An image processing apparatus includes a processing unit that converts first input image data for a first region and second input image data for a second region to reduce a difference between first region recorded image density and second region recorded image density, and generates dot position data of a dot to be generated in each of the first and second regions based on the dot data after the conversion processing. The acquisition unit acquires edge information indicating a first object pixel edge of an image pixel for the first region and a second object pixel edge of an image pixel for the second region. Based on the acquired edge information, conversion and generation processing are performed in such a manner that a color signal of an edge pixel is increased/reduced to a degree lower than a degree to which a color signal of a non-edge object pixel is increased/reduced.

The ink jet recording method using an ink jet recording apparatus including: a first ink and a second ink; and a recording head including a plurality of recording element substrates in which a first ejection orifice array for ejecting the first ink and a second ejection orifice array for ejecting the second ink are sequentially arranged in a predetermined direction, wherein the plurality of recording element substrates are arranged to be adjacent to each other in a predetermined direction, includes: a recording step of ejecting the ink from the recording head disposed so that an angle formed between the ejection orifice surface of the recording head and the direction of gravity is 0 or more to less than 90 to record an image on the recording medium, wherein a brightness of the first ink is lower than a brightness of the second ink.

To allow printing through a more appropriate method when carrying out printing using a two-liquid type ink. A fixing agent amount setting method of setting a usage amount of a fixing agent, which is liquid for fixing an ink, which is a colored ink, on a medium, where a fixing agent density, which is an amount of the fixing agent to eject per unit area is made to correspond with a colored ink density, which is an amount of the ink to eject per unit area, and set to a value smaller than or equal to an upper limit value of a fixing agent density corresponding to a maximum fixing agent density at which color unevenness does not occur on the medium.

A printing apparatus includes a print head, a processor, and a drying mechanism. The print head ejects ink onto a printing medium located in a printing region to form an image. The processor is configured to control a duty that is an amount of ink ejected by the print head onto the printing medium per unit area. The drying mechanism includes a transport unit that transports the printing medium in a first direction and a heater that heats the printing medium. The drying mechanism is configured to dry the printing medium having the image formed thereon by the print head, by transporting, using the transport unit, the printing medium to a drying region in which the printing medium is dried by the heater. The processor controls drying of the printing medium performed by the drying mechanism in accordance with the duty.

A recording device provides, when a first mode that is a recording mode for increasing concentration of black is selected, in a first nozzle row including first nozzles capable of discharging a first ink representing black by a single color or a mixed color, and a second nozzle row including second nozzles capable of discharging a second ink having a lower pigment concentration than a black ink and being an achromatic color, a nozzle unused region by a first nozzle not discharging a first ink and a second nozzle not discharging a second ink, between a first nozzle usage region including the first nozzle discharging the first ink onto the recording medium, and a second nozzle used region including the second nozzle for discharging the second ink onto a region of the recording medium onto which the first ink is discharged.

The spectral colorimetry apparatus includes an LED, a diffraction grating; a line sensor that has multiple pixels and that receives light dispersed by the diffraction grating at the multiple pixels for respective wavelengths of the dispersed light and outputs voltages according to the intensity of the received light; and a sensor CPU that calculates spectral reflectivity of an object based on the intensity of light reflected from the object. The sensor CPU varies, with the multiple pixels, the number of detection times of detecting the light reflected from the object at each pixel.

An image forming apparatus includes: a nozzle head in which nozzles that form dots on a recording medium by ejecting ink onto the recording medium are arranged in a row in a first direction; a moving mechanism that moves at least one of the recording medium or the nozzle head relative to another in a second direction intersecting the first direction; an image acquirer that acquires image data for forming an image of dots on the recording medium; and a halftone processor that determines whether to form a dot at each pixel position of the image on the basis of the image data, wherein the halftone processor includes: an n-value processor; a grouping processor; a total value calculator; and a rearrangement processor.

An object of the present disclosure is to reduce density unevenness and streaks of an image that is printed in a case where it is not possible to implement sufficient correction only by the correction for a defective nozzle. One embodiment of the present invention is an image processing apparatus that performs processing for an input image for an image forming apparatus performing printing on a printing medium by using a print head in which a plurality of printing elements is arrayed, the image processing apparatus including: a storage unit configured to store density characteristic information indicating an output density for each tone for each of the printing elements; a target value acquisition unit configured to acquire a target characteristic indicating a target value for each tone; and a first correction unit configured to correct the input image based on the density characteristic information and the target value.

A printing control apparatus configured to control a printing apparatus including an acquisition unit configured to acquire discharge characteristic information including a characteristic of discharging ink for each of nozzles, a correction amount calculation unit configured to calculate a correction amount for correcting an amount of the ink discharged onto a printing medium based on the discharge characteristic information for each of printing modes having mutually different relative movement amounts of the sub scanning movements, and a printing data generation unit configured to generate printing data for executing printing in accordance with the printing mode based on the correction amount.

A method for locally adjusting the glossiness of a printed image includes printing an image onto a recording medium in multiple swaths and locally adjusting the ink volume for each swath. A printer for printing an image onto a recording medium includes a control unit configured to perform the method.