An image processing apparatus includes a first detection unit and a second detection unit. The first detection unit detects a rectangular shape in an image including plural document images. The second detection unit detects, in a case where a background of the rectangular shape is not white, rectangular shapes included in the rectangular shape detected by the first detection unit as document images.

Methods, apparatus, systems and articles of manufacture are disclosed for providing print dimensions from a printer. An example method includes analyzing a first roll of a printer, the first roll holding first paper having a first width; determining, via a processor of the printer, a first print dimension of the first paper on the first roll based on the first width; and providing the first print dimension to an electronic device, the electronic device to use the first print dimension to determine whether content is to be clipped when printed on the first paper.

An image forming apparatus includes: an image former that performs image forming processing to a plurality of sheets included in each of a plurality of sheet groups; and a hardware processor that detects occurrence of a jam, wherein the image former completes the image forming processing to each of the plurality of sheets included in a sheet group not including a jammed sheet that has generated the jam.

Provided are a non-transitory computer-readable storage medium storing a control program for creating a database for use in color calibration and that storing a control program for a judgement based on the database. The control programs cause a computing device to perform the following operations. The database-creating operations include calculating a white-ground color difference using a print medium, and repeating a feedback adjustment of a color correction LUT, to obtain a resulting color accuracy. The operations further include obtaining white-ground color differences and resulting color accuracies for plural paper products of a certain print medium type, to obtain a mathematical relation and create a database. The judgement operations include using the database to calculate an estimated resulting color accuracy from a white-ground color difference calculated using a print medium, and judging whether to perform a feedback adjustment of a color correction LUT based on the estimated resulting color accuracy.

An image reading apparatus that makes it possible to reduce the influences of dirt on a white reference chart itself, stripes caused by dust, and the like, and thereby generate accurate data for shading correction. An image processor performs shading correction on image data read by a reader unit. The read image data is compared with threshold values set for each pixel, and a pixel which is out of a range of the threshold values is determined as a singular point pixel. Data of a pixel determined as a singular point pixel is interpolated from data around the singular point pixel. Data of a pixel which is not determined as a singular point pixel is adopted as valid shading correction data. An operation controller controls the number of effective sampling lines from start to termination of sampling to be performed.

An image forming system including a printer that forms an image on a sheet and an inspection apparatus that inspects an image on a sheet delivered from the printer. A discharge mode for discharging a sheet inspected by the inspection apparatus and binding processing for binding a plurality of sheets as one bundle are set on a console panel. In a case where a first mode for discharging a first sheet determined as normal by the inspection apparatus to a first discharge destination, discharging a second sheet determined as defective by the inspection apparatus to a second discharge destination different from the first discharge destination, and discharging a third sheet conveyed subsequently to the second sheet, determined as normal by the inspection apparatus, to the first discharge destination is set as the discharge mode, and the binding processing is set, execution of the corresponding job is stopped.

An image processing apparatus generates image data used in printing an image on a sheet being attachable to skin. The image processing apparatus includes: an image acquirer that acquires a skin image picked up from the skin; an image analyzer that extracts, from the skin image, a discolored region differing in color from surrounding skin by at least a predetermined level, and surrounding color being color of the skin surrounding the discolored region; a grouping processor that groups a plurality of the discolored regions, and determines an inclusive region for each region group which is a cluster of the grouped plurality of discolored regions or one discolored region not having been grouped, to include the one or a plurality of the region groups; and a printing controller that generates image data having a content of printing a pigment material that causes color of the inclusive region to approximate the surrounding color, on a region corresponding to the inclusive region in the sheet.

An image reading apparatus includes an image data obtaining unit, a foreign material position information obtaining unit, and a separation processor. The image data obtaining unit obtains image data read from a document passing over a read area. The foreign material position information obtaining unit obtains foreign material position information read from the read area in which the document is not present. The separation processor separates the image data into plural objects including a background object, detects, by using the foreign material position information, a streak image portion caused by foreign material in the read area and included in the image data, and assumes a pixel of the streak image portion to belong to the background object if the pixel is present in the background object and has a pixel value equal to or smaller than a threshold determined in accordance with a representative value of the background.

An image processing apparatus includes a control unit configured to control execution of monochromatic calibration and multi-color calibration, and a registration unit configured to register paper types of paper to be used at time of execution of the monochromatic calibration, a monochromatic target value set for each of the paper types used for the monochromatic calibration, paper types of paper to be used at time of execution of multi-color calibration, and a multi-color target value set for each of the paper types used for the multi-color calibration. The image processing apparatus executes the multi-color calibration, after executing the monochromatic calibration, via the control unit by using paper of a paper type selected from common paper types out of the registered paper types and the monochromatic target value and the multi-color target value set for the selected paper type.

An image reading apparatus includes an original table on which an original is to be placed, an original pressing member configured to press the placed original toward the original table, a reading unit configured to read light reflected from the original in a plurality of colors while irradiating the original placed on the original table with light and moving a reading position in a predetermined direction, and a storage unit configured to store color data of the original pressing member. The image reading apparatus determines whether or not the original is protruding from the original table based on output values of the plurality of colors, which are read by the reading unit in a region outside a maximum standard size of the original in a direction intersecting with a direction in which the reading unit is moved, and on the color data of the original pressing member.