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| Number | Title | Issue Date |
| 8441699 | Image forming device having color density correction An image forming device includes an image forming unit forms an image based on image data by using at least one of a plurality of colors of developer. A test image forming unit controls the image forming unit to form a test image based on test image data. A measurin... | 05/14/2013 |
| 8400693 | Image defect diagnostic system, image forming apparatus, image defect diagnostic method and computer readable medium An image defect diagnostic system includes: an acquiring unit acquiring image data for a test target image; an image defect detecting unit detecting image defects in the test target image; a coordinate conversion processor performing coordinate conversion processing... | 03/19/2013 |
| 8400692 | Systems and methods for embedding metadata in a color measurement target Systems and methods for utilizing metadata embedded in a color measurement target to uniquely identify the target through color measurement. A color measurement target is used for color calibration, color characterization, color adjustment and/or color correction of... | 03/19/2013 |
| 8368977 | Method of creating 4x4 LUTs using a source and destination ICC profile A 4×4 LUT comprises a K to K LUT merged with a CMYK to CMYK LUT with values ranging from [0, 0, 0, 0] to [0, 0, 0, 255], said 4×4 LUT written to a known file format. A method for creating 4×4 look up tables (LUTs) uses the source and destination ICC profiles. A K... | 02/05/2013 |
| 8358452 | Imaging system and method An imaging system comprises a calibration system adapted to perform a calibration scan of a charged luminescent calibration strip disposed in a scan window of an automatic document feeder. The calibration system is adapted to determine whether an opaque object is di... | 01/22/2013 |
| 8345329 | Systems and methods for improving image quality in image forming devices An image forming device may select from among a plurality of rendering parameters to include selectable halftone frequency candidates automatically based on an internal determination regarding an operating condition of the device to improve image quality for formed ... | 01/01/2013 |
| 8339689 | Exposure correction for scanners A method and apparatus for exposure correction in scanners are disclosed. In the method, exposure is corrected for pixels received in an image sensor array. Exposure time is tracked for the incoming pixel data and a calibration factor is determined for correcting th... | 12/25/2012 |
| 8339690 | Halftone printing with different screens A method of enabling preparing a printing system calibrated with a first halftone screen for printing with a second halftone screen. The calibration is represented by calibration data. Calibration data for the second halftone screen is produced from the existing cal... | 12/25/2012 |
| 8314978 | Halftone independent device characterization accounting for colorant interactions A model-based halftone independent method for characterizing a printer equipped with a plural of halftone screens comprises: printing a target set of basic patches comprised of a fundamental binary pattern independent of a halftone screen; measuring true color print... | 11/20/2012 |
| 8305660 | Methods and systems achieving print uniformity using reduced memory or computational requirements Engine response curves (RCs) can be used for streak compensation for printed documents. A feedback control paradigm can be included to effect RC compensation. Singular Value Decomposition (SVD) can be used to represent each RC in the collection of spatial RC data as... | 11/06/2012 |
| 8274714 | Quantifiable color calibration Techniques relating to quantifiable color calibration are described. In one instance, a process quantifiably calibrates a first color peripheral device of a system to a known color standard. The process then leverages the first color peripheral device to calibrate o... | 09/25/2012 |
| 8259369 | Color characterization or calibration targets with noise-dependent patch size or number A calibration or characterization system is provided wherein the number of repeated patches or the size of a patch of a given color is printed to be approximately proportional to the square of the expected noise level. In that way, when multiple measurements for a g... | 09/04/2012 |
| 8253997 | Correction information creation device, image formation device, correction information creation program storage medium and correction information creation method A correction information creation device including: a recording head; a rotating body; a first detector that detects a period of a pulse signal generated in accordance with rotation of the rotating body; a first calculation section that calculates a period of a cloc... | 08/28/2012 |
| 8253996 | System, color image producing device, color measurement device and color measurement method A system is disclosed comprising a color image producing device for providing a test pattern on a medium, said test pattern comprising a plurality of color patches, said test pattern having a principal orientation axis under a non-perpendicular angle α with the pro... | 08/28/2012 |
| 8238000 | Method and apparatus for calibrating a transport scanner and a test original for use with such method A method for geometrically calibrating a transport or feed through a scanner apparatus, arranged for scanning a two-dimensional original for subsequent usage in an appropriate information handling system, wherein a test original is presented which has been provided ... | 08/07/2012 |
| 8208183 | Detecting image quality defects by measuring images printed on image bearing surfaces of printing devices Systems and methods for implementing use of customer documents in maintaining image quality or image quality consistency of printing devices are provided. The system may include a marking engine constructed to print images on an image bearing surface of the print de... | 06/26/2012 |
| 8203768 | Method and system for processing scanned patches for use in imaging device calibration The presently described embodiments provide for halftone-aligned averaging and noise reduction in a calibration method and associated system. Halftone-aligned averaging is implemented, in one form, as a method of averaging in which the window over which an average i... | 06/19/2012 |
| 8184347 | Opportunistic process control for printers A method is disclosed. The method includes receiving print data at an electrophotographic printer; examining the print data to determine if an image within the print data may be used to perform one or more process control measurements and performing the process cont... | 05/22/2012 |
| 8169674 | Image reading apparatus and method of controlling the same An image reading apparatus capable of changing a main reading unit at an appropriate time point such that a plurality of reading units can be equally used, and a method of controlling the same. The image reading apparatus includes an automatic document feeder, a fir... | 05/01/2012 |
| 8149480 | Image forming apparatus and method for calibration scheduling based on hour-by-hour and day-of-week use frequency An image forming apparatus which is capable of increasing printing efficiency by simplifying the calibration operation in time zones during which the frequency of use of the apparatus is high. An image forming apparatus has a plurality of calibration modes set in ad... | 04/03/2012 |
| 8130427 | Method and apparatus for generating origin signal of encoder When generating an origin signal of an encoder having a scale on which an incremental pattern and the origin pattern are formed, an origin signal having a necessary position and width is generated by software based on an origin waveform obtained from the origin patt... | 03/06/2012 |
| 8125694 | Method of determining number of patches A test chart used for color calibration includes: the number of patches of a first color; and the number of patches of a second color. The number of patches of the first color is determined on the basis of the degree of variation in the colorimetric value of the fir... | 02/28/2012 |
| 8120824 | Image forming apparatus and image forming method An image forming apparatus including: an image forming section which forms an image on a photosensitive drum based on a reference signal which being an image write control signal of a predetermined cycle; a measuring section which detects a rotational velocity of th... | 02/21/2012 |
| 8089668 | Method of compensating for clipping in input scanners Systems and methods are described that facilitate improving error estimation for calibration error due to clipping of pixels, and compensation therefor, during calibration of a scanner or printer. Calibration patches are measured at a first maximum pixel value thres... | 01/03/2012 |
| 8089667 | Method for determining parameters relevant to the print quality of a printed product The invention provides a method for determining parameters relevant to the print quality of a printed product. A macroscopic photogram of a measuring field of the printed product is recorded using a camera having a macro lens. An actual value of a parameter relevant... | 01/03/2012 |
| 8064110 | Adaptive auto white balance An imaging system generates a gain for a component of an image format. The gain is at least partially dependent on the brightness of the light source illuminating a scene when an image of the scene was generated. The gain can be used to correct the component of the ... | 11/22/2011 |
| 8059318 | Color image forming apparatus and control method therefor A color image forming apparatus includes a density sensor which detects the light reflecting characteristics of an unfixed toner image formed on an image carrier or a transfer material carrier, and a color sensor which detects the light reflecting characteristics of... | 11/15/2011 |
| 8049939 | Method, apparatus and computer program for generating transfer functions to be used in a printiing system A method of generating transfer functions to be applied to the input data of an image to be printed by a printing apparatus using a group of colorants, each colorant being assigned to the rendering of a distinct color channel, includes determining a maximum total ar... | 11/01/2011 |
| 8004729 | Low cost adjustment method for printing systems 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, an... | 08/23/2011 |
| 7978382 | Computer readable medium recording a calibration program, calibration method, and calibration system for detecting patch positions during acquisition of calorimetric values from a patch sheet 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 dif... | 07/12/2011 |
| 7969625 | Pitch to pitch online gray balance calibration with dynamic highlight and shadow controls 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 repro... | 06/28/2011 |
| 7969624 | Method and system for identifying optimal media for calibration and control 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 i... | 06/28/2011 |
| 7957043 | Image recording apparatus and image recording method 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 ... | 06/07/2011 |
| 7944592 | Image capture device Embodiments of a method performed by an image capture device are provided. The method includes performing a calibration operation on a photosensor array of the image capture device using a background surface with a substantially uniform grey color and performing a s... | 05/17/2011 |
| 7907314 | Image forming apparatus An image forming apparatus has a mode selector that can select a mode of operation in which the image forming apparatus remains online despite an empty printing media container or another error condition. This mode enables a host device to switch from an empty print... | 03/15/2011 |
| 7898704 | Image output controller An image output controller is capable of directly or indirectly controlling a printer printing a color chart and a color measuring apparatus carrying out color measurement for the color chart. When color authentication is executed for an optionally set image, a proc... | 03/01/2011 |
| 7894108 | System for matching outputs of multiple digital printers A system controls multiple digital printers, each printer including a processor, which processes incoming image data to be printed, and an engine, which places marks on a print sheet. A system-wide database includes a software portion, which contains data relating t... | 02/22/2011 |
| 7889402 | Method for limiting total colorant coverage using multidimensional simplicial subdivision and barycentric interpolation Systems and methods for limiting total colorant in a color rendering system are disclosed. Implementation of the present invention provides for transformation of a specified colorant in which the sum of the colorant components exceeds a total area coverage (TAC) lim... | 02/15/2011 |
| 7889403 | Methods and apparatus for calibrating a digital color imaging device that uses multi-hue colorants Methods and apparatus are provided for calibrating a digital color imaging device to a printing press by determining a total colorant limit, per-channel colorant limits, and channel linearization tables using colorimetric and/or spectrophotometric techniques. In add... | 02/15/2011 |
| 7880941 | Image forming device, and calibration method and computer readable medium therefor An image forming device, which is capable of double-side printing to form an image on each of first and second sides of a recording medium, includes a calibration unit configured to perform calibration for modifying quality of the image to be formed, a first judging... | 02/01/2011 |
