Abstract: An image processing device has a main unit, a storage unit, a first processing unit, a second processing unit, a first determination unit, and a first replacement unit. The storage unit is provided in the main unit that stores a color image having ground color and different color from the ground color, the color image being formed by color-pixels including a ground color pixel and a different color pixel, the ground color pixel having the ground color, the different color pixel having the different color. The first processing unit scales down the color image to produce a first gray-scale image which is simply represented by brightness having a plurality of brightness values, the first gray-scale image being formed by first gray-scale pixels. The second processing unit determines the brightness value of each of the color pixels to produce a histogram showing a distribution of the color pixels with respect to the brightness.

Abstract: Provided is an apparatus and method for displaying a picture in a portable terminal. The method includes identifying a visibility color quality corresponding to the external brightness upon sensing of generation of a visibility control event, identifying external brightness, identifying a set color quality that is a color quality currently output to a display unit, comparing whether the visibility color quality is equal to the set color quality, and altering the set color quality into the visibility color quality when the comparison result is that the visibility color quality is not equal to the set color quality.

Abstract: An image forming apparatus which is capable of eliminating influence of in-plane variation contained in secondary-color patches, which is caused by devices, in performing gradation correction. A first toner pattern having a uniform density (of gray) and a second toner pattern having gradation (of gray and black) are formed in a direction orthogonal to a direction of driving an image bearing member. Gradation correction data for converting an input image signal associated with the toner of black is formed, based on density information on the second toner pattern formed by the two toners, and density information on the second toner pattern formed by the toner of gray.

Abstract: There is provided a color page printer including a print engine operable by a color mode for executing color printing and a monochrome mode for executing monochrome printing, and a control unit for controlling the print engine to generate a printed paper having a content corresponding to received print data.

Abstract: An image forming apparatus and an image forming method capable of executing process control at appropriate timing are provided. A control section of an image forming apparatus carries out control for determining execution time of process control and executing the process control. The control section includes a counting section, a determining section and a process control management section. The counting section counts a number of printed sheets. The determining section determines on what time process control is to be executed form the counted number of printed sheets for each time zone. The process control management section manages the process control executed at an image forming section with the whole of the image forming apparatus.

Abstract: A method for calibrating a printing system including a plurality of printers includes designating one of the plurality of printers as a reference printer and defining color values for a desired response for one or more printed test patches on a control page. Through a first process aimed toward achieving the desired response, a printed control page is generated with the reference printer, the control page including one or more of the test patches which, when measured, has a measured response which approaches the desired response. Through a second process aimed toward achieving a desired response, the desired response being the measured response of the reference printer, a printed control page is generated with a second of the printers, the control page including one or more of the test patches which, when measured, has a response which approaches the measured response of the reference printer.

Abstract: A digital camera (10) has nine imaging setting items. A plurality of operation modes are assigned to each imaging setting item. An imaging operation is performed according to valid operation modes selected for each imaging setting item one by one. When a mode key (50) is operated, three valid mode characters out of nine valid mode characters respectively corresponding to nine valid operation modes are displayed on a monitor (30). When a jog dial key (48) is operated, a display of the valid mode characters is renewed. As to the imaging setting item at the reference position, invalid operation modes are detected, and invalid mode characters indicative of the detected invalid operation modes are additionally displayed on the monitor (30). When a set key (44) is operated in a state that a cursor is pointed to an arbitrary invalid mode character, an operation mode corresponding to the invalid mode character is validated.

Abstract: A color processing method which sets viewing conditions easily and properly from shooting conditions added to an image. Shot image data and shooting conditions of the image data are obtained. Input side viewing conditions from the obtained shooting conditions are set. The image data with a color appearance model based on the set input side viewing conditions are converted.

Abstract: A test pattern printed by a printer is assessed—without colorimetric equipment—to provide data used in recalibrating the printer. The assessment may be made by an unskilled operator, and can include discerning whether a particular pattern is visible in the printed test pattern, or whether a feature in the test pattern is relatively wider or narrower. From such assessment, needed changes to the printer's calibration data are inferred and implemented. A variety of other printer calibration techniques are disclosed. The technology is illustrated in the context of dye sublimation printers, and is particularly useful in optimizing printing of digitally-watermarked graphics.

Abstract: An image forming device capable of controlling an auto color registration (ACR) and a method of controlling an ACR. In the image forming device, a sensor detects preliminary test patterns by colors on a conveying belt; a color registration correction unit determines a present alignment state of the respective colors using data detected using colors by the sensor, and judges whether to perform a correction work of relative registration positions of the respective colors on the basis of the result of the determination; and a control unit forms actual test patterns on the conveying belt if it is judged that the correction work should be performed, and controls the sensor and the color registration correction unit to re-detect the data using colors and to perform the correction work.

Abstract: An image forming apparatus has a scanning unit capable of forming a plurality of lines of an image simultaneously by scanning, in a main scanning direction, laser beam that has been emitted from a plurality of laser emitting devices. The apparatus has a memory for storing an error characteristic, in a sub-scanning direction with respect to an ideal scanning line in the main scanning direction, of a scanning line scanned by the scanning unit. A line on which image data is read out is changed over in accordance with a line changeover position in the main scanning direction based upon the error characteristic and a revised pixel position in the main scanning direction in the image data.

Abstract: A method of adjusting a printing system includes providing a printing system including a plurality of marking engines that include first, second and third actuators. The method includes setting each of the actuators of each marking engine to predetermined values, and generating a plurality of printed samples having a visually apparent background density using at least one of the marking engines. The method also includes evaluating the printed samples, and adjusting the first actuator of at least one marking engine based at least partially on the evaluation. A system is also disclosed.

Abstract: In order to obtain colorimetric data close to the color appearance under an actual viewing condition, a plurality of conversion data for converting colorimetric data measured under the first geometric condition of colorimetry into that measured under the second geometric condition of colorimetry are held, and the information of a viewing illuminant and colorimetric data measured under the first geometric condition of colorimetry are obtained. Conversion data which corresponds to the information of the viewing illuminant is interpolated from the plurality of conversion data which are held. The colorimetric data measured under the first geometric condition of colorimetry is converted into that measured under the second geometric condition of colorimetry using the interpolated conversion data.

Abstract: The present invention belongs to the field of printing control technology, and is especially one kind of printing control method with reducing printing memory requirement. The available printing technology always needs complicated segment forming gratings in advance and occupying great amount of memory. The printing control method of the present invention includes interpreting the page data as banded intermediate format data, calculating the time for forming grating of each band of the intermediate format data, pre-analyzing the bands with time for forming grating greater than the printing time, and arranging the job of forming grating of the complicated bands in the idle print time as far as possible. The said method can reduce the band number of forming gratings in advance and reduce the printing memory requirement.

Abstract: A method for attenuation of near-neutral image colors is described. The pixel chroma is determined. A chroma control point is determined. A pixel color is shifted toward neutral. An imaging device that is configured for attenuation of near-neutral image colors is described. The imaging device includes a processor. The imaging processing device includes memory in electronic communication with the processor. Instructions are stored in the memory. The instructions are executable to determine pixel chroma. The instructions are also executable to determine a chroma control point. The instructions are further executable to shift a pixel color toward neutral.

Abstract: An image reading apparatus that detects failure in the white LEDs constituting a white LED array. Failure in the white LEDs is detected by comparison between a prescribed current threshold and the current running in the LED array detected by an image reading apparatus controller when the white LED array composed of plural LED blocks connected in parallel, each LED block being composed of plural LEDs connected in series, is powered for failure detection. This failure check is conducted by checking LEDs for failure in each of the LED blocks constituting the LED array. Image reading is not permitted when faulty LEDs are detected in two neighboring LED blocks.

Abstract: Determination of a grid structure for a set of values in a device color space, in which heuristics are applied to a collection of color sample data in order to determine the structure of a look-up table that best fits the samples. Sampling data is sorted for each channel thereof, and the number of steps in each channel is counted. The data is checked for completeness. Steps are removed if they do not correspond to steps on the axes of a three-dimensional cube. If, as a result of step removal, a full LUT has been obtained, then the structure of the LUT has been determined and the process ends. On the other hand, if a full LUT has not been obtained, then steps are removed if they are under-correlated with other steps.

Abstract: A color image scanning system, method and medium that generates look-up tables for color data correction based on the type of printing paper and the kind of image on the printing papers, thereby improving color reproducibility upon scanning. A color image scanning system may include a storage unit to store look-up tables having correction values of first color data, obtained by scanning a first printing paper having a plurality of color patches, each of the look-up tables corresponding to a type of printing paper, and a final image generation unit to correct second color data, obtained by scanning a second printing paper, with reference to a look-up table of the look-up tables, the look-up table corresponding to the type of printing paper used by the second printing paper.

Abstract: A color processing apparatus includes a calculation unit configured to calculate a correction value from reference color information in an input color gamut and reference color information in a reference color gamut, a correction unit configured to correct reference target color information in the reference color gamut based on the correction value to calculate target color information, and a color conversion unit configured to convert an input color in the input color gamut into an output color within an output color gamut by using the target color information.

Abstract: A user connected to a remote printer can choose to activate a print-monitoring feature of the printer as part of the submitted print job. As the job begins to print, the output of the printer is monitored for print quality. If an event occurs during the print job that affects the print job, the user receives real-time notification of the status of the print job. The events can be printer related such as paper jam or print job related such as poor print quality. The user can have an option of reviewing various parts of the print job during the printing process. There can also be an automatic print job out evaluation. If the user accepts the print quality, the printer will continue printing the job. If the user is not satisfied with the print quality, the job is halted and sent to a temporary print buffer. While the job is halted, adjustments are made to either the printer to improve print quality or to the print parameters of the print job to improve print quality.

Abstract: A method and system are provided to correct differences among multiple spectrophotometers. In one form, one spectrophotometer of a plurality that may be present in an image rendering system is treated as “primary”. Additional spectrophotometers are treated as “secondary”. The spectrum of a color from a secondary spectrophotometer is transformed by a linear transformation to an adjusted spectrum, which then is converted to L*a*b* (if desired) using standard techniques. The L*a*b* thus produced is, on average, substantially closer to the L*a*b* that the primary spectrophotometer would have produced when measuring the same color than it is to the L*a*b* that the secondary spectrophotometer would have produced without any correction. The linear transformation is generated by linear regression to minimize the spectral error, followed by non-linear optimization to minimize the error relative to a color difference metric—such as DeltaE 2000.

Abstract: Systems and methods are provided for calibrating a sensory array to ensure a robust cross-process registration measurement. The calibration is implemented using a calibration step that determines the signature error amount of a given image reading sensor. The signature error amount for the sensor is stored in a signature error look-up table. When the sensors are used to sense print head alignment, the correction may be implemented by accessing the signature error look-up table for the given sensor when calibrating the print heads. The signature error look-up table provides an amount of offset for each sensor that is used in determining the appropriate head position of a given print head to calibrate the print heads for the signature error associated with the given sensor.

Abstract: An image processing device is provided which corrects error pixels without using a line buffer even in the case of using an image sensor with a structure having a plurality of sensors arranged in series. It has a detecting component for detecting the presence or absence of a factor of black line and Kth error pixel correcting processing components each for receiving the Kth pixel signal among the pixel signals output in N divisions, and for correcting error pixels. When the factor of black line is detected at a boundary between Kth and (K?1)th division outputs, the Kth error pixel correcting processing component notifies the (K?1)th error pixel correcting processing component of neighboring pixel information about the error pixels, and the (K?1)th error pixel correcting processing component corrects the error pixels at the boundary in response to the neighboring pixel information notified and the (K?1)th pixel signal.

Abstract: An automatic document feeder includes an input tray, a transfer path, a roller assembly, an ejecting tray, a light emitter, a light receiver, a comparator and a discriminating unit. The light emitter successively emits multiple light beams of different intensities to the document. When the multiple light beams penetrating through the document are received by the light receiver, the light receiver outputs corresponding voltage signals. The discriminating unit is electrically connected to the light receiver for discriminating document types according to the voltage levels of the voltage signals.

Abstract: A computer readable medium records a calibration program, which causes a control device to execute calibration processing of reading as image data a patch sheet output from an image formation device, having a plurality of patch patterns formed as images based on different density-gradation value data for each color, acquiring calorimetric values for each of the patch patterns from the read-out image data, and adjusting the density of the image formation device based on the density-gradation values and the acquired calorimetric values for each of the patch patterns. The program causes the control device to execute displaying the read-out image data of the patch sheet, detecting and displaying the position of each of the patch patterns in the image data of the patch sheet, and acquiring the calorimetric values for each the patch pattern based on the displayed patch pattern positions, in response to confirmation input by a user of the displayed patch pattern position.

Abstract: A method for compensating for color variations among multiple user printers by providing a target simulation process in each user printer that modifies its default color characteristics so that it has the same color characteristics as a designated target printer. In a WCS implementation, a target CDMP and a user CDMP representing color characteristics of the target printer and the user printer, respectively, are stored and used by the WCS workflow to perform color conversion when printing an image on the user printer. In an ICC implementation, a color simulation profile is generated that matches the color characteristics of the user printer to those of the target printer. The color simulation profile is combined with the default color profile of the printer to generate a combined color profile which is used to perform color conversion when printing an image on the user printer.

Abstract: A method for compensating an image produced by image means for implementing image information takes account of ambient illumination. Luminance of external background illumination around the image means is measured. The measured luminance of the background illumination is compared with preset tristimulus values and a reflectance factor of the image means, a comparison result is computed, and a control signal is generated to compensate luminance and chroma of an image. Luminance and chroma of the image means are compensated in response to the control signal.

Abstract: A method of compensating for a light amount drift of a photosensor used in an image control device, wherein the photosensor includes a light emitting portion and a light receiving portion which projects light onto an image control mark formed on an intermediate transfer medium of a printer and detects an optical signal reflected by the image control mark, thereby controlling the quality of an image. In the compensation method, the light amount drift is calculated by projecting light on the intermediate transfer medium, detecting an amount of light reflected by the intermediate transfer medium, and comparing the detected light amount with a pre-set reference light amount. The detected light amount is then corrected to be substantially equal to the reference light amount.

Abstract: An image copying apparatus includes a target data acquiring unit, a target data saving unit, an adding unit, a sampling data saving unit, a specifying unit, a sampling data saving unit, and a correcting unit. The target data acquiring unit acquires target data from a test chart document. The adding unit adds data displaying a specification image specifying the scanning unit having scanned a test chart recorded side to the recorded side image data. The sampling data acquiring unit acquires sampling data from a copy of the test chart document. The specifying unit specifies the scanning unit having scanned the test chart recorded side from the specification image. The sampling data saving unit saves the sampling data when the scanning unit having scanned the test chart copied side matches the specified scanning unit. The correcting unit corrects the image data based on a correcting feature generated from the saved data.

Abstract: A method includes receiving a first value in a first color space for conversion to a second value in a second color space. The first color space includes luminance, chroma, and hue components and the second includes black and multiple color components. The method includes identifying a color gamut limit of the second color space and determining multiple boundaries in the first color space corresponding to the limit. The method also includes identifying gray and saturation levels associated with first value based on a relationship of the luminance and chroma components and the boundaries. The method includes determining a black component value in the second color space using the identified gray level and the identified saturation level. The method also includes determining the second color value in the second color space using the black component value and the first value.

Abstract: A developer consumption determining method for determining a developer consumption of an image forming apparatus includes the steps of dividing one of writing pixels into a plurality of sub-pixels in a main scanning direction, determining a weighting coefficient for each of surrounding sub-pixels of one of the sub-pixels located within a predetermined distance from the one of the sub-pixels on the basis of positional relationships, determining respective emission coefficients for the surrounding sub-pixels on the basis of one of durations and exposures of the light beams applied to the surrounding sub-pixels, summing products of the weighting coefficients of the surrounding sub-pixels and the respective emission coefficients to obtain total exposure for the one of the sub-pixels, repeating for all of the sub-pixels the steps of determining the weighting coefficient, determining respective emission coefficients, and summing products, and summing the total exposures for all the sub-pixels to determine the devel

Abstract: The invention provides a printing apparatus that includes: a printing section; a display unit; a touch-sensitive panel that is overlaid on the display unit; a display controlling section; a three-primary-color correcting section that sets a corrected set of values that is recognized by the user as the apparent red, green, and blue base colors on the basis of a comparison made between the position of each of the red, green, and blue display cells that make up the red, green, and blue cell block and a touch position detected by the touch-sensitive panel, respectively; and a print controlling section that controls the printing section to print true red, green, and blue base colors as a color sample that is used when the three-primary-color correcting section performs correction.

Abstract: An image reader includes an image sensor including a plurality of light receiving elements. The plurality of light receiving elements receive a reflection light from a document and perform photoelectric conversion. The image reader further includes an MTF calculation portion which calculates an MTF of the image sensor based on image data which is obtained by reading a predetermined MTF detection pattern. Moreover, the image reader includes an image processing portion which divides the plurality of light receiving elements into a first MTF region and a second MTF region. The image processing portion performs a first image process on the plurality of image signals which are outputted from the light receiving elements in the first MTF region and a second image process on the plurality of image signals which are outputted from the light receiving elements in the second MTF region.

Abstract: Disclosed herein are optimal or near optimal algorithms implemented as software tools that will allow the user/machine to identify optimal media out of the job set automatically. There are at least two main process steps to the exemplary embodiment. The first step involves the off-line characterization of the printing/image rendering system that will be used to extract the principal basis vectors from the experimental data. The second step involves the run-time mode, in which the pre-characterized basis vectors are used in conjunction with an optimal algorithm that will identify the media for re-calibration/re-characterization from the group of media set that the customer is interested to print. The optimal algorithm performs the combinatorial search every time the customer wishes to select the media. Once the optimal media is selected, the customer or the machine can print color patches (which are also optimal set) and execute the rest of the processing to reconstruct the best color management LUTs.

Abstract: Various techniques for implementing aspects of color control in display devices are disclosed. One exemplary technique includes measuring an input/output profile of a display, then applying a mathematical model to the display's measured profile to generate color control tables. One exemplary technique may include tracking a first color temperature below a high-luminosity transition point and gradually transitioning to tracking a second color temperature above the high-luminosity transition point. One exemplary technique may also include gradually transitioning from tracking a darklight color temperature below a low-luminosity transition point to tracking the first color temperature above the low-luminosity transition point. Another exemplary technique may include tracking a response curve for a specified chromaticity above a low-luminosity transition point.

Abstract: An image processing system and method include allowing an output device to output patch-data items of plural multi-order colors represented by a first color space, measuring the color values, in an absolute color space, of the output patch-data items, calculating reference values by converting the plural multi-order colors represented by the first color space based on a first color conversion table containing correspondence between the first color space and the absolute color space, calculating distances between the color values measured by the color measuring means and the reference values, which correspond thereto, and correcting, based on the calculated distances, a second color conversion table containing correspondence between the absolute color space and an output color space.

Abstract: A method of producing a printed output on a substrate is provided using a drop emitting device which is adapted to emit a plurality of ink quantities in response to a control signal.

Abstract: An automatic gray balance control system to produce TRCs for all primary colors in a reproduction device and for each pitch of a photoreceptor system by printing target patches for each pitch, measuring the output colors, and automatically readjusting the tone reproduction curves until a satisfactory level of accuracy is obtained as compared to the theoretical desired output. The system produces pitch-based gray balanced TRCs that are updated frequently for each pitch, with different TRCs for different pitches, to ensure consistency in output from pitch to pitch as well as from page to page on a given pitch.

Abstract: A method and apparatus that evaluates an image registration for image processing is disclosed. The method may include outputting one or more test patterns to a user, receiving misregistration level input parameters from the user, calculating misregistration using the misregistration level input parameters from the user by adding a first edge of a page perceptibility threshold and a second edge of the page perceptibility threshold and dividing the result of the addition by two, determining if the calculated misregistration is acceptable, wherein if the calculated misregistration is not acceptable, making corrections to the image registration, otherwise using the image registration for image processing based on the calculated misregistration.

Abstract: There is provided a method of generating a tone correction table used to correct tone characteristics of image data of each component color in a color image forming apparatus, comprising the steps of outputting color patch images of each component color for respective tone levels corresponding to a plurality of different image data values, acquiring colorimetric values including brightness values, chromatic values, and reflection spectra of respective patches by measuring colors of the output color patch images, analyzing characteristics of the calorimetric values for respective tone levels based on the calorimetric values of the color patch images, selecting a tone correction table generation method according to the characteristics obtained in the analysis step, and generating a tone correction table to have tone characteristics as target characteristics according to the selected tone correction table generation method.

Abstract: Elements of the present invention relate to systems and methods for determining device white point and gamma correction curve characteristics.

Abstract: System and apparatus for automatically correcting alignment of printer writers using a scanner for calculating a calibration parameter. The calibration parameter is used to adjust or maintain the alignment of the printer writers.

Abstract: An apparatus and method for acquiring an image of a predetermined extract of a moving printed product employs at least one black-and-white camera with a two-dimensional electronic image sensor and one or more illumination devices suitable for pulse-like illumination. The illumination device has multiple light sources forming spectral groups that have different spectral compositions. The light sources are arranged in a pattern such that the light sources of each spectral group completely illuminate the area of observation of the camera. A control device switches the individual spectral groups of light sources on and off sequentially such that the area of observation of the camera is illuminated with a sequence of light pulses of different spectral compositions. During each light pulse, the predetermined extract on a printed product moves into the area of observation of the camera, and an image of extract is captured.

Abstract: In an image recording apparatus, shift times for shifting switching timings of light modulator elements are obtained so that rise times (U1) after input of output start signals to driving elements connected to respective light modulator elements of a spatial light modulator and fall times (D1) after input of output stop signals become a constant target rise time (U2) and a constant target fall time (D2). This makes it possible to suppress unevenness of the rise times and the fall times after correction of light amounts even if light modulator elements where the rise times and the fall times change by correction of light amounts are used and consequently, an image can be appropriately recorded without a complicate apparatus.

Abstract: A method of printing an interface onto a surface is disclosed. The method starts by providing a printer comprising a data input module for receiving document data from a computer system, a coded data generator for generating coded data using at least some of the document data, the coded data being indicative of an identity of a region of a surface to be printed on and of a plurality of locations on the surface to be printed on, a printhead for printing the interface onto the surface, and an ink supply for supplying ink to the printhead, the ink supply comprising an ink set including at least one visible text/graphics ink and a coded data ink, the coded data ink being absorptive of wavelengths in the near-infrared range. Visible text/graphics and the coded data is then printed onto the surface using the printer.

Abstract: A marking device is controlled to mark a media sheet with halftone dots selected from a set of image halftone dot representations. The marking device is controlled to mark a monitored surface with halftone dots selected from a set of control halftone dot representations to form test patches of different nominal marking densities. Measured marking densities are acquired using a density sensor for the test patches marked on the monitored surface. The set of control halftone dot representations is updated based on the measured marking densities and the nominal marking densities.

Abstract: A method of controlling an image processing apparatus comprising the steps of: generating color reduced image data from the color image data; generating monochrome reduced image data from the monochrome image data; and determining the order of generation of the color or monochrome reduced image data when generating both the color reduced image data and the monochrome reduced image data for display.

Abstract: At the time of setting a correction value for a certain density (subject density), a higher side density that is higher than the certain density and a lower side density that is lower than the certain density to be referenced according to the measured value of a region printed at the certain density are arbitrarily specified, and a correction value for the certain density is set by using at least one of a measured value of the density of a region printed at the arbitrarily specified higher side density and a measured value of the density of a region printed at the arbitrarily specified lower side density.

Abstract: A color control algorithm compensates variations in the display system so as to maintain color consistency in the projected images on the screen by constructing a color mapping table of the display system to include effects due to the variations and during image display applications, generating inputs of the color mapping table to include the effects due to the variations in the display system.

Abstract: The color management system comprises a state-space based model for a pixel element in a dynamically varying color marking device. A sensor measures the color of the printed output for construction of a selected set of sensitivity functions representative of color output relating to inputs. The gradients of the sensitivity functions are extracted and used to develop the corresponding discrete multivariable state-space model of the pixel element. More particularly, the model is constructed from the Jacobian matrix characterizing a change in measured color output for a change in input color values of the pixel. Extension of modeling methodology for a single pixel is applied to multiple pixel elements.