A multifunction peripheral includes a conveyance roller, a print engine, a scanner, and a controller. The controller is configured to perform: driving the conveyance roller to convey a recording medium and controlling the print engine to record, on the recording medium, a test image based on test image data with recording agent; after recording the test image, controlling the scanner to generate scan data of the test image recorded on the recording medium; after generating the scan data, extracting, based on the scan data and the test image data, stain data indicative of a stain caused by transfer of the recording agent from the conveyance roller to the recording medium; after extracting the stain data, generating correction data by removing the stain data from the scan data; and executing particular processing by using the correction data.

In an example implementation, a method of providing image registration information in a digital printing press includes imaging a printed page on an impression drum of a digital printing press, determining image registration information from printed content on the page, and displaying a graphical visualization of the image registration information on a user interface screen of the digital printing press.

In an example implementation, a method of providing image registration information in a digital printing press includes imaging a printed page on an impression drum of a digital printing press, determining image registration information from printed content on the page, and displaying a graphical visualization of the image registration information on a user interface screen of the digital printing press.

An example of printing calibration includes printing a calibration page having test patches, the test patches developed at a plurality of voltages of a binary ink developer. The test patches are measured to determine an indication of ink thickness of the patches and a calibration voltage is generated based on the indications of the ink thickness of the test patches.

A multifunction peripheral includes a conveyance roller, a print engine, a scanner, and a controller. The controller is configured to perform: driving the conveyance roller to convey a recording medium and controlling the print engine to record, on the recording medium, a test image based on test image data with recording agent; after recording the test image, controlling the scanner to generate scan data of the test image recorded on the recording medium; after generating the scan data, extracting, based on the scan data and the test image data, stain data indicative of a stain caused by transfer of the recording agent from the conveyance roller to the recording medium; after extracting the stain data, generating correction data by removing the stain data from the scan data; and executing particular processing by using the correction data.

An image forming apparatus includes an image forming unit, an adjustment unit configured to select a type of adjustment processing and execute the selected type of adjustment processing for the image forming unit, and a determination unit to determine an adjustment time based on the selected type of adjustment processing. The determination unit determines, in a case where the adjustment unit causes the image forming unit to stop the image forming operation for executing the selected type of adjustment processing in a downtime, a first adjustment time, and wherein the determination unit determines, in a case where the image forming unit has finished the image forming operation, a second adjustment time longer than the first adjustment time.

A color toner printer system that is configured to both over print in a single pass and under print in a single pass, and that is configured to switch between over and under printing, the system comprising: a color toner printer comprising at least four toner printing cartridge slots, a front slot, a second slot, a third slot, and a rear slot, which are configured to matingly engage with at least four toner printing cartridges comprising three color toner printing cartridges and a non-standard toner printing cartridge; and a raster image processor software. The color toner printer is configured to over print when the non-standard toner printing cartridge is in said rear slot, and to under print when the non-standard toner printing cartridge is in said front slot. The RIP software is configured to (1) remap the color toner printer to reflect an actual placement of the at least four toner printing cartridges and (2) allows said color toner printer to under print in a single pass or over print in a single pass.

A color toner printer system that is configured to both over print in a single pass and under print in a single pass, and that is configured to switch between over and under printing, the system comprising: a color toner printer comprising at least four toner printing cartridge slots, a front slot, a second slot, a third slot, and a rear slot, which are configured to matingly engage with at least four toner printing cartridges comprising three color toner printing cartridges and a non-standard toner printing cartridge; and a raster image processor software. The color toner printer is configured to over print when the non-standard toner printing cartridge is in said rear slot, and to under print when the non-standard toner printing cartridge is in said front slot. The RIP software is configured to (1) remap the color toner printer to reflect an actual placement of the at least four toner printing cartridges and (2) allows said color toner printer to under print in a single pass or over print in a single pass.

An image forming apparatus comprising: an exposing unit including: a first light source comprising a first light emitter and a first light receiver including a first electric output responsive to a received light quantity of the first light emitter; a second light source comprising a second light emitter and a second light receiver including a second electric output responsive to a received light quantity of the second light emitter; and a first light-source driver electrically connected to the first light source and the second light source. The first light-source driver includes: a first output terminal electrically connected to the first light emitter; a second output terminal electrically connected to the second light emitter; and an input terminal electrically connected to both the first electric output and the second electric output.

An image forming apparatus, including: an image forming unit configured to form an image; an adjustment unit configured to select a type of adjustment processing, and execute the selected type of adjustment processing for the image forming unit; and a determination unit configured to determine an adjustment time based on the selected type of adjustment processing, wherein the determination unit determines, in a case where the adjustment unit causes the image forming unit to stop the image forming operation for executing the selected type of adjustment processing in a downtime, a first adjustment time, and wherein the determination unit determines, in a case where the image forming unit has finished the image forming operation, a second adjustment time longer than the first adjustment time.