An image forming device which forms an image for color correction in the margin of a continuous recording medium such as continuous paper as appropriate without causing erroneous detection by a mark sensor at a post-processing stage. In the image forming device, a printing data generator (control section) performs: acquiring a detection criterion to detect a post-processing image for use at the post-processing stage; creating a color correction image to be used for color correction of an original image according to the detection criterion; and arranging the color correction image as an outer area image in an area other than an original image formation area in printing data.

An image forming apparatus, including: a dividing the image data into regions including pixels; an obtaining a first ratio by dividing a total number of the pixels included in groups, the pixels having a density equal to or higher than a predetermined value and arranged consecutively in a predetermined direction, by a total number of the pixels having the density and included in each of the regions; an obtaining a second ratio by dividing the total number of pixels having the density and included in each of the regions by a total number of the pixels included in each of the regions; a determining a target temperature for maintaining a temperature of a fixing portion based on the first and second ratios; and a controlling power to be supplied to the fixing portion so that the fixing portion is maintained at the target temperature.

An image forming apparatus includes an image forming section, a receiving section, and a controller. The image forming section forms a plurality of images on a plurality of sheets. The receiving section receives a print job including a layout format indicating a layout of the images on the sheets. The controller controls the image forming section based on the print job. Each of the images indicates an image expressed by image data of a single page. The print job includes an instruction to form the images on the sheets according to a plurality of mutually different layout formats.

There is provided an image forming apparatus for performing printing in a plurality of colors. The image forming apparatus includes processing circuitry. The processing circuitry is configured to receive first print data in which an object to be printed in a spot color is designated in a first area in a document to be printed and second print data of the document to be printed from an information processing apparatus; convert the second print data received by the communication unit into image data of a predetermined color; extract an image of the first area from the image data obtained by conversion of the drawing unit; convert the image of the first area extracted by the spot color image control unit into the spot color; and generate image data of the spot color in which the image of the first area converted by the conversion unit is placed.

A printer includes a first printing unit responsible for one of preceding printing and subsequent printing that are to be performed on one sheet in overprinting, an other of the preceding printing and the subsequent printing being performed by a second printing unit; and a base-printing controller that causes the first printing unit to print a base for printing by the second printing unit in an operation of forming a test pattern for registration between the preceding printing and the subsequent printing on the sheet.

An image forming apparatus that utilizes a communication device is disclosed. A communication unit of a housing which corresponds to an antenna portion is provided at a position at which the communication unit can be seen without obstruction from the upper side. A communication device such as a smartphone can be brought close to or into contact with the communication unit readily. Accordingly, wireless communication between the antenna portion and the communication device can be established.

In an image-forming apparatus, a fixing device includes first and second fixing members; and a pressure modifying mechanism. The first and second fixing members form a nip. The pressure modifying mechanism modifies a nip pressure at the nip to one of a first nip pressure and a second nip pressure smaller than the first nip pressure. A controller performs: a converting process to convert print data into raster image data; an image-forming process to form a developer image on a sheet using the raster image data; and a fixing process to fix the developer image to the sheet with the fixing device at the first nip pressure. When a second converting process is not completed before a prescribed time following completion of a first fixing process has elapsed, the controller further performs a nip pressure reducing process to modify the nip pressure from the first to the second nip pressure.

An image forming apparatus including: a light source configured to emit a light beam based on an image signal; a deflector configured to deflect the light beam so that the light beam emitted from the light source is scanned on a surface of a photosensitive member in a main scanning direction; a storage portion configured to store a first magnification of an image with respect to a scanning position in the main scanning direction; and a controller configured to generate a second magnification of the image with respect to a reference color image, wherein the controller generates a third magnification based on the first magnification corrected based on the second magnification and the second magnification to correct the image signal based on the third magnification.

Whether there exists a side area image within side areas of the recording medium is determined. When it is determined that there exists no image within the side areas, a command is transmitted to a printer. The command causes a printer to start conveying of the recording medium at an earlier timing. The side areas of the recording medium are difficult to be heated by a heater arranged at a central portion of a fixing roller. Therefore, in order to heat the side areas, a long time for heating by the heater is necessary. When there is no image within the side areas, the heating time is shortened. Thereby, it is possible to start conveying the recording medium at an early timing, and a time period for completing a printing operation can be shortened.

Downtime relating to formation and detection of a detection image is reduced. An image forming apparatus includes a controller configured to calculate a first conversion unit to convert a gradation of input image data so that density output for the input image data becomes a first density output characteristic based on a first detection result of the detection image detected by a density sensor in a first mode. The controller generates a second conversion unit to convert the gradation of the input image data so that the density output for the input image data becomes a second density output characteristic in a second mode based on the detection result in the first mode and correction information, and further updates the correction information based on a second detection result of the detection image detected by the density sensor in the second mode and the first detection result.