Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorTomohisa Itagaki
Life of this patent
Estimating the term…
Abstract
The present invention provides an image forming apparatus that forms a test pattern for controlling the amount of color material, suppresses increase of the color material amount, and prevents image defects such as spattering, poor fixation due to granularity, or the like. To accomplish this, the image forming apparatus forms a test pattern on printing material using color material of a plurality of colors, reads the formed test pattern, and controls the color material amount of each color by changing an image forming condition in accordance with a result of the reading. Note that the image forming apparatus forms a mixed pattern image using color material of a plurality of chromatic colors, and controls the amount of color material of a single color based on the mixed pattern image.
Claims9
An image forming apparatus that forms an image using color material of a plurality of colors, the image forming apparatus comprising:
- an image forming unit that forms a test pattern on printing material using the color material of a plurality of colors;
- a reading unit that reads the test pattern formed by the image forming unit on the printing material;
- and
- a control unit that controls an amount of color material of each color by changing an image forming condition in accordance with a result of reading by the reading unit,
- wherein the image forming unit forms a mixed pattern image, as the test pattern, in which color material of a plurality of chromatic colors are used, and
- the control unit controls an amount of color material of a single color based on a result of reading the mixed pattern image by the reading unit.
An image forming apparatus that forms an image using color material of a plurality of colors, the image forming apparatus comprising:
- an image forming unit that forms a test pattern on printing material using the color material of a plurality of colors;
- a reading unit that reads the test pattern formed by the image forming unit on the printing material;
- and
- a control unit that controls an amount of color material of each color by changing an image forming condition in accordance with a result of reading by the reading unit,
- wherein the image forming unit forms a mixed pattern image by forming the test pattern on printing material of a chromatic color, and
- the control unit controls an amount of color material of a single color based on a result of reading the mixed pattern image by the reading unit.
An image forming apparatus that forms an image using color material of a plurality of colors, the image forming apparatus comprising:
- an image forming unit that forms a test pattern on printing material using the color material of a plurality of colors;
- a reading unit that reads the test pattern formed by the image forming unit on the printing material;
- and
- a control unit that controls an amount of color material of each color by changing an image forming condition in accordance with a result of reading by the reading unit,
- wherein the image forming unit forms a mixed pattern image by superimposing the test pattern on printing material on which a pattern image of a chromatic color is formed, and
- the control unit controls an amount of color material of a single color based on a result of reading the mixed pattern image by the reading unit.
Dependencies are inferred from the claim text.