The present invention relates to a method of generating “expanded color chart” representing various ink combination, for profiling a multi-color printing device or printer, using “reduced set of color chart”, printed using the printer, where a. The expanded color chart is computed by applying “Error Correction” function to the expanded color chart predicted using a theoretical model of color prediction for a given ink combinations in the expanded chart. b. Error Correction function is computed/modelled as function of the variance/difference observed between the color values predicted by the theoretical model and the actual values measured for the ink combinations in the printed “reduced set of color chart”.

An image processing apparatus for converting color data into gray data extracts an object included in the color data in a page, and determines, based on color information and position information on a first object and a second object extracted, whether at least one of the first object and the second object is to be a target of conversion of a color value of the color data into a gray value with improved discriminability. The image processing apparatus controls to convert the color value of the object into a gray value by a conversion targeting all color values, or into a gray value with the improved discriminability, based on the determination whether or not to be the target of conversion.

A spectral property acquisition apparatus includes: a first conveying device to convey an object in predetermined conveying direction; a color data acquisition device including a plurality of spectroscopic sensors in the conveying direction, the plurality of spectroscopic sensors receive light emitted and reflected by the object to acquire color data on the object; a second conveying device to convey the color data acquisition device in a direction orthogonal to the conveying direction; and circuitry to estimate a spectral property of the object based on the color data. The circuitry controls the first conveying device so as to generate predetermined tension for the object in a color data acquisition area in which the color data on the object is acquired.

In some examples, a system compares information of a color profile for an imaging device to color information relating to a type of substrate on which an image is to be formed. Based on the comparing, the system determines a mismatch between the color profile and the type of substrate. The system initiates a remedial action to address the mismatch.

An image forming system may comprises an image forming unit, a sensor, and a controller. The controller configured to control the sensor based on measurement modes including a first measurement mode and a second measurement mode. A sampling number of an image by the sensor while the sensor moves in the direction orthogonal to the conveying direction in the first measurement mode is less than a sampling number of an image by the sensor while the sensor moves in the direction orthogonal to the conveying direction in the second measurement mode.

An image processing apparatus according to the present invention includes an image forming unit configured to form an image, a measuring unit configured to measure the formed image, a control unit configured to control execution of a single-color calibration to be performed to correct reproduction characteristics of a single-color formed by the image forming unit based on a measuring result of a single-color image formed with a single-color recording agent and execution of a multi-color calibration to be performed to correct reproduction characteristics of a multi-color image formed by the image forming unit based on a measuring result of a multi-color formed with a plurality of recording agents, and a selection unit configured to select whether to cause the control unit to perform the multi-color calibration after completing the single-color calibration or cause the control unit to perform any one of the single-color calibration and the multi-color calibration.

An image reading apparatus includes an original tray on which an original is to be stacked; a conveyance unit configured to convey the original stacked on the original tray; a reading unit including a reading sensor having a light receiving element to receive light of a first color and a light receiving element to receive light of a second color that is different from the first color, wherein the reading unit is configured to read an image of the original conveyed by the conveyance unit by using the reading sensor to generate image data which represents a reading result of the reading unit; at least one processor configured to: determine a first abnormal position which is a position in a first direction of an abnormal pixel of the first color in the image represented by the image data, wherein, in the image represented by the image data.

An apparatus including: a forming unit configured to form a measurement image on a sheet; a fixing unit configured to fix the measurement image; a measurement unit provided downstream of the fixing unit in a sheet conveyance direction and configured to measure a color of the fixed measurement image; a detector configured to detect whether a cooling device having a cooling function valid is connected between the fixing unit and the measurement unit; and a controller configured to determine, in a case in which the color of the measurement image is measured, a time to be taken after the sheet has passed through the fixing unit until the measurement unit starts measuring the color of the measurement image based on a result of the detector, and to control sheet conveyance based on the determined time.

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 reading apparatus includes: a reader that reads an image formed on a print medium; and a backing part that is disposed at a position facing the reader and is capable of switching a color of a portion to be a background of the print medium upon reading by the reader to a plurality of colors according to a type of the print medium and/or a color read from the print medium.