An image forming apparatus includes: an image processor configured to perform first image processing on image data having a first resolution and to add tag data to a target pixel where second image processing is to be performed; a resolution converter configured to convert the image data into image data having a second resolution higher than the first resolution, and to perform the second image processing based on arrangement of the image data having the first resolution and the tag data; a pulse generator configured to generate an on-off modulation signal and an application-current switching signal in accordance with the image data having undergone the second image processing; and a light source driver configured to drive the light source in accordance with a current setting value output from an application current setter depending on the application-current switching signal and the on-off modulation signal.

An image processing apparatus comprises an input interface, a light source unit, a reading unit and a control unit. The input interface receives an input reading condition. The light source unit comprises a plurality of light sources which emit lights of different wavelengths. The reading unit reads an image on a sheet irradiated by the light of the light source unit. The control unit separately controls the quantity of the light emitted from each light source according to the reading condition input from the input interface.

A resolution of an image data needs to be higher than a predetermined value for character recognition. A control method in an image reading apparatus having a reading unit for reading an image of a document to generate image data, and a storing unit for storing the image data generated by the reading unit includes receiving from a user, after the image data is stored by the storing unit, an instruction for executing character recognition processing on the image data stored by the storing unit, executing character recognition processing on the image data stored by the storing unit according to a reception of the instruction by the receiving unit, and performing control, in a case where the image data generated by the reading unit is to be stored by the storing unit, to read an image of a document by the reading unit with a resolution that enables character recognition.

A method of printing a document using one of a plurality of print modes, the method comprising: (i) notionally dividing a digital image of the document into sectors; (ii) for each sector, comparing one or more properties of the luminosity of pixels within each sector with one or more threshold values; (iii) using the comparison of (ii) to determine whether each sector is likely to show an image defect if printed at a lower image quality print mode; (iv) selecting a print mode such that all sectors are determined not to be likely to show an image defect; (v) printing the document using the determined print mode.

An image processing apparatus, which has an input unit configured to input image data and which is communicably connected to an external apparatus via a network, includes an obtaining unit configured to obtain a document with a predetermined form that includes a request for input of image data, via the network from the external apparatus; a display unit configured to display, in the event of displaying a screen corresponding to the document obtained by the obtaining unit, a screen including a display object based on the predetermined form, the display object to instruct inputting of image data by the input unit; a determining unit configured to determine whether or not to display the display object on the display unit; and a control unit configured to control the display of the display object by the display unit, according to determination results of the determining unit.

A reading device includes a conveyance control section for controlling document conveyance. In a case of double-sided reading of a document and with a cutout document mode applied, the conveyance control section stops a pair of reverse-rotation rollers at a time point when the document has been conveyed to a distance resulting from adding an additional distance, which is predetermined or determined based on a recognized cutout width in the document conveyance direction, to a reference distance since a time point of passage of a rear end of a document-detecting detection part, and thereafter start reverse rotation of the pair of reverse-rotation rollers.

An image processing apparatus comprises an input interface, a light source unit, a reading unit and a control unit. The input interface receives an input reading condition. The light source unit comprises a plurality of light sources which emit lights of different wavelengths. The reading unit reads an image on a sheet irradiated by the light of the light source unit. The control unit separately controls the quantity of the light emitted from each light source according to the reading condition input from the input interface.

It is possible to read a document at an optimal speed according to an operation mode selected by a user while improving productivity at a low cost, without forcing the user to perform a complicated operation for changing a document reading speed. A method for controlling a reading unit to read a document with a first reading resolution in a case where a reading resolution is the first reading resolution, to read a document with a second reading resolution in a case where the reading resolution is the second reading resolution smaller than the first reading resolution and a predetermined mode is not set, and to read a document with the first reading resolution in a case where the reading resolution is the second reading resolution smaller than the first reading resolution and the predetermined mode is set.

One scanner taught in the present specification may be provided with a processor and a memory that stores computer-readable instructions. The computer-readable instructions, when executed by the processor, may cause the scanner to perform: obtaining a scan request from a terminal device; determining a target scan resolution based on software-related information included in the scan request; generating scan image data having the target scan resolution; and supplying the scan image data to the terminal device. The software-related information is information relating to a software installed in the terminal device and used by the terminal device for supplying the scan request to the scanner.

An image reading apparatus includes an image reader that includes a line sensor to read a reading object line by line, and circuitry. The image reader reads the reading object at a first resolution and generates image data having the first resolution, and circuitry converts the image data having the first resolution into image data having a second resolution lower than the first resolution and outputs the image data having the second resolution. An exposure time per line is shorter when the reading object is read at the first resolution than when the reading object is read at the second resolution.