A conveying device includes a sheet feeder that feeds a recording medium unreeled from a roll, a conveying roller that conveys the recording medium, and circuitry. The circuitry is to obtain a plurality of actual conveyance amounts each of which is a conveyance amount of the recording medium actually conveyed by the conveying roller at a time, calculate an adjustment value based on a difference between a target conveyance amount and each of the plurality of actual conveyance amounts to obtain a plurality of adjustment values, calculate an approximate line based on a plurality of adjustment points in a two-dimensional coordinate plane determined by the adjustment value and a diameter of the roll, specify an adjustment value corresponding to a current diameter of the roll based on the approximate line, and correct, based on the specified adjustment value, a conveyance amount by which the conveying roller conveys the recording medium.

A recording control device that controls a recording device that discharges a dot to perform recording includes an edge detection unit configured to detect an edge of an image represented by image data, and a recording control unit configured to generate dot data specifying the dot based on the image data and to cause the recording device to perform recording based on the dot data. The recording control unit causes an internal region, located on an inner side of an edge region including the edge of the image, to be recorded using a dot having a smaller size than that of a dot used for recording of the edge region, or to be dot-off.

A printing apparatus, having a plurality of heads, a plurality of head controlling circuits, a master transmitter, and a determining unit, is provided. The head controlling circuits are connected to the heads in one-to-one correspondence and are connected with one another serially. Each head controlling circuit controls a corresponding one of the heads to record a part of the image based on master data. The master transmitter transmits the master data to a most upstream one of the head controlling circuits. The head controlling circuits are configured to pass the master data received by the most upstream one of the head controlling circuits serially downstream onto a most downstream one of the head controlling circuits, and generate differential data indicating a difference between the master data and read data generated by reading an image. The determining unit determines whether the image contains a defect based on the differential data.

An image processing apparatus includes a judgment unit configured to judge whether a barcode is included in the obtained image data for each piece of band data corresponding to a region printable by scanning a printing unit including a plurality of printing elements once, the barcode being formed of a region in which bars are arranged side-by-side in a direction in which the printing unit is scanned over a printing medium, and a determination unit configured to determine that the number of times to perform scanning for completing printing the piece of band data judged as not including the barcode by the judgment unit is a first number of times, and that the number of times to perform scanning for completing printing the piece of band data judged as including the barcode by the judgment unit is a second number of times larger than the first number of times.

The inkjet printing apparatus is configured to be able to execute a batch adjustment process of performing a plurality of times of adjustment processes related to printing in succession based on one instruction from an outside. The conveyance control unit maintains the conveyance speed at a first speed in a period when a chart printing process is performed and a period when a chart imaging process is performed. The conveyance control unit decreases the conveyance speed from the first speed to the second speed after the end of the chart imaging process in an adjustment process except for an adjustment process that is performed last in the batch adjustment process, and increases the conveyance speed from the second speed to the first speed before the start of the chart printing process in an adjustment process that is performed next.

An image processing apparatus converts, based on a threshold matrix in which thresholds are arrayed, input image data into a first dot pattern representing dots recorded by a recording head, and obtains a second dot pattern representing dots recorded by each of L number of the nozzle arrays by assigning the dots of the first dot pattern to each of the nozzle arrays so that each nozzle of the recording head is used in a cycle of L. A power spectrum in a frequency domain of the first dot pattern has a blue noise characteristic or a green noise characteristic in which power in a low frequency band is suppressed, and power is suppressed at a frequency corresponding to the cycle of L and at frequencies of multiplications of the frequency.

A method for color mapping is disclosed based on obtaining a measurement of one or more characteristics of an imaging system. A set of color mappings are provided and the color mapping is selected based on the measurement. Each of the color mappings enables a mapping from a first color space to Neugebauer Primary area coverage vector space. A method for generating a color mapping is disclosed.

To generate a dot pattern whose deterioration of a feeling of granularity, density unevenness, and streaks are unlikely to be recognized visually by more effectively suppressing a change of an overlap of ink droplets on a printing medium. Halftone image data representing a dot pattern of each of two or more kinds of dot different in density reproduction is acquired. Then, in a case where there is a possibility that the contact state between dots changes due to a landed-dot shift of ink in a plurality of specific dots on a condition that dots are formed in accordance with a dot pattern in the halftone image data, the plurality of specific dots is replaced with dots of another kind whose number is less than or equal to that of the plurality of specific dots.

An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.

An example printing device includes a memory to store data to print to a print media, a page pick mechanism to pick a page of the print media from a print media source, and a controller connected to the memory and the page pick mechanism. The controller is to control a timing of the page pick mechanism to pick a next page of print media based on a quantification of the data in the memory for a current page.