Image forming apparatus, method of creating gamma correction table, and image forming system
An image forming apparatus includes an image forming unit, an acquisition unit, and a control unit. The image forming unit forms an image on a sheet based on a gamma correction table. The acquisition unit acquires information on a sheet. The control unit controls the image forming unit. The image forming unit forms a first image indicating first image data on a sheet. The acquisition unit acquires the information on the sheet from the first image. The control unit creates second image data for creating a gamma correction table based on the information on the sheet.
1. An image forming apparatus comprising:
a sheet storage unit that stores a sheet;
an image forming unit that forms an image on the sheet according to a gamma correction table;
a first acquisition unit that is disposed in a conveyance path between the sheet storage unit and the image forming unit and that acquires information on the sheet from the sheet conveyed in the conveyance path;
a storage unit that stores as first image data the information on the sheet acquired by the first acquisition unit;
a reading unit; and
a control unit that controls the image forming unit, wherein
the image forming unit forms, on the sheet, a first image based on the first image data stored in the storage unit,
the reading unit acquires the information on the sheet by reading the first image formed on the sheet,
the control unit creates second image data based on the information on the sheet acquired by the reading unit, and
the second image data is image data for creating a gamma correction table for the sheet.
2. The image forming apparatus according to claim 1 , wherein
the information on the sheet indicates at least one of a color of the sheet, a surface characteristic of the sheet, and a basis weight of the sheet.
3. The image forming apparatus according to claim 1 , wherein
the image forming unit forms a second image indicating the second image data on the sheet.
4. The image forming apparatus according to claim 3 , wherein
the reading unit acquires a density of the second image formed on the sheet by reading the second image formed on the sheet, and
the control unit creates the gamma correction table based on the density of the second image acquired by the reading unit.
5. The image forming apparatus according to claim 4 , wherein
the storage unit further stores the gamma correction table created based on the density of the second image.
6. The image forming apparatus according to claim 1 , wherein
the control unit
determines a color of the sheet based on the information on the sheet acquired by the first acquisition unit, and
controls the storage unit so that the storage unit stores a result of determination by the control unit as the first image data.
7. The image forming apparatus according to claim 1 , wherein
the control unit
determines a surface characteristic of the sheet based on the information on the sheet acquired by the first acquisition unit, and
controls the storage unit so that the storage unit stores a result of determination by the control unit as the first image data.
8. The image forming apparatus according to claim 1 , wherein
the control unit
determines a type of the sheet based on the information on the sheet acquired by the first acquisition unit, and
controls the storage unit so that the storage unit stores a result of determination by the control unit as the first image data.
9. An image forming system comprising:
the image forming apparatus according to claim 1 ; and
a postprocessing apparatus that receives the sheet from the image forming apparatus, wherein
the postprocessing apparatus includes a second acquisition unit that acquires a density of the first image formed on the sheet,
the second acquisition unit acquires the information on the sheet by reading the first image formed on the sheet, and
the control unit creates second image data based on the information on the sheet acquired by the second acquisition unit.
10. A method of creating a gamma correction table of an image forming apparatus, the method comprising:
acquiring information on a sheet as first image data by a first acquisition unit disposed in a conveyance path between an image forming unit and a sheet storage unit of the image forming apparatus, the sheet storage unit storing the sheet, the sheet being conveyed in the conveyance path;
storing as first image data the information on the sheet acquired in the acquiring information on a sheet;
forming, on the sheet, a first image base on the first image data stored in the storing;
acquiring the information on the sheet by reading the first image formed on the sheet; and
creating second image data based on the information on the sheet acquired in the acquiring the information on the sheet by reading the first image, wherein
the second image data is image data for creating a gamma correction table for the sheet.