time, the number of eject ports included in a first eject port group and the number of eject ports included in a second eject port group are adjusted in accordance with printing conditions.

Abstract: The present invention provides an inkjet printing apparatus and an inkjet printing method for printing a high-definition image while improving glossiness of the image surface without causing complication and enlargement of the apparatus. A plurality of inks are ejected from first and second printing heads so that a weighted average of a printing rate for each scan regarding an ink having the highest lightness becomes the largest among the plurality of inks and so that a maximum value regarding the printing rate of the ink having the highest lightness becomes larger than those of other inks.

Abstract: A recording apparatus that continuously vary a first boundary formed by different discharge port arrays in an area on a recording medium corresponding to a first overlap portion, and a second boundary formed by different discharge port arrays on an area of the recording medium corresponding to a second overlap portion close to the first overlap portion, wherein a shape of the variation of the first boundary and a shape of the variation of the second boundary are different from each other.

Abstract: The number of recording-permitted pixels in an increment in each of multiple mask patterns is a relatively small number, and the number of recording-permitted pixels in an increment in each of multiple logical sum patterns is a relatively large number.

Abstract: A printing apparatus performs printing using a print head in which a plurality of ejection port arrays are arranged in such a way as to form overlap portions. Ink is ejected such that a shape of a first boundary between images printed in a first unit region by ejection ports of a first ejection port array and a second ejection port array in an overlap portion and a shape of a second boundary between images printed in a second unit region in first and second operations of scanning continuously change in an array direction as positions of the first and second boundaries change in a cross direction and the shape of the second boundary becomes different from the shape of the first boundary.

Abstract: A printing apparatus that includes nozzle arrays, formed of nozzles for ejecting ink of the first to fourth ink color groups, and that scans a print medium while moving the nozzle arrays to perform printing. For printing a unit area of a print medium, where printing is to be completed by performing a plurality of scans, the printing apparatus performs a plurality of scans, and conveys, between movements, a print medium a predetermined amount, which is equivalent to the width of the unit area. Then, to perform a plurality of scans using the nozzle arrays for the first to fourth ink color groups, print data are generated, so that for the nozzle arrays that belong to two ink color groups, the nozzle array for the first ink color group is employed to eject ink into the unit area prior to the nozzle array for the second ink color group.

Abstract: A recording apparatus that continuously vary a first boundary formed by different discharge port arrays in an area on a recording medium corresponding to a first overlap portion, and a second boundary formed by different discharge port arrays on an area of the recording medium corresponding to a second overlap portion close to the first overlap portion, wherein a shape of the variation of the first boundary and a shape of the variation of the second boundary are different from each other.

Abstract: Provided is an image processing apparatus and image processing method that are capable of outputting an image wherein seam lines caused by sudden conveyance error are difficult to notice even for a small number of multi passes printing. In order to achieve this, the number of dots that are printed in pixels is adjusted according to the density level so that the number of dots that are printed in pixels corresponding to boundary portions is larger than in pixels corresponding to areas that are not boundary portions, and so that the number of dots that are printed in pixels corresponding to boundary portions increases the higher the density level of the pixels is. As a result, it is possible to avoid the occurrence of white stripes in high-density areas without emphasizing black stripes in low-density areas.

Abstract: An ink jet printing apparatus, for each level, employs a plurality of density patterns to prevent cancellation of a granularity reduction effect that has been provided by an increase in resolution. Specifically, when determining an arrangement of dot-on areas in the density pattern, the dot-on areas is not located in the areas of a first row of the each of the plurality of density patterns. Thereby, whitish areas appear with the same cycle as a use cycle of the density patterns in a longitudinal direction and thus the whitish areas is not unevenly located. As a result, granularity is prevented from increasing.

Abstract: A printing apparatus performs printing using a print head in which a plurality of ejection port arrays are arranged in such a way as to form overlap portions. Ink is ejected such that a shape of a first boundary between images printed in a first unit region by ejection ports of a first ejection port array and a second ejection port array in an overlap portion and a shape of a second boundary between images printed in a second unit region in first and second operations of scanning continuously change in an array direction as positions of the first and second boundaries change in a cross direction and the shape of the second boundary becomes different from the shape of the first boundary.