Abstract: The image reading device includes a scanner, a controller, and storage. The controller replicates first original image data specified by a replication instruction among the original image data stored in the storage to generate second original image data and stores information indicating a replication destination of the first original image data in the storage. Upon acquiring third original image data that is original image data from an image of an original document that is newly read by the scanner, the controller determines whether or not original document data volume indicating volume of the third original image data is greater than available capacity of the storage. Upon determining that the original document data volume is greater than the available capacity, the controller deletes one or more parts of the first original image data for which the replication destination information fulfills a predetermined condition from the storage.

Abstract: To specify the position of a crease on a document without necessitating an additional configuration, such as a new sensor and a reading angle switching mechanism. An image reading apparatus including: a light emission controlling unit controlling light emission patterns of a first light emitting unit and a second light emitting unit included in a image reading unit; and a determining unit performing determination relating to a crease produced on a document by comparing a first image obtained by reading the document in a first light emission pattern and a second image obtained by reading the document in a second light emission pattern; and wherein the second light emission pattern is different from the first light emission pattern in balance of a quantity of emitted light from the upstream side of a light receiving unit and a quantity of emitted light from the downstream side of the light receiving unit.

Abstract: Methods of measuring colors, methods of calibrating printers and printing systems for implementing the methods are disclosed. Calibration maps are printed on print media. The calibration maps have intertwined contiguous printed and non-printed areas. One or more color signals are measured on contiguous printed areas. One or more noise signals are measured on non-printed areas that are adjacent to the contiguous printed areas. Clear color signals are generated by removing the one or more measured noise signals from the one or more measured color signals.

Abstract: In an example, a method includes identifying, within data for use in printing, a first element set associated with a first print addressable area. The first element set may include at least one element, and each element of the set may be associated with a print material or print material combination. An element may be selected from the first element set and assigned to the first print addressable area. A second print addressable area may be identified as a candidate print addressable area for error diffusion, the second print addressable area being associated with a second element set. Any common elements of the first element set and the second element set may be identified and, if at least one common element is identified, an error associated with the selection of the element from the first element set may be diffused to the at least one common element.

Abstract: Disclosed is a facsimile communication device, including: a line voltmeter that measures a voltage of a line used for a facsimile communication; and a hardware processor that: detects a predetermined change in the voltage of the line, in the facsimile communication; and judges whether a facsimile device of an opposite side opens the line or not according to whether the predetermined change is detected.

Abstract: Provided is an image processing device used for image processing in an image forming device that executes linear image forming in a first direction repeatedly in a second direction orthogonal to the first direction and executes two-dimensional image forming on a recording medium, the image processing device including: a processor configured to: acquire a phase of a member that contributes to image forming by rotating or circulating in the second direction and calculate, for each of different phases, an input/output gradation characteristic indicating a correspondence relationship in density in the same pixels in pre-output image data and post-output image data acquired by scanning of an image formed on the recording medium; calculates correction data to solve a difference between the input/output gradation characteristic in each of the phases and a reference input/output gradation characteristic; and correct the pre-output image data with the correction data of each of the phases.

Abstract: A method for selecting a colorant amount for printing is described in which a maximum optical density of an image is identified. The maximum optical density is compared to with a threshold optical density, and when the threshold is exceeded, dot cluster sizes from a first lookup table are selected, otherwise, dot cluster sizes from a second lookup table are selected. A colorant thickness corresponding to the selected dot cluster sizes is selected for printing the image.

Abstract: In an example implementation, a method of rosette-free printing includes, in a printing device whose color plane misregistration is less than 15 percent of a screen ruling of a halftone screen, printing multiple color planes of a multicolor image using the halftone screen.

Abstract: A halftone comprises a first halftone screen and a second halftone screen. The first halftone screen comprises a first plurality of amplitude modulated dots arranged according to a first plurality of rows, the first plurality of rows being orientated according to a first direction and comprising a first dot spacing. The second halftone screen comprises a second plurality of amplitude modulated dots arranged according to a second plurality of rows, the second plurality of row being orientated in a second direction and comprising a second dot spacing. The first direction and the second direction define an angle of 45 degrees or less and a ratio of the second dot spacing to the first dot spacing is less than one.

Abstract: This disclosure is directed to systems and methods for the delivery and maintenance of faxes where the faxes may remain at a faxing system for a minimal amount of time. The faxing system may send a queued fax to a connector responsive to a request from the connector to pull or retrieve a fax. The connector is configured to send a release notification to the faxing system after the fax is received. The faxing system is configured to delete the queued fax as soon as confirmation of the delivery of the fax can be determined or when an expiration time has elapsed.

Abstract: A printer includes a spectrometer which is relatively movable between media having a front surface of the media and a rear surface of the media which is opposite to the first surface and a platen which holds the second surface of the media. The platen includes a plurality of light transmitting units transmitting light.

Abstract: An image forming apparatus includes an image obtaining unit, a copy number obtaining unit, a set value obtaining unit, a set value applying unit, and a print performing unit. When the set value obtaining unit obtains and stores a plurality of different set values, the set value applying unit applies the plurality of respective set values to the image obtained by the image obtaining unit to generate and store a plurality of different set value applied images, and the specific count of copies of the plurality of respective set value applied images are printed, the print performing unit printing any one set value applied image among the plurality of stored set value applied images. A count of copies of the printing of the one set value applied image is found by subtracting the specific count of copies from the count of print copies.

Abstract: An image scanning apparatus includes a controller configured to execute a first operation of checking whether a standby position is coincident with a home position in response to determining that an open signal is not output from a cover sensor while an image scanner is changing a scanning position from a scanning end position toward a scanning start position after completion of image scanning, and to execute a second operation in response to determining that the open signal is output from the cover sensor while the image scanner is changing the scanning position, the second operation including moving the scanning position to a particular position between the standby position and the scanning end position, without executing the first operation.

Abstract: A roll-fed printing apparatus and a method for controlling a roll-fed printing apparatus for printing images on at least one recording medium from an image queue. A part of the image queue is saved. The part comprises the ripped images at established arbitrary positions on the roll of medium and events according to a plurality of event image objects placed in the image queue into a roll file which is stored in a history roll queue storage of the controller. At least part of the ripped images saved in the roll file are reprinted on a new roll of medium having a same roll width as the arbitrary roll width according to a sequence order and the arbitrary positions saved in the roll file. During reprinting, the corresponding events saved in the roll file are executed.

Abstract: In one example, a document scanner having a document-receiving platen. The platen includes a plurality of alignment patterns disposed on the platen at known positions in a coordinate system. The scanner includes overlapping staggered scan bars disposed adjacent the platen, each scan bar fixed at a position to image a one-dimensional slice of a corresponding one of the alignment patterns. The scanner further includes a controller to determine, from the imaged slice, X and Y coordinates of each corresponding scan bar within the coordinate system.

Abstract: A method for compensating tone value fluctuation in inkjet printing includes generating multi-bit halftone images of pixels on a computer during prepress screening for color separations with multiple tone values out of print image data, forwarding multi-bit halftone images to a control unit of an inkjet printing machine, and printing the multi-bit halftone on the machine, wherein encoded binary values of multi-bit halftone images correspond to ink drop sizes to be generated by the machine. The computer introduces additional binary values of multi-bit halftone images not corresponding to ink drop sizes in pixel positions of multi-bit halftone images where occurring tone value fluctuations are to be compensated for by modified ink drop sizes, causing additional binary values to be ignored by the machine in a regular print mode, and assigning additional binary values to modified ink drop sizes in a correction print mode.

Abstract: An image is rendered on a display having a limited number of primary colors by (104) combining input data representing the color of a pixel to be rendered with error data to form modified input data, determining in a color space the simplex (208—typically a tetrahedron) enclosing the modified input data and the primary colors associated with the simplex, converting (210) the modified image data to barycentric coordinates based upon the primary colors associated with the simplex and (212) setting output data to the primary having the largest barycentric coordinate, calculating (214) the difference between the modified input data and the output data for the pixel, thus generating error data, applying (106) this error data to at least one later-rendered pixel, and applying the output data to the display and thus rendering the image on the display. Apparatus and computer-storage media for carrying out this process are also provided.

Abstract: A printer includes: an inline scanner which acquires an RGB value of each patch of a color chart; an inline colorimeter which acquires a colorimetric value of each patch of the color chart; a profile creation unit which creates a profile for associating the RGB value with the colorimetric value of each patch; and a color conversion unit which estimates a colorimetric value corresponding to an RGB value of input data by extrapolation calculation using four points including three points forming a plane and one supporting point in data of the profile, wherein the color conversion unit estimates the colorimetric value corresponding to the RGB value based on a set of four points remained after deleting one or a plurality of sets of four points according to a predetermined rule from a plurality of sets of four points selected for an RGB value input.

Abstract: An image processing apparatus includes a controller configured to control an image scanner to scan a document sheet and generate target image data, generate an original histogram of an index value representing a luminance of each pixel forming the target image data, determine whether a particular condition is satisfied that includes a requirement that a difference value between an orientation of the document sheet and a reference orientation in the image scanning process is equal to or larger than a particular value, when the particular condition is satisfied, calculating a count of out-of-document pixels other than pixels representing an image of the document sheet, generate an adjusted histogram by subtracting at least a part of the count of the out-of-document pixels from frequencies of index values within a particular range in the original histogram, setting a specific threshold of the index value for binarization processing, based on the adjusted histogram.

Abstract: The invention backups job data, and detects and predicts the occurrence of trouble in a storage device. A gateway registers job data registered in a HDD and vibration-detection information of a vibration-detection sensor received from a user terminal in a memory, and then transmits the job data to a MFP. The MFP registers the job data in a HDD, and according to a request from the gateway, transmits the job data registered in the HDD and vibration-detection information of a vibration-detection sensor to the gateway. The gateway compares the data amount of when the job data is registered in the memory and the data amount of the job data from the gateway, and when there is a difference, registers trouble information related to the HDD in the memory.