Abstract: A printing apparatus includes a printing unit that prints an image based on image data, and an inspection pattern including a first patch, and a second patch different in color or having the same color and different in density than the first patch, each of the first and second patches being printed so as to extend in the first direction on the printing medium, and the first patch and the second patch being arranged in the second direction. A scanning unit includes a plurality of detection elements arranged in the second direction, and scans the inspection pattern, and a correcting unit corrects the image data based on a scanning result. The scanning unit scans the first patch using a first detection element and scans the second patch by using a second detection element which is farther away from a lens than the first detection element.

Abstract: Priority order is updated so that an ejection port that is selected as an ejection port subjected to ejection failure determination in a pixel row in which a previous ejection operation is to be performed has the lowest priority order, which is used for selecting an ejection port subjected to ejection failure determination, in a pixel row in which a subsequent ejection operation is to be performed.

Abstract: An image forming apparatus comprises a detection unit that detects that a recording material is conveyed to a predetermined position on a conveyance path; a forming unit that forms an examination pattern at a defined position of the recording material; a reading unit that reads an image on the conveyance path when the recording material is being conveyed; a memory that saves read image data during a predetermined period defined based on a detection timing of the detection unit; a specifying unit that specifies an edge of the recording material by detecting an area corresponding to the conveyance path in the image data saved in the memory, and specifies an examination pattern area corresponding to the examination pattern based on the specified edge and the defined position; and an examining unit that examines the examination pattern area.

Abstract: A printing apparatus comprises: a printing unit that performs printing and prints an inspection pattern including a first patch and a second patch different in color or having the same color and different in density so as to extend in the first direction respectively on the printing medium by the plurality of orifices wherein the first patch and the second patch are arranged in the second direction; a scanning unit that includes a plurality of detection elements arranged in the second direction, performs scan in the first direction and, scanning the inspection pattern on the printing medium; and wherein the scanning unit scans the first patch by using a first detection element of the plurality of detection elements and scans the second patch by using a second detection element which is another element of the plurality of detection elements respectively.

Abstract: An image forming apparatus comprises: a detection unit that detects that a recording material is conveyed to a predetermined position on a conveyance path; a forming unit that forms an examination pattern at a defined position of the recording material; a reading unit that reads an image on the conveyance path when the recording material is being conveyed; a memory that saves read image data during a predetermined period defined based on a detection timing of the detection unit; and a specifying unit that specifies an edge of the recording material by detecting an area corresponding to the conveyance path in the image data saved in the memory, and specifies an examination pattern area corresponding to the examination pattern based on the specified edge and the defined position; and an examining unit that examines the examination pattern area.

Abstract: Priority order is updated so that an ejection port that is selected as an ejection port subjected to ejection failure determination in a pixel row in which a previous ejection operation is to be performed has the lowest priority order, which is used for selecting an ejection port subjected to ejection failure determination, in a pixel row in which a subsequent ejection operation is to be performed.

Abstract: Judgment image data having a resolution in a direction in which a printing medium is conveyed which is lower than a printing resolution is generated based on input image data. It is determined whether color unevenness is generated in a printed image by comparing the judgment image data with reading data obtained by reading the printed image.

Abstract: A judgment reference data having a resolution lower than a nozzle resolution in a nozzle arranging direction is generated based on input image data. The judgment reference data and read data acquired by reading a printed image are compared to judge whether the printed image has color unevenness or not.

Abstract: The ink jet printing apparatus, wherein, to print images on a printing medium, a plurality of print heads, each of which includes an ejection port array provided by arranging multiple ink ejection ports in a widthwise direction of the printing medium, are arranged in a conveying direction of the printing medium, including: a unit for detecting a printing position displacement with respect to a printing position of a reference print head on the printing medium for each of remaining print heads excluding the reference print head which is one of the plurality of print heads; and a unit for adding non-image data corresponding to the printing position displacement to print data to be printed by the plurality of print heads, so as to align the printing positions of the plurality of print heads.

Abstract: A judgment reference data having a resolution lower than a nozzle resolution in a nozzle arranging direction is generated based on input image data. The judgment reference data and read data acquired by reading a printed image are compared to judge whether the printed image has color unevenness or not.

Abstract: Judgment image data having a resolution in a direction in which a printing medium is conveyed which is lower than a printing resolution is generated based on input image data. It is determined whether color unevenness is generated in a printed image by comparing the judgment image data with reading data obtained by reading the printed image.

Abstract: A recording apparatus includes: a recording head having a recording element row in which multiple recording elements are disposed, with recording elements at dispersed positions in the recording element rows as blocks; a scanning unit configured to scan the recording head in a main scanning direction; a time-division driving unit configured to drive the recording elements in increments of blocks; a storing unit configured to store recording data; an obtaining unit configured to obtain information relating to the inclination of the recording element row relative to the main scanning direction; and a changing unit operable to change, in increments of individual recording elements, the storage position in the main scanning direction of recording data stored in the storing unit that is to be provided to recording elements of a group, which is configured of consecutive recording elements in each block in the recording element row, based on the obtained information.

Abstract: Correction processing on image data is performed in a short time. An image processing apparatus supplies image data to a recording apparatus configured to convey a recording medium in a direction intersecting a direction in which recording elements are arranged. The image processing apparatus includes: tables containing correction information for each group into which the recording elements are divided, the correction information being used to correct values of multi-valued data; a horizontal/vertical conversion unit configured to convert multi-valued data in raster format into column format; a correction unit configured to correct multi-valued data belonging to a group by using correction information stored in a table corresponding to that group; a vertical/horizontal conversion unit configured to convert the multi-valued data in column form into raster format; and an output unit configured to output the data in raster format converted by the vertical/horizontal conversion unit to the recording apparatus.

Abstract: A printing apparatus which uses a plurality of print element arrays in each of which a plurality of print elements are arranged, and drives a predetermined number of print elements of each of blocks obtained by dividing each of the plurality of the print element arrays into pieces of the predetermined number of the print elements respectively in a time division driving manner, to perform printing on a print medium conveyed, including: a position displacement detecting unit configured to detect print position displacements; and a correction unit configured to perform correction in which pixels which are to be printed by print elements is shifted, the number of the print elements corresponding to an amount of the print position displacement, by a block in each of the plurality of the print element arrays.

Abstract: The ink jet printing apparatus, wherein, to print images on a printing medium, a plurality of print heads, each of which includes an ejection port array provided by arranging multiple ink ejection ports in a widthwise direction of the printing medium, are arranged in a conveying direction of the printing medium, including: a unit for detecting a printing position displacement with respect to a printing position of a reference print head on the printing medium for each of remaining print heads excluding the reference print head which is one of the plurality of print heads; and a unit for adding non-image data corresponding to the printing position displacement to print data to be printed by the plurality of print heads, so as to align the printing positions of the plurality of print heads.

Abstract: Correction processing on image data is performed in a short time. An image processing apparatus supplies image data to a recording apparatus configured to convey a recording medium in a direction intersecting a direction in which recording elements are arranged. The image processing apparatus includes: tables containing correction information for each group into which the recording elements are divided, the correction information being used to correct values of multi-valued data; a horizontal/vertical conversion unit configured to convert multi-valued data in raster format into column format; a correction unit configured to correct multi-valued data belonging to a group by using correction information stored in a table corresponding to that group; a vertical/horizontal conversion unit configured to convert the multi-valued data in column form into raster format; and an output unit configured to output the data in raster format converted by the vertical/horizontal conversion unit to the recording apparatus.

Abstract: Correction processing on image data is performed in a short time. An image processing apparatus supplies image data to a recording apparatus configured to convey a recording medium in a direction intersecting a direction in which recording elements are arranged. The image processing apparatus includes: tables containing correction information for each group into which the recording elements are divided, the correction information being used to correct values of multi-valued data; a horizontal/vertical conversion unit configured to convert multi-valued data in raster format into column format; a correction unit configured to correct multi-valued data belonging to a group by using correction information stored in a table corresponding to that group; a vertical/horizontal conversion unit configured to convert the multi-valued data in column form into raster format; and an output unit configured to output the data in raster format converted by the vertical/horizontal conversion unit to the recording apparatus.

Abstract: A recording apparatus includes: a recording head having a recording element row in which multiple recording elements are disposed, with recording elements at dispersed positions in the recording element rows as blocks; a scanning unit configured to scan the recording head in a main scanning direction; a time-division driving unit configured to drive the recording elements in increments of blocks; a storing unit configured to store recording data; an obtaining unit configured to obtain information relating to the inclination of the recording element row relative to the main scanning direction; and a changing unit operable to change, in increments of individual recording elements, the storage position in the main scanning direction of recording data stored in the storing unit that is to be provided to recording elements of a group, which is configured of consecutive recording elements in each block in the recording element row, based on the obtained information.

Abstract: A recording apparatus includes: a recording head having a recording element row in which multiple recording elements are disposed, with recording elements at dispersed positions in the recording element rows as blocks; a scanning unit configured to scan the recording head in a main scanning direction; a time-division driving unit configured to drive the recording elements in increments of blocks; a storing unit configured to store recording data; an obtaining unit configured to obtain information relating to the inclination of the recording element row relative to the main scanning direction; and a changing unit operable to change, in increments of individual recording elements, the storage position in the main scanning direction of recording data stored in the storing unit that is to be provided to recording elements of a group, which is configured of consecutive recording elements in each block in the recording element row, based on the obtained information.

Abstract: Correction processing on image data is performed in a short time. An image processing apparatus supplies image data to a recording apparatus configured to convey a recording medium in a direction intersecting a direction in which recording elements are arranged. The image processing apparatus includes: tables containing correction information for each group into which the recording elements are divided, the correction information being used to correct values of multi-valued data; a horizontal/vertical conversion unit configured to convert multi-valued data in raster format into column format; a correction unit configured to correct multi-valued data belonging to a group by using correction information stored in a table corresponding to that group; a vertical/horizontal conversion unit configured to convert the multi-valued data in column form into raster format; and an output unit configured to output the data in raster format converted by the vertical/horizontal conversion unit to the recording apparatus.