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US 6,606,464 B2Granted
Method and apparatus for image reading and image forming, with shading operation control for increased throughput
AssigneeRicoh Company, Ltd.
InventorTetsuo Asakawa
Life of this patent
Estimating the term…
Abstract
A method and apparatus for image reading and image forming. A shading operation is performed by initially setting an operation parameter necessary for the shading operation and an image reading operation. The shading operation is then performed, an image reading operation is executed, and a further shading operation is then performed after the image reading operation. An operation parameter is then again set when a preparation of a next image reading operation is completed, an image reading operation is performed, and then a further shading operation is performed.
Claims30
An image reading device, comprising:
- an exposure optical system configured to read images of a first original document and a second original document conveyed on a platen at a fixed speed;
- a shading plate configured to be read by said exposure optical system for correcting a white level of the read image information;
- a carriage configured to move an image reading position of said exposure optical system for reading said shading plate;
- and
- a controller configured to move said carriage to a position where said shading plate is disposed so as to perform a shading operation before and after reading the image of the first original document, and to not perform a further shading operation before reading the image of the second original document.
2 more elements
An image reading device, comprising:
- an exposure optical system configured to read an image of an original document conveyed on a platen at a fixed speed;
- a shading plate configured to be read by said exposure optical system for correcting a white level of the read image information;
- a carriage configured to move an image reading position of said exposure optical system for reading said shading plate;
- and
- a controller configured to control said carriage such that a shading operation is performed immediately after an image of a next original document is read without performing the shading operation before reading the image of the next original document when the shading operation is performed after an image of the original document is read.
2 more elements
An image reading device, comprising:
- an exposure optical system configured to read an image of an original document conveyed on a platen at a fixed speed;
- a shading plate configured to be read by said exposure optical system for correcting a white level of the read image information;
- a carriage configured to move an image reading position of said exposure optical system for reading said shading plate;
- and
- a controller configured to move said carriage to a position where said shading plate is disposed so as to perform a shading operation before reading the image of the original document,
- wherein, in a case in which images of a plurality of original documents are read, said controller controls the device such that a switched image quality mode is set and the shading operation is performed before an image of a next original document is read when an image quality mode set for reading an image of a preceding original document is switched before the image of the next original document is read.
3 more elements
An image reading device, comprising:
- an exposure optical system configured to read an image of an original document conveyed on a platen at a fixed speed;
- a shading plate configured to be read by said exposure optical system for correcting a white level of the read image information;
- a carriage configured to move an image reading position of said exposure optical system for reading said shading plate;
- and
- a controller configured to move said carriage to position where said shading plate is disposed so as to perform a shading operation before reading the image of the original document,
- wherein, a case in which images of a plurality of original documents are read, said controller controls the device such that a switched background removal mode is set and the shading operation is performed before an image of a next original document is read when a background removal mode set for reading an image of a preceding original document is switched before the image of the next original document is read.
3 more elements
An image reading device, comprising:
- exposure optical means for reading an image of an original document conveyed on a platen at a fixed speed;
- shading plate means to be read by said exposure optical means for correcting a white level of the read image information;
- carriage means for moving an image reading position of said exposure optical means for reading said shading plate means;
- and
- control means for moving said carriage means to a position where said shading plate means is disposed so as to perform a shading operation before and after reading the image of the original document.
2 more elements
An image reading device, comprising:
- exposure optical means for reading an image of an original document conveyed on a platen at a fixed speed;
- shading plate means to be read by said exposure optical means for correcting a white level of the read image information;
- carriage means for moving an image reading position of said exposure optical means for reading said shading plate means;
- and
- control means for controlling said carriage means such that a shading operation is performed immediately after an image of a next original document is read without performing the shading operation before reading the image of the next original document when the shading operation is performed after an image of the original document is read.
2 more elements
An image reading device, comprising:
- exposure optical means for reading an image of an original document conveyed on a platen at a fixed speed;
- shading plate means to be read by said exposure optical means for correcting a white level of the read image information;
- carriage means for moving an image reading position of said exposure optical means for reading said shading plate means;
- and
- control means for moving said carriage means to a position where said shading plate means is disposed so as to perform a shading operation before reading the image of the original document,
- wherein, in a case in which of a plurality of original documents are read, said control means controls the device such that a switched image quality mode is set and the shading operation is performed before an image of a next original document is read when an image quality mode set for reading an image of a preceding original document is switched before the image of the next original document is read.
3 more elements
An image reading device, comprising:
- exposure optical means for reading an image of an original document conveyed on a platen at a fixed speed;
- shading plate means to be read by said exposure optical means for correcting a white level of the read image information;
- carriage means for moving an image reading position of said exposure optical means for reading said shading plate means;
- and
- control means for moving said carriage means to a position where said shading plate means is disposed so as to perform a shading operation before reading the image of the original document,
- wherein, in a case in which images of a plurality of original documents are read, said control means controls the device such that a switched background removal mode is set and the shading operation is performed before an image of a next original document is read when a background removal mode set for reading an image of a preceding original document is switched before the image of the next original document is read.
3 more elements
An image reading method, comprising steps of:
- reading images of a first original document and a second original document conveyed on a platen at a fixed speed by an exposure optical system;
- and
- performing a shading operation by reading a shading plate for correcting a white level of the read image information before and after reading the image of the first original document, and to not perform a further shading operation before reading the image of the second original document.
An image reading method, comprising steps of:
- reading an image of an original document conveyed on a platen at a fixed speed by an exposure optical system;
- and
- performing a shading operation by reading a shading plate for correcting a white level of the read image information immediately after an image of a next original document is read without performing the shading operation before reading the image of the next original document when the shading operation is performed after an image of the original document is read.
An image reading method, comprising steps of:
- reading an image of an original document conveyed on a platen at a fixed speed by an exposure optical system;
- performing a first shading operation by reading a shading plate for correcting a white level of the read image information;
- setting a switched image quality mode when an image quality mode set for reading an image of a preceding original document is switched before an image of a next one of a plurality of original documents is read;
- and
- performing a second shading operation.
2 more elements
An image reading method, comprising steps of:
- reading an image of an original document conveyed on a platen at a fixed speed by an exposure optical system;
- performing a first shading operation by reading a shading plate for correcting a white level of the read image information;
- setting a switched background removal mode when a background removal mode set for reading an image of a preceding original document is switched before an image of a next one of a plurality of original documents is read;
- and
- performing a second shading operation.
2 more elements
Dependencies are inferred from the claim text.