US20080136836A1 - Method for mapping colors between imaging systems and method therefor - Google Patents

Method for mapping colors between imaging systems and method therefor Download PDF

Info

Publication number
US20080136836A1
US20080136836A1 US12/020,181 US2018108A US2008136836A1 US 20080136836 A1 US20080136836 A1 US 20080136836A1 US 2018108 A US2018108 A US 2018108A US 2008136836 A1 US2008136836 A1 US 2008136836A1
Authority
US
United States
Prior art keywords
device
color
performing
device profile
defined
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/020,181
Inventor
Christopher J. Edge
Timothy A. Fischer
William A. Rozzi
Original Assignee
Edge Christopher J
Fischer Timothy A
Rozzi William A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US08/884,411 priority Critical patent/US6108442A/en
Priority to US08/882,561 priority patent/US6088038A/en
Priority to US09/536,366 priority patent/US7382379B1/en
Priority to US12/020,181 priority patent/US20080136836A1/en
Application filed by Edge Christopher J, Fischer Timothy A, Rozzi William A filed Critical Edge Christopher J
Publication of US20080136836A1 publication Critical patent/US20080136836A1/en
Assigned to CITICORP NORTH AMERICA, INC., AS AGENT reassignment CITICORP NORTH AMERICA, INC., AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EASTMAN KODAK COMPANY, PAKON, INC.
Assigned to WILMINGTON TRUST, NATIONAL ASSOCIATION, AS AGENT reassignment WILMINGTON TRUST, NATIONAL ASSOCIATION, AS AGENT PATENT SECURITY AGREEMENT Assignors: EASTMAN KODAK COMPANY, PAKON, INC.
Assigned to PAKON, INC., EASTMAN KODAK COMPANY reassignment PAKON, INC. RELEASE OF SECURITY INTEREST IN PATENTS Assignors: CITICORP NORTH AMERICA, INC., AS SENIOR DIP AGENT, WILMINGTON TRUST, NATIONAL ASSOCIATION, AS JUNIOR DIP AGENT
Assigned to JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE reassignment JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE INTELLECTUAL PROPERTY SECURITY AGREEMENT (FIRST LIEN) Assignors: CREO MANUFACTURING AMERICA LLC, EASTMAN KODAK COMPANY, FAR EAST DEVELOPMENT LTD., FPC INC., KODAK (NEAR EAST), INC., KODAK AMERICAS, LTD., KODAK AVIATION LEASING LLC, KODAK IMAGING NETWORK, INC., KODAK PHILIPPINES, LTD., KODAK PORTUGUESA LIMITED, KODAK REALTY, INC., LASER-PACIFIC MEDIA CORPORATION, NPEC INC., PAKON, INC., QUALEX INC.
Assigned to BARCLAYS BANK PLC, AS ADMINISTRATIVE AGENT reassignment BARCLAYS BANK PLC, AS ADMINISTRATIVE AGENT INTELLECTUAL PROPERTY SECURITY AGREEMENT (SECOND LIEN) Assignors: CREO MANUFACTURING AMERICA LLC, EASTMAN KODAK COMPANY, FAR EAST DEVELOPMENT LTD., FPC INC., KODAK (NEAR EAST), INC., KODAK AMERICAS, LTD., KODAK AVIATION LEASING LLC, KODAK IMAGING NETWORK, INC., KODAK PHILIPPINES, LTD., KODAK PORTUGUESA LIMITED, KODAK REALTY, INC., LASER-PACIFIC MEDIA CORPORATION, NPEC INC., PAKON, INC., QUALEX INC.
Assigned to BANK OF AMERICA N.A., AS AGENT reassignment BANK OF AMERICA N.A., AS AGENT INTELLECTUAL PROPERTY SECURITY AGREEMENT (ABL) Assignors: CREO MANUFACTURING AMERICA LLC, EASTMAN KODAK COMPANY, FAR EAST DEVELOPMENT LTD., FPC INC., KODAK (NEAR EAST), INC., KODAK AMERICAS, LTD., KODAK AVIATION LEASING LLC, KODAK IMAGING NETWORK, INC., KODAK PHILIPPINES, LTD., KODAK PORTUGUESA LIMITED, KODAK REALTY, INC., LASER-PACIFIC MEDIA CORPORATION, NPEC INC., PAKON, INC., QUALEX INC.
Assigned to KODAK (NEAR EAST), INC., KODAK REALTY, INC., FAR EAST DEVELOPMENT LTD., KODAK PORTUGUESA LIMITED, KODAK PHILIPPINES, LTD., PAKON, INC., QUALEX, INC., KODAK AVIATION LEASING LLC, NPEC, INC., CREO MANUFACTURING AMERICA LLC, FPC, INC., LASER PACIFIC MEDIA CORPORATION, EASTMAN KODAK COMPANY, KODAK IMAGING NETWORK, INC., KODAK AMERICAS, LTD. reassignment KODAK (NEAR EAST), INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Assigned to QUALEX INC., KODAK (NEAR EAST) INC., KODAK AMERICAS LTD., EASTMAN KODAK COMPANY, KODAK REALTY INC., KODAK PHILIPPINES LTD., FAR EAST DEVELOPMENT LTD., FPC INC., NPEC INC., LASER PACIFIC MEDIA CORPORATION reassignment QUALEX INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BARCLAYS BANK PLC
Abandoned legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40Picture signal circuits
    • H04N1/407Control or modification of tonal gradation or of extreme levels, e.g. background level
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46Colour picture communication systems
    • H04N1/56Processing of colour picture signals
    • H04N1/60Colour correction or control
    • H04N1/603Colour correction or control controlled by characteristics of the picture signal generator or the picture reproducer
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46Colour picture communication systems
    • H04N1/56Processing of colour picture signals
    • H04N1/60Colour correction or control
    • H04N1/603Colour correction or control controlled by characteristics of the picture signal generator or the picture reproducer
    • H04N1/6052Matching two or more picture signal generators or two or more picture reproducers
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed

Abstract

A method of performing color conversion between profiles includes comparing two sets of measured and reference data for at least one device corresponding to one of the profiles used in the color conversion, the data from the two sets of measured and reference data correspond to the same device values and are indicative of differences in behavior between a current state of the device and a reference state of the device in which at least one member of the set includes more than one non-zero value of colorants. And performing one-dimensional corrections to one of the profiles in order to account for the differences between the measured and reference data sets prior to performing color conversion.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • This Application is a Divisional of U.S. application Ser. No. 09/536,366 filed Mar. 27, 2000, which is a Continuation of U.S. application Ser. No. 08/882,561 filed Jul. 3, 1997, now U.S. Pat. No. 6,088,038, and is a Continuation-In-Part of U.S. application Ser. No. 08/884,411 filed Jun. 27, 1997, now U.S. Pat. No. 6,108,442.
  • FIELD OF THE INVENTION
  • The present invention relates to color imaging. More particularly, the present invention relates to mapping colors between color imaging systems.
  • BACKGROUND OF THE INVENTION
  • Color reproduction processes typically involve using color imaging systems to produce colors on various media. These color imaging systems may be used to duplicate a color image from one medium to another medium, e.g., from one printed copy to another or from a display screen to a printed copy. Color reproduction processes are used in various application environments, for example, color proofing applications.
  • Some color reproduction processes use approaches known as color management systems (CMSs) to characterize various color imaging systems and to transform color data between the color imaging systems. Characterizing color imaging systems typically involves calculating color response functions using color coordinate systems known as color spaces. One commonly-used color space is Commission Internationale de l' Éclairage L*a*b; (CIELAB) space. CMSs attempt to reproduce an original color image on a color imaging system so as to preserve the appearance of colors between the original and the reproduction within the limitations of the color imaging system of the reproduction process.
  • Various CMS approaches have been proposed to achieve accurate color reproduction. Many of these approaches involve producing color samples using an output or display device and measuring the color values of the samples using an input device. Such approaches correlate the output colors with the measured color values. This correlation is performed using, for example, forward and reverse transforms between device-specific color spaces and a device-independent color space. These transformation techniques are often supplemented by interpolation between entries in a multidimensional lookup table. These techniques exhibit inaccurate color conversion between similar devices, potentially resulting in undesirable contamination of colors. Furthermore, accurate color conversion of dark colors has often been particularly difficult because of inadequate processing of black channel data in many applications.
  • CMSs often perform gamut mapping to correlate the range or gamut of colors that can be realized by a device with regions of a color space. Because many devices are incapable of realizing the complete range of colors in a color space, gamut mapping typically involves compressing or scaling regions of the color space. The device can then approximate colors outside its gamut using the compressed regions of the color space. For many CMSs, gamut mapping is potentially inconsistent under certain circumstances, such as when using profiles generated by software from different vendors. In addition, many CMSs exhibit inconsistencies when performing forward and reverse transformations between imaging systems. For example, color shifting often occurs with repeated forward and reverse transformations.
  • Many CMS techniques exhibit other limitations in addition to the lack of accuracy in converting colors. For example, many CMS techniques are relatively inflexible with respect to changes in illumination and observer conditions, gamut mapping, and choice of color space. Certain techniques lack forward compatibility with future color standards.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • Other aspects and advantages of the present invention will become apparent upon reading the following detailed description and upon reference to the drawings in which:
  • FIG. 1 is a block diagram illustrating an example color mapping system, according to an embodiment of the present invention;
  • FIG. 2 is a block diagram illustrating an example arrangement implementing part of the color mapping system of FIG. 1, according to an embodiment of the present invention;
  • FIG. 3 is a block diagram illustrating another example arrangement implementing part of the color mapping system of FIG. 1, according to an embodiment of the present invention;
  • FIG. 4 is a block diagram illustrating yet another example arrangement implementing part of the color mapping system of FIG. 1, according to an embodiment of the present invention;
  • FIG. 5 is a block diagram illustrating still another example arrangement implementing part of the color mapping system of FIG. 1, according to an embodiment of the present invention; and
  • FIG. 6 is a flow chart illustrating an example color mapping method, according to another embodiment of the present invention.
  • While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
  • DETAILED DESCRIPTION OF THE VARIOUS EMBODIMENTS
  • The present invention is believed to be applicable to a variety of systems and arrangements that characterize color imaging systems. The invention has been found to be particularly advantageous for transforming colors between different color imaging systems. An appreciation of various aspects of the invention is best gained through a discussion of these particular application examples.
  • According to one aspect of the present invention, a color mapping technique may be applied to a variety of color imaging systems to generate a color map that can be used to transform the color response of one color imaging system, referred to as a source color imaging system, to match the color response of another color imaging system, referred to as a destination color imaging system. The color mapping technique projects color coordinates in the color space used by the source color imaging system into, for example, a device-independent color space. optimal color coordinates in the color space used by the destination color imaging system are determined that realize a relatively close match between the projections into the device-independent color space of the color coordinates in the color space used by the source color imaging system and the optimal color coordinates. The color mapping technique then generates a color map based on the optimal color coordinates for a number of color coordinates in the color space used by the source color imaging system.
  • FIG. 1 illustrates an example system 100 according to the present invention configured to transform colors between imaging systems. The system 100 includes an appropriately-programmed computer arrangement 102. The computer arrangement 102 may be implemented using any of a variety of conventional resources, for example, a personal computer and CD-ROM based software. Other computer-based designs may be used as well. For example, the computer arrangement 102 may be implemented using a microprocessor that acts as a read-only memory (ROM) into which a software application program is loaded. The software application program may be incorporated, for example, in a color management software package.
  • A color mapping system 104 includes a color management system 106. The color management system 106 receives a source device profile 108 and a destination device profile 110. These device profiles describe mappings from device-dependent color coordinate systems used by respective color imaging systems to device-independent color coordinate systems.
  • The color management system 106 processes the source device profile 108 and the destination device profile 110 to generate a color map 114. The color map 114 describes a relationship between the color imaging systems used by the source and destination devices. A memory 116 stores the color map 114. Subsequently, the color management system 106 uses the color map 114 to transform a set of source coordinates 118 in a device-dependent source device color space into a set of destination coordinates 120 in a device-dependent destination device color space.
  • FIG. 2 illustrates an example color management system 200 for transforming colors between imaging systems according to the present invention. A source device profile interpreter 202 receives a source device profile 206. The source device profile 206 is used to map coordinates in the source device color space to some form of color data, such as spectral or XYZ tristimulus values. For example, if the source device is a halftone color printer, the source device profile 206 may map CMYK color values to a XYZ color space. The source device profile interpreter 202 interprets the source device profile 206 and converts coordinates in the source device color space to a device-independent color space known as a profile connecting space (PCS). The PCS is used for converting the coordinates in the source device color space to the destination device color space. The PCS may be, for example, the CIELAB color space. Another example PCS is described in co-pending U.S. patent application Ser. No. 08/884,411, now U.S. Pat. No. 6,108,442, entitled “Characterization of Color Inaging System” (Christopher Edge et al.), filed on Jun. 27, 1997, and incorporated herein by reference.
  • A destination device profile interpreter 208 receives a destination device profile 210. The destination device profile 210 is used to map color coordinates in a destination device color space used by a destination device 212 to some form of color data, such as spectral or XYZ tristimulus values. For example, if the destination device 212 is a cathode ray tube (CRT) monitor, the destination device profile 210 may map color coordinates in a red-green-blue (RGB) color space to XYZ tristimulus values. The destination device profile interpreter 208 interprets the destination device profile 210 and converts color coordinates in the destination device color space to the PCs.
  • The source and destination device profile interpreters 202 and 208 may be implemented using any of a variety of hardware and software arrangements and are configurable for a variety of application environments. For example, if the source and destination device profiles 206 and 210 are International Color Consortium (ICC) device profiles, the source and destination device profile interpreters 202 and 208 are optionally configured to include white- and black-point parameters to account for color variations between media and colorants used by different color display devices. The source and destination device profile interpreters 202 and 208 can also be configured to include pleasing color corrections, such as L′ rescaling and a′b′ hue adjustments. Alternatively, the pleasing color corrections can be incorporated into the color transformer 214. In certain other application environments, the source and destination device profile interpreters 202 and 208 are further configurable to include, for example, illuminant and observer functions.
  • The device profile interpreters 202 and 208 can be configured using any of a variety of approaches. For example, plug-in software modules can be used to configure the device profile interpreters 202 and 208. Using plug-in software modules obviates the need to use new versions of the color management system 200 or of the device profiles 206 and 210 when adding, for example, a newly defined color space, a custom illuminant, such as fluorescent light, or a new gamut mapping technique. These options can be selected, e.g., using a setup window at the operating system level. For example, if the operating system is Apple OS version 7.5, these options can be selected using a control panel interface.
  • If the device characterization is non-spectral, the color management system 200 can use the original spectral data that is saved with the profile to reconstruct the device profiles according to various conditions, such as illuminant functions and color space choices. For example, if one uses an RGB regression to convert scanner RGB values into color space values for a particular combination of color space and illuminant and observer conditions based on a set of spectral data, the regression for a new set of conditions can be generated based on the same spectral data. Accordingly, the device profiles 206 and 210 can be used to calculate color values for a variety of conditions and color appearance models
  • A color transformer 214 obtains PCS color coordinates from the source and destination device profile interpreters 202 and 208. The color transformer 214 uses these color coordinates to develop a color map 216 that expresses a relationship between the color spaces used by the source and destination devices 204 and 212. To generate the color map 216, the color transformer 214 may use any of a variety of gamut mapping techniques. One such technique that has been found to yield particularly accurate results involves reducing the color error between the source and destination devices. The color error is defined, for example, by Euclidean distances in the PCS or by weighted sum square errors in a color space that is polar in the chromatic dimensions of the PCS. Defining the color error using weighted sum square errors results in a mapping between color imaging systems that accurately maintains colors in reproduced images. By using error reduction techniques, the color transformer 214 avoids generating significant cumulative error in performing multiple forward and reverse transformations between color spaces.
  • The color transformer 214 is implemented using, for example, a software program, and can be configured for a variety of applications. For example, the color transformer 214 can be configured to perform a 100% black point scaling for mapping a printed color image to a monitor display of the image. On the other hand, because newsprint has a relatively weak black point attributable to its ink density and light-transmitting properties, the color transformer 214 can be configured to perform, for example, a 50% black point scaling when mapping a color image printed on newsprint to the Matchprint™ color imaging system. The color transformer 214 is also configurable to use, for example, illuminant and observer functions, which the color transformer 214 provides to the source and destination device profile interpreters 202 and 208. The color management system 200 receives user preferences from an input 218 to determine how to configure the color transformer 214.
  • After developing the color map 216, the color transformer 214 can be used to transform colors between the source and destination devices 204 and 212. The color transformer 214 receives color coordinates from the source device 204 and transforms them using the color map 216. This transformation produces a set of color coordinates in the destination device color space. The destination color imaging system then reproduces the color on the destination device 212 using these color coordinates.
  • FIG. 3 illustrates an example device profile interpreter 300 implementing part of the color management system 200 of FIG. 2. The device profile interpreter 300 uses a device profile 302 to convert device coordinates received at an input 304 to PCS color coordinates, which the device profile interpreter 300 provides at an output 306. The device profile 302 describes the relationship between the device coordinates and some form of color data. Additionally, the device profile 302 optionally stores the raw spectral data used to construct the device profile 302. The raw spectral data allows subsequent construction of more accurate device profiles 302, e.g., if ICC specifications change. This updating can be performed automatically, for example, upon detecting that some component of the device profile 302 is out of date. Updates can also be performed periodically based on a schedule. To update the device profile 302, a new profile can be generated using the spectral data. Alternatively, error reduction, such as a one-dimensional correction, can be performed on each channel in the original look-up table for constructing the new profile. This correction can be applied as a separate set of one-dimensional tables or applied directly to the analytical model or multidimensional look-up table. For additional information concerning an example error reduction procedure that can be used in constructing a new profile, reference can be made to U.S. patent application Ser. No. 08/431,614, entitled “Apparatus and Method for Recalibrating a Multi-Color Imaging System,” assigned to the instant assignee and incorporated herein by reference.
  • A device profile processor 308 receives the device coordinates from the input 304 and the device profile 302. The device profile 302 may be, for example, an ICC profile. If the device profile 302 exists in this format, the device profile processor receives the forward portion of the profile, i.e., the portion used for converting device coordinates to PCS color coordinates. Alternatively, the device profile 302 can be stored in another format. The device profile processor 308 processes the device coordinates using the device profile 302 and outputs certain data based on the device profile 302. For example, if the device profile 302 is an ICC profile, the device profile processor 308 outputs XYZ tristimulus values for a particular set of observer conditions (e.g., illuminant and observer functions). if the device profile 302 is based on spectral data, the device profile processor 308 outputs spectral data. The device profile processor 308 can be configured for a variety of applications. For example, a user can select between absolute and relative colorimetrics and can configure observer, e.g., illuminant, conditions.
  • A PCS processor 310 receives the data output from the device profile processor 308 and a set of PCS parameters from an input 312. The PCS parameters may include, for example, XYZ tristimulus values for the media white, the illuminant white, and the black point, as well as blackpoint scaling from a perfect black to the media black. The PCS processor 310 generates the PCS values as a function of the data received from the device profile processor 308 and the PCS parameters.
  • FIG. 4 illustrates an example color transformer 400 implementing part of the color management system 200 of FIG. 2. A device link generator 402 receives as input at least one source profile and one destination profile. While FIG. 4 illustrates the device link generator 402 receiving a source device profile from a source profile interpreter 404 and a destination device profile from a destination profile interpreter 406, it should be understood that the device link generator 402 may also receive one or more device profiles that are intermediate between the source and destination device profiles. For example, a device profile characterizing an RGB monitor can be intermediate between a source device profile characterizing an RGB scanner and a destination device profile characterizing a CMYK printer. The source and destination device profiles are forward transforms and optionally include configurable observer conditions and PCS parameters. The device link generator 402 also receives a series of PCS parameters 408 to improve linking of different device types (e.g., CRT monitors and printers). The gamut mapping parameters 410 improve mapping of out of gamut colors between device types.
  • The device link generator 402 generates a color map or device profile link 412 that maps colors between two devices, e.g., from an RGB device to a CMYK device or between two CMYK devices. The device profile link 412 is, for example, a mathematical expression or a look-up table. The color transformer 400 optionally stores the device profile link 412 in a memory, such as a random access memory (RAM), or saves it as a file for multiple transformations between the source and destination device color spaces.
  • A device link calculator 414 receives source device coordinates from an input 416 and processes them using the device profile link 412. The device link calculator 414 uses a single forward calculation to transform the source device coordinates to a set of destination device coordinates for presentation at an output 418. Because the device link calculator 414 uses a single forward calculation, interpolation is relatively simple and easily optimized and the transformation process is relatively fast. If the device profile link 412 is a lookup table, the device link calculator 414 optionally uses linear interpolation to refine the destination device coordinates. The device link calculator 414 can be implemented, e.g., using a conventional multidimensional linear interpolator.
  • FIG. 5 illustrates an example device link generator 500 that implements part of the color transformer 400 of FIG. 4. The device link generator 500 includes a device link table builder 502 that creates a look-up table to enable rapid interpolation of destination device coordinates from source device coordinates. It should be understood that if the device profile link is a mathematical expression rather than as a look-up table, an analogous transformation generator replaces the device link table builder 502. Such a transformation builder may, for example, generate coefficients for use in the mathematical expression. To facilitate the discussion, however, the device link generator 500 is assumed to include a device link table builder 502. The device link table builder 502 generates the look-up table by generating a series of source device coordinates as input value entries and determining the optimal destination device coordinates as output values corresponding to the input values. The device link table builder 502 generates all combinations of source device coordinates using, for example, a series of nested loops, one loop for each dimension of the source device color coordinate space.
  • To reduce the computational and memory requirements for constructing and storing the look-up table, the look-up table typically contains a relatively small number of entries along each dimension. With a relatively small table, interpolation is used to convert source coordinates to destination coordinates. The total number of entries in the look-up table can be expressed as DdNs d, where d is the dimensionality of the source device color space, Dd is the dimensionality of the destination device color space, and N9 is the number of entries along each dimension of the look-up table. For example, a look-up table that is used to transform color coordinates between two CMYK (i.e., four dimensional) color spaces can contain 4×174, or 334,084 entries.
  • It should be understood that the look-up table need not have the same number of entries along each dimension. If the look-up table contains Nk entries along each respective dimension, where k ranges from 1 to d, the total number of entries in the look-up table can be expressed as
  • D D k = 1 d N k .
  • For example, a look-up table that is used to transform color coordinates between two CMYK color spaces and that is to have fifteen entries along three dimensions and seventeen entries along one dimension contains 4×15×15×15×17, or 229, 500 entries.
  • In application environments in which it is desirable to further reduce computational and memory requirements, the device link table builder 502 may select only a subset of the total number of entries in each dimension of the look-up table, perform the method loop calculations using that subset, and perform, for example, a spline interpolation to fill in the remaining entries of the look-up table.
  • The device link table builder 502 provides PCS parameters and source device coordinates to a source device profile interpreter 504. The source device profile interpreter 504 generates source PCS values and provides the source PCS values and the source device coordinates to an error reducer 506. In a specific embodiment, the error reducer 506 is implemented using an error minimization technique. Using the source device coordinates, the error reducer 506 estimates an initial set of destination coordinates that are likely to realize an accurate color match with the source device coordinates. This estimation process may be performed using a relatively simple technique. For example, for estimating destination coordinates in an RGB space corresponding to source coordinates in a CMYK color space, the estimation process may use the following equations:

  • C=1−R

  • M=1−G

  • Y=1−B
  • Alternatively, the source coordinates can be used to estimate the destination coordinates if the source and destination imaging systems use similar color coordinate spaces.
  • The error reducer 506 provides the set of estimated destination device coordinates to a destination device profile interpreter 508, which also receives the PCS parameters from the device link table builder 502. The destination device profile interpreter 508 then generates a set of destination PCS values as a function of the estimated destination device coordinates and the PCS parameters and provides the destination PCS values to the error reducer 506. If the error between the destination PCS values and the source PCS values is non-zero, the error reducer 506 uses an error reduction (e.g., an error minimization) technique to reduce the error between the source and destination PCS values. In one embodiment, this is implemented by repeatedly querying the destination device profile interpreter 508 with selected estimates of destination device coordinates. This process can continue until destination device coordinates are found that satisfy a quality threshold, for example, that yield the minimum error. The error reducer 506 returns these destination device coordinates to the device link table builder 502, which enters them in an appropriate location in the look-up table. The device link table builder 502 then enters the next set of table input entries corresponding to a set of source device color coordinates.
  • For colors within the gamut of the destination device, the error can be reduced using any of a variety of reduction techniques. For example, Powell's method can be used to perform the error reduction or error minimization. For additional information regarding Powell's method, reference may be made to William H. Press et al., Numerical Recipes in C (1992), pp. 309-315, available from Cambridge University Press, incorporated herein by reference, and attached hereto as Appendix A.
  • Using this approach, the error reducer 506 generally defines an error function having input parameters that can be varied by the error reduction technique. The error reducer 506 then determines the optimal values of the input parameters resulting in a minimal error. To determine the values of destination device coordinates using the minimum PCS error between the source and destination PCS values, the variable input parameters are the destination device coordinates. Accordingly, in this specific implementation, the error reducer 506 defines the error function as:

  • Error (D)=ΔE(R s ,R d(D))
  • where D is a vector defined by the destination device coordinates, Rs is a vector defined by the source PCS values and Rd(D) is a vector function producing destination PCS values as a function of the destination coordinate vector D, and ΔE is the Euclidean distance error between Rs and Rd(D). The Euclidean distance error may be expressed using the following equation:

  • ΔE(R 1 ,R 2)=√{square root over ((L 1 −L 2)2+(a 1 −a 2)2+(b 1 −b 2)2)}{square root over ((L 1 −L 2)2+(a 1 −a 2)2+(b 1 −b 2)2)}{square root over ((L 1 −L 2)2+(a 1 −a 2)2+(b 1 −b 2)2)}
  • The above equation assumes that the PCS is implemented as the CIELAB color space. It should be understood, however, that other color spaces may be used as a PCS. For example, one color space that is particularly suited for use as a PCS is described in the previously-referenced copending U.S. patent application Ser. No. 08/884,411 now U.S. Pat. No. 6,108,442, entitled “Characterization of Color Imaging Systems.”
  • Using this same approach, a non-zero optimal error indicates that the source device is out of gamut relative to the destination device at that location in the PCS. In such situations, the error reducer 506 optionally uses the destination device coordinates that result in a minimum ΔE value. Alternatively, the error reducer 506 may use these values as an initial estimate and recalculate the optimal destination device coordinates using a new error function that employs weighting factors, polar coordinates in the chromatic plane of the PCS space, or both.
  • The error reducer 506 optionally uses a gamut mapping parameter received from the device link table builder 502 to decide how to map coordinates that are out of gamut relative to the source device. For example, the gamut mapping parameter may specify modes in which each technique is used for obtaining destination device coordinates. One mode, for example, may use lightness, chroma, and hue values L*, C*, and h* instead of LAB values L*, a*, and b*, where:

  • √{square root over ((a*2+b*2))}

  • h*=C*ARCTAN(b*/a*).
  • Another mode uses the above lightness, chroma, and hue values as well as weighting factors:
  • Error ( D ) = Δ EW ( R s , R d ( D ) , W ) Δ EW ( R 1 , R 2 , W ) = W L ( L 1 - L 2 ) 2 + W C ( C 1 - C 2 ) 2 + W h ( h 1 - h 2 ) 2
  • where the PCS vectors Rs, Rd(D) are converted to lightness, chroma, and hue values either before or after passing them to the error function.
  • If the weighting factors are one, the above weighted error reduction function ΔEW ( ) is identical to the standard ΔE ( ) error reduction function. It should be noted, however, that weighting factors of WL=3, WC,=1, and Wh=1.5 yield particularly accurate visual results. These weighting factors produce an error function that gives priority first to lightness, then to hue, then to chroma. These weighting factors can also be provided to the error reducer 506 as gamut mapping parameters by the device link table builder 502.
  • Creating the device profile link via error reduction of the forward transformations of the devices realizes a number of advantages. For example, errors in color conversion are limited to those attributable to rounding and interpolation. As a result, the cumulative error from repeated forward and reverse transformations between the source and destination device color spaces is substantially reduced. Additionally, the color transformer can select the gamut mapping technique. The color transformer can rely on the forward transform information and realize consistent gamut mapping between device profiles supplied by different vendors. It should be noted that errors due to interpolation of the device profile link decrease as the number of table entries in each dimension of the look-up table increases toward the maximum number of gray levels. This error also decreases if a one-dimensional tone reproduction table is used to transform the color values. For additional information regarding the use of a one-dimensional tone reproduction table, reference is made to U.S. Pat. No. 5,432,906, issued to Gary H. Newman, assigned to Eastman Kodak Company, and incorporated by reference.
  • Creating the device profile link using error reduction also allows transformation between CMYK device spaces that maps the tone response of the source and destination black (K) channels while maintaining an accurate match with the L*a*b* data. For transformation from an RGB source device to a CMYK destination device, the RGB color coordinates used by the source device lack K channel information. Some conventional color transformation techniques use a process known as gray component removal (GCR) to define a relationship between K values and CMY values in the reverse transformation (i.e., L*a*b* to CMYK). For example, the reverse transformation may be performed with K initially set to zero. The value of K can then be calculated based on the minimum of the C, M, and Y values. The CMY values can then be recalculated using an algebraic calculation or using the forward model to obtain the closest value of L*a*b* input using the new calculated K value. This process involves a reverse transformation from L*a*b* color values to CMYK color values with a fixed definition of GCR.
  • This process, however, loses the K channel information or the CMY channel information during the translation between CMYK color spaces because the source color values are transformed to a three-dimensional intermediary color space during conversion to destination CMYK values. To preserve the K channel information, the error reducer 506 determines optimal K values in the destination color space that correspond to the K values in the source device color space, e.g., values between 0 and 255. These values can be created, for example, by generating a series of source K values ranging from minimum to maximum, fixing the source and destination CMY values at 0, and finding destination K values with minimum ΔE error relative to each of the source K values. These source and destination K values can be loaded into a lookup table for quick conversion of source K to destination K values. By using error reduction to determine optimal K values in the destination color space, the device link generator 500 preserves K channel information. This results in improved accuracy of the K channel information when converting colors between CMYK devices.
  • After loading the source and destination K values into a lookup table, when the error reducer 506 receives source L*a*b* and CMYK values, the error reducer 506 initially maps the source K channel to the destination K channel. The error reduction procedure is then used for varying the destination CMY values to obtain the best match for the respective L*a*b* values. If ΔE=0, control returns to the device link table builder 502, which enters the calculated destination CMYK values into the device link table. If ΔE is greater than zero, then the destination CMY values corresponding to the destination K value in question are out of gamut relative to the target L*a*b* values. This may be, for example, because the source CMY values corresponding to K=0 result in a color that is out of gamut with the destination device, or because the destination K value in the particular region of destination CMY color space is either too high or too low, i.e., the mixture of K with CMY is such that the resulting color is too dark or too light relative to the targeted L*a*b* value.
  • To reduce the ΔE error, K can be varied in a controlled way so as to ensure both optimal L*a*b* color and optimal matching of the K source channel behavior. This can be performed, for example, by alternately fixing the current CMY values while performing error reduction on variable K values and fixing the K value while performing error reduction on variable CMY values. When it is determined that neither varying CMY nor varying K improves the ΔE error, it can be assumed that the optimal CMYK values have been determined to satisfy both the color matching and K channel accuracy criteria. Control then optionally returns to the device link table builder 502. While the above discussion assumes that the error reducer 506 performs the mapping between source and destination K values, it should be understood that the device link table builder 502 can perform the mapping.
  • It should be understood that other approaches can be used to improve the accuracy of the K channel information. For example, the PCS can be implemented as a color space having the same number of dimensions, e.g., four, as CMYK space. Using a PCS having the same dimensionality as the device space prevents the loss of color channel information. In a specific example embodiment, the first three channels of this PCS are the PCS currently used by the system (e.g., LAB, L*a*b*, or XYZ). The fourth channel indicates a PCS value indicative of the black channel or relating to the black channel (e.g., L* or tristimulus value Y). The process can be performed in a manner similar to that performed by the ICC specification as in, for example, ColorSync 2.1 available from Apple Computer.
  • FIG. 6 illustrates an example color transformation method 600 according to the present invention. At a block 602, selected source device color coordinates are mapped to a PCS. Destination device color coordinates are then estimated as a function of the source device color coordinates, as depicted at a block 604. These estimated destination device color coordinates are then mapped to the PCS at a block 606.
  • At a block 608, an error between the PCS values corresponding to the source and destination device color coordinates is determined. At a decision block 610, the method determines whether the error satisfies a quality criterion, such as error minimization. In certain applications, the quality criterion can be defined as reduction of the error below a threshold value. If the error does not satisfy the quality criterion, flow proceeds to a block 612, at which the estimated destination device color coordinates are adjusted to reduce the error. This process repeats until the error is reduced.
  • After the error is reduced, flow proceeds to a block 614, at which the optimal destination device color coordinates thus obtained are entered into a color map. Next, the method determines whether the color map is filled, as depicted at a decision block 616. If the color map contains empty entries, flow proceeds to a block 618. New source device color coordinates are then selected, and then flow returns to the block 602. This process continues until the color map is filled. The color map can then be stored as, for example, a data file for future reference. The user can specify the desired source, destination, and intermediate profiles and the user preferences used to generate the device profile link. Upon recognizing that a color map has already been developed for a particular combination of these profiles, the system can load the data file. Loading the data file instead of reconstructing the color map saves computation time and other resources.
  • The device profile link can be generated each time the user requests a new combination of device profiles. Alternatively, the user can specify in advance a series of source, intermediate, and destination profiles and allow the system to preprocess these lists of profiles into their respective device profile links and store them. When the user requests that a particular transform be performed on image data using a previously defined combination of source, intermediate, and destination profiles, the system retrieves the associated device profile link. Retrieving the device profile link improves the processing speed.
  • While the above discussion has assumed that the device profile link describes a conversion between two device profiles, it should be understood that the device profile link can be used to describe a conversion between any number of device profiles. For example, N device profiles can be concatenated using a single device profile link. To concatenate the device profiles, the color conversion is performed using the PCS to convert colors between each device profile to be concatenated. Performing error reduction on the forward transforms between the individual device profiles improves the accuracy of the concatenated device profile link between the first and nth device profiles.
  • The various embodiments described above are provided by way of illustration only and should not be construed to limit the invention. Those skilled in the art will readily recognize various modifications and changes that may be made to the present invention without strictly following the example embodiments and applications illustrated and described herein, and without departing from the true spirit and scope of the present invention, which is set forth in the following claims.

Claims (19)

1. A method of performing color conversion between profiles, comprising:
comparing two sets of measured and reference data for at least one device corresponding to one of the profiles used in the color conversion, the data from the two sets of measured and reference data correspond to the same device values and are indicative of differences in behavior between a current state of the device and a reference state of the device in which at least one member of the set includes more than one non-zero value of colorants; and
performing one-dimensional corrections to one of the profiles in order to account for the differences between the measured and reference data sets prior to performing color conversion.
2. A method as defined in claim 1, wherein performing one-dimensional corrections includes applying a set of one-dimensional tables.
3. A method as defined in claim 1, wherein performing one-dimensional corrections includes applying corrections to an analytical model.
4. A method as defined in claim 1, wherein performing one-dimensional corrections includes applying corrections to a multidimensional look-up table.
5. A method as defined in claim 1, wherein the performing one-dimensional corrections is performed automatically.
6. A method as defined in claim 1, wherein the performing one-dimensional corrections is performed when a device profile is out of date.
7. A method as defined in claim 1, wherein the performing one-dimensional corrections is performed based on a schedule.
8. A device profile interpreter, comprising:
a memory having stored a device profile and raw spectral data;
a device profile processor coupled to the memory and including an input for receiving device coordinates; and
the device profile processor updates the device profile by performing error reduction using one-dimensional correction.
9. A device profile interpreter as defined in claim 8, wherein the error reduction performed by the device profile processor includes performing color conversion between profiles, including:
comparing two sets of measured and reference data for at least one device corresponding to one of the profiles used in the color conversion, the data from the two sets of measured and reference data correspond to the same device values and are indicative of differences in behavior between a current state of the device and a reference state of the device in which at least one member of the set includes more than one non-zero value of colorants; and
performing one-dimensional corrections to one of the profiles in order to account for the differences between the measured and reference data sets prior to performing color conversion.
10. A device profile interpreter as defined in claim 9, wherein performing one-dimensional corrections includes applying a set of one-dimensional tables.
11. A device profile interpreter as defined in claim 9, wherein performing one-dimensional corrections includes applying corrections to an analytical model.
12. A device profile interpreter as defined in claim 9, wherein performing one-dimensional corrections includes applying corrections to a multidimensional look-up table.
13. A device profile interpreter as defined in claim 9, wherein the performing one-dimensional corrections is performed automatically.
14. A device profile interpreter as defined in claim 9, wherein performing one-dimensional corrections is performed when a device profile is out of date.
15. A device profile interpreter as defined in claim 9, wherein performing one-dimensional corrections is performed based on a schedule.
16. A method for updating a device profile that is used to convert device color coordinates to profile connecting space (PCS) coordinates, comprising:
performing error reduction on each channel of a look-up table;
constructing an updated device profile using the error reduced look-up table.
17. A method as defined in claim 16, wherein the error reduction includes applying a set of one-dimensional tables.
18. A method as defined in claim 16, wherein the error reduction is applied directly to an analytical model.
19. A method as defined 16, wherein the error reduction is applied directly to a multidimensional look-up table.
US12/020,181 1997-06-27 2008-01-25 Method for mapping colors between imaging systems and method therefor Abandoned US20080136836A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US08/884,411 US6108442A (en) 1997-06-27 1997-06-27 Characterization of color imaging systems
US08/882,561 US6088038A (en) 1997-07-03 1997-07-03 Arrangement for mapping colors between imaging systems and method therefor
US09/536,366 US7382379B1 (en) 1997-06-27 2000-03-27 Arrangement for mapping colors between imaging systems and method thereof
US12/020,181 US20080136836A1 (en) 1997-06-27 2008-01-25 Method for mapping colors between imaging systems and method therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/020,181 US20080136836A1 (en) 1997-06-27 2008-01-25 Method for mapping colors between imaging systems and method therefor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US09/536,366 Division US7382379B1 (en) 1997-06-27 2000-03-27 Arrangement for mapping colors between imaging systems and method thereof

Publications (1)

Publication Number Publication Date
US20080136836A1 true US20080136836A1 (en) 2008-06-12

Family

ID=39416488

Family Applications (6)

Application Number Title Priority Date Filing Date
US09/536,366 Expired - Fee Related US7382379B1 (en) 1997-06-27 2000-03-27 Arrangement for mapping colors between imaging systems and method thereof
US11/611,190 Abandoned US20070080974A1 (en) 1997-06-27 2006-12-15 Arrangement for mapping colors between imaging systems and method therefor
US12/020,108 Abandoned US20080117227A1 (en) 1997-06-27 2008-01-25 Method for mapping colors between imaging systems and method therefor
US12/020,181 Abandoned US20080136836A1 (en) 1997-06-27 2008-01-25 Method for mapping colors between imaging systems and method therefor
US12/020,155 Abandoned US20080150960A1 (en) 1997-06-27 2008-01-25 Method for mapping colors between imaging sytems and method therefor
US12/020,062 Abandoned US20080117226A1 (en) 1997-06-27 2008-01-25 Method for mapping colors between imaging systems and method therefor

Family Applications Before (3)

Application Number Title Priority Date Filing Date
US09/536,366 Expired - Fee Related US7382379B1 (en) 1997-06-27 2000-03-27 Arrangement for mapping colors between imaging systems and method thereof
US11/611,190 Abandoned US20070080974A1 (en) 1997-06-27 2006-12-15 Arrangement for mapping colors between imaging systems and method therefor
US12/020,108 Abandoned US20080117227A1 (en) 1997-06-27 2008-01-25 Method for mapping colors between imaging systems and method therefor

Family Applications After (2)

Application Number Title Priority Date Filing Date
US12/020,155 Abandoned US20080150960A1 (en) 1997-06-27 2008-01-25 Method for mapping colors between imaging sytems and method therefor
US12/020,062 Abandoned US20080117226A1 (en) 1997-06-27 2008-01-25 Method for mapping colors between imaging systems and method therefor

Country Status (1)

Country Link
US (6) US7382379B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060197775A1 (en) * 2005-03-07 2006-09-07 Michael Neal Virtual monitor system having lab-quality color accuracy
US20090284764A1 (en) * 2008-05-19 2009-11-19 Canon Kabushiki Kaisha Plug-in for customized device model with interface for device profiler and for color management system
US20170131147A1 (en) * 2015-05-01 2017-05-11 Variable, Inc. Intelligent alignment system and method for color sensing devices

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1569471B1 (en) * 2003-02-27 2012-08-08 Seiko Epson Corporation Image reproduction using specific color space
KR100636136B1 (en) * 2004-01-29 2006-10-19 삼성전자주식회사 Method and apparatus generating an image formation data by color profile matched with image application
JP4096892B2 (en) * 2004-02-19 2008-06-04 セイコーエプソン株式会社 Color matching profile creation device, color matching system, color matching method, color matching program, and electronic device
KR20050109663A (en) * 2004-05-17 2005-11-22 삼성전자주식회사 Method and apparatus for creating profile
JP2005340926A (en) * 2004-05-24 2005-12-08 Canon Inc Image processing method in image processing apparatus, and image processing apparatus
JP4540492B2 (en) * 2005-01-28 2010-09-08 Hoya株式会社 Color conversion matrix calculation method and image signal processing apparatus
DE102006002886A1 (en) * 2006-01-20 2007-07-26 Oce Printing Systems Gmbh Producing and processing method for document data stream involves assigning indexed color management resource to document data stream, with which color based data of document data stream are assigned to given color palette
US7755637B2 (en) * 2006-07-14 2010-07-13 Canon Kabushiki Kaisha Initialization of color appearance model
US7945093B2 (en) * 2008-01-16 2011-05-17 Eastman Kodak Company Simplified color workflow
US8681401B2 (en) * 2008-09-29 2014-03-25 Eastman Kodak Company Method for optimizing display profiles
US20100079828A1 (en) * 2008-09-29 2010-04-01 Edge Christopher J Method for optimizing display profiles to simulate the metameric effects of custom illumination
JP5329920B2 (en) * 2008-10-30 2013-10-30 キヤノン株式会社 Color processing apparatus and method
US8270029B2 (en) * 2009-03-09 2012-09-18 Xerox Corporation Methods, apparatus and systems for using black-only on the neutral axis in color management profiles
US8493403B2 (en) * 2009-09-04 2013-07-23 Hewlett-Packard Development Company, L.P. Color transformation sample point identification
US8610948B2 (en) * 2009-11-24 2013-12-17 Canon Kabushiki Kaisha Spectral gamut mapping by constrained subdivision of gamut
US8542402B2 (en) * 2009-12-18 2013-09-24 Canon Kabushiki Kaisha Selection of samples for spanning a spectral gamut
ES2394585B1 (en) * 2010-05-18 2013-09-03 Univ Extremadura Procedure for the development of a test for the detection of daltonism through portable video game consoles.
DE112011104695B4 (en) 2011-02-02 2020-01-23 Hewlett-Packard Development Company, L.P. Providing an image data structure for use in creating proofs
TWI538474B (en) 2011-03-15 2016-06-11 杜比實驗室特許公司 Methods and apparatus for image data transformation
CN102740463A (en) 2011-03-31 2012-10-17 上海贝尔股份有限公司 Method, device, base station and user equipment for reducing interference in wireless communication system
KR20190086036A (en) 2011-05-27 2019-07-19 돌비 레버러토리즈 라이쎈싱 코오포레이션 Scalable systems for controlling color management comprising varying levels of metadata
US9024961B2 (en) 2011-12-19 2015-05-05 Dolby Laboratories Licensing Corporation Color grading apparatus and methods
US9076367B2 (en) * 2012-09-07 2015-07-07 Apple Inc. Color management for web server based applications
US9621764B2 (en) 2013-07-31 2017-04-11 Hewlett-Packard Development Company, L.P. Printer cartridge and memory device containing a compressed color table
TW201819108A (en) * 2016-08-26 2018-06-01 美商應用材料股份有限公司 Thickness measurement of substrate using color metrology
JP2019087777A (en) 2017-11-01 2019-06-06 セイコーエプソン株式会社 Profile adjustment method, profile adjustment program, profile adjustment apparatus, and profile adjustment system

Citations (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US523684A (en) * 1894-07-31 System
US3612753A (en) * 1969-04-23 1971-10-12 Ventures Res & Dev Self-adaptive system for the reproduction of color
US3893166A (en) * 1972-01-05 1975-07-01 Crosfield Electronics Ltd Colour correcting image reproducing methods and apparatus
US4482917A (en) * 1981-03-11 1984-11-13 Dr. Ing. Rudolf Hell Gmbh Method for a reproduction of colored masters in four-color printing using color reduction
US4500919A (en) * 1982-05-04 1985-02-19 Massachusetts Institute Of Technology Color reproduction system
US4884130A (en) * 1988-04-29 1989-11-28 Minnesota Mining And Manufacturing Company Method of describing a color in a triaxial planar vector color space
US5012431A (en) * 1988-03-31 1991-04-30 Colwell/General, Inc. Objective color notation system
US5105267A (en) * 1988-09-26 1992-04-14 Ricoh Company, Ltd. Color conversion apparatus
US5305119A (en) * 1992-10-01 1994-04-19 Xerox Corporation Color printer calibration architecture
US5339176A (en) * 1990-02-05 1994-08-16 Scitex Corporation Ltd. Apparatus and method for color calibration
US5341464A (en) * 1992-12-23 1994-08-23 Microsoft Corporation Luminance emphasized color image rendering
US5377025A (en) * 1992-11-24 1994-12-27 Eastman Kodak Company Optimal color quantization for addressing multi-dimensional color calibration look-up-table
US5402253A (en) * 1992-08-20 1995-03-28 Fuji Xerox Co., Ltd. Color conversion method and apparatus with a variable gray component replacement ratio
US5416890A (en) * 1991-12-11 1995-05-16 Xerox Corporation Graphical user interface for controlling color gamut clipping
US5432906A (en) * 1990-09-28 1995-07-11 Eastman Kodak Company Color image processing system for preparing a composite image transformation module for performing a plurality of selected image transformations
US5506696A (en) * 1994-08-10 1996-04-09 Toyo Ink Manufacturing Co., Ltd. Color image reproduction system having color analysis function performed with a neural network system
US5526285A (en) * 1993-10-04 1996-06-11 General Electric Company Imaging color sensor
US5526140A (en) * 1995-03-03 1996-06-11 Minnesota Mining And Manufacturing Company Emulation of a halftone printed image on a continuous-tone device
US5531520A (en) * 1994-09-01 1996-07-02 Massachusetts Institute Of Technology System and method of registration of three-dimensional data sets including anatomical body data
US5541742A (en) * 1991-12-03 1996-07-30 Ricoh Company, Ltd. Color correction system for transforming color image from one color space to another
US5563725A (en) * 1992-02-27 1996-10-08 Canon Kabushiki Kaisha Color image processing apparatus for processing image data based on a display characteristic of a monitor
US5564006A (en) * 1990-06-01 1996-10-08 Cymbolic Sciences International, Inc. Real time transformation between color spaces
US5579031A (en) * 1992-12-15 1996-11-26 E. I. Du Pont De Nemours And Company Color matching method and apparatus
US5634092A (en) * 1994-09-30 1997-05-27 Apple Computer, Inc. Color image processing system which provides multiple image processing operations through a single interface
US5656752A (en) * 1993-03-30 1997-08-12 Basf Aktiengesellschaft Preparation of naphthalocyanines
US5668596A (en) * 1996-02-29 1997-09-16 Eastman Kodak Company Digital imaging device optimized for color performance
US5732205A (en) * 1994-12-30 1998-03-24 Intel Corporation Color conversion using 4.5 bit palette
US5754184A (en) * 1993-01-06 1998-05-19 Eastman Kodak Company Digital color system and method which provides a visual match across different input and output viewing conditions
US5760913A (en) * 1996-02-12 1998-06-02 Splash Technology, Inc. Color calibration method and system having independent color scanner profiles
US5786823A (en) * 1993-05-07 1998-07-28 Eastman Kodak Company Method and apparatus employing composite transforms of intermediary image data metrics for achieving imaging device/media compatibility and color appearance matching
US5806081A (en) * 1994-07-01 1998-09-08 Apple Computer Inc. Method and system for embedding a device profile into a document and extracting a device profile from a document in a color management system
US5835627A (en) * 1995-05-15 1998-11-10 Higgins; Eric W. System and method for automatically optimizing image quality and processing time
US5857063A (en) * 1997-03-27 1999-01-05 Eastman Kodak Company Multicolorant process control
US5880738A (en) * 1994-08-11 1999-03-09 Canon Information Systems Research Australia Pty Ltd. Color mapping system utilizing weighted distance error measure
US5883632A (en) * 1992-05-04 1999-03-16 Hewlett-Packard Company Coordinating color produced by two devices--using a hue-controlled machine color space, or surface scaling
US5903275A (en) * 1994-02-16 1999-05-11 Apple Computer, Inc. Subjectively pleasing color gamut mapping in a color computer graphics system
US5909291A (en) * 1992-03-19 1999-06-01 Apple Computer, Inc. Color matching apparatus and method
US5949427A (en) * 1993-01-07 1999-09-07 Canon Kabushiki Kaisha Color image processing apparatus and method and color image output apparatus each using a color matching/processing method based on the color imput
US5956467A (en) * 1996-12-17 1999-09-21 Eastman Kodak Company Encoding color image data for multipass color printers
US5963201A (en) * 1992-05-11 1999-10-05 Apple Computer, Inc. Color processing system
US5999703A (en) * 1997-03-27 1999-12-07 Eastman Kodak Company Computer program product for modifying the black channel of an output device profile without altering its colorimetric accuracy
US6011540A (en) * 1997-03-28 2000-01-04 Sun Microsystems, Inc. Method and apparatus for generating small, optimized color look-up tables
US6025885A (en) * 1995-02-24 2000-02-15 Ldt-Gmbh & Co. Laser-Display-Technologie Kg Process for color transformation and a color video system
US6037950A (en) * 1997-04-18 2000-03-14 Polaroid Corporation Configurable, extensible, integrated profile generation and maintenance environment for facilitating image transfer between transform spaces
US6044173A (en) * 1994-01-31 2000-03-28 Canon Kabushiki Kaisha Image processing apparatus and method
US6064396A (en) * 1994-10-24 2000-05-16 Ricoh Company, Ltd. Two-step gamma correction method and system
US6072901A (en) * 1997-05-30 2000-06-06 Polaroid Corporation System and method for deriving an invertible relationship between color spaces where the intrinsic mapping is one-to-many for use in a color profile production system
US6088038A (en) * 1997-07-03 2000-07-11 Minnesota Mining And Manufacturing Company Arrangement for mapping colors between imaging systems and method therefor
US6108008A (en) * 1994-09-22 2000-08-22 Canon Kabushiki Kaisha Color image mapping within output device reproduction range
US6137595A (en) * 1997-04-17 2000-10-24 Ricoh Company, Ltd. Color conversion processing method for color matching and a processor readable medium storing a program for implementing the color conversion processing method
US6157735A (en) * 1996-02-26 2000-12-05 Holub; Richard A. System for distributing controlling color reproduction at multiple sites
US6232954B1 (en) * 1997-05-08 2001-05-15 Imation Corp. Arrangement for high-accuracy colorimetric characterization of display devices and method therefor
US6249315B1 (en) * 1997-03-24 2001-06-19 Jack M. Holm Strategy for pictorial digital image processing
US6307961B1 (en) * 1997-07-31 2001-10-23 Pgi Graphics Imaging Llc User-interactive corrective tuning of color profiles
US6330572B1 (en) * 1998-07-15 2001-12-11 Imation Corp. Hierarchical data storage management
US6337922B2 (en) * 1997-01-16 2002-01-08 Canon Kabushiki Kaisha Image process method, image process apparatus and storage medium
US6362808B1 (en) * 1997-07-03 2002-03-26 Minnesota Mining And Manufacturing Company Arrangement for mapping colors between imaging systems and method therefor
US6388674B1 (en) * 1998-05-28 2002-05-14 Sony Corporation Gamut mapping method and apparatus
US20020060796A1 (en) * 1993-12-17 2002-05-23 Akiko Kanno Apparatus and method for processing color image
US6400843B1 (en) * 1999-04-22 2002-06-04 Seiko Epson Corporation Color image reproduction with accurate inside-gamut colors and enhanced outside-gamut colors
US6430311B1 (en) * 1997-01-31 2002-08-06 Canon Kabushiki Kaisha Image processing apparatus and method
US6646752B2 (en) * 2002-02-22 2003-11-11 Taiwan Semiconductor Manufacturing Co. Ltd Method and apparatus for measuring thickness of a thin oxide layer

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4884221A (en) 1986-04-14 1989-11-28 Minolta Camera Kabushiki Kaisha Color measuring apparatus
US5233684A (en) 1990-06-26 1993-08-03 Digital Equipment Corporation Method and apparatus for mapping a digital color image from a first color space to a second color space
US5479189A (en) * 1991-02-28 1995-12-26 Chesavage; Jay 4 channel color display adapter and method for color correction
AU662412B2 (en) 1992-04-02 1995-08-31 Minnesota Mining And Manufacturing Company Color correction with a four-dimensional look-up table
BE1006960A5 (en) 1993-04-30 1995-01-31 Barco Graphics Nv Method and apparatus for the generation of pressure data.
EP0674430A1 (en) 1994-03-24 1995-09-27 Eastman Kodak Company Method and apparatus for interactive color transformation of color values between color spaces
US5608548A (en) * 1994-12-23 1997-03-04 Hewlett-Packard Company Automatic color adjustment in a document processing environment
US5646752A (en) * 1995-09-15 1997-07-08 Canon Information Systems, Inc. Color image processing apparatus which uses private tags to alter a predefined color transformation sequence of a device profile
US6707938B2 (en) * 2000-12-06 2004-03-16 Xerox Corporation Principal axis look-up for color correction
US6584903B2 (en) * 2000-12-12 2003-07-01 Xerox Corporation Color digital front end decomposer output to multiple color spaces with actual output optionally being determined by input color spaces
TW575190U (en) * 2003-02-14 2004-02-01 Hon Hai Prec Ind Co Ltd Optical subassembly

Patent Citations (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US523684A (en) * 1894-07-31 System
US3612753A (en) * 1969-04-23 1971-10-12 Ventures Res & Dev Self-adaptive system for the reproduction of color
US3893166A (en) * 1972-01-05 1975-07-01 Crosfield Electronics Ltd Colour correcting image reproducing methods and apparatus
US4482917A (en) * 1981-03-11 1984-11-13 Dr. Ing. Rudolf Hell Gmbh Method for a reproduction of colored masters in four-color printing using color reduction
US4500919A (en) * 1982-05-04 1985-02-19 Massachusetts Institute Of Technology Color reproduction system
US5012431A (en) * 1988-03-31 1991-04-30 Colwell/General, Inc. Objective color notation system
US4884130A (en) * 1988-04-29 1989-11-28 Minnesota Mining And Manufacturing Company Method of describing a color in a triaxial planar vector color space
US5105267A (en) * 1988-09-26 1992-04-14 Ricoh Company, Ltd. Color conversion apparatus
US5339176A (en) * 1990-02-05 1994-08-16 Scitex Corporation Ltd. Apparatus and method for color calibration
US5564006A (en) * 1990-06-01 1996-10-08 Cymbolic Sciences International, Inc. Real time transformation between color spaces
US5432906A (en) * 1990-09-28 1995-07-11 Eastman Kodak Company Color image processing system for preparing a composite image transformation module for performing a plurality of selected image transformations
US5541742A (en) * 1991-12-03 1996-07-30 Ricoh Company, Ltd. Color correction system for transforming color image from one color space to another
US5416890A (en) * 1991-12-11 1995-05-16 Xerox Corporation Graphical user interface for controlling color gamut clipping
US5563725A (en) * 1992-02-27 1996-10-08 Canon Kabushiki Kaisha Color image processing apparatus for processing image data based on a display characteristic of a monitor
US5909291A (en) * 1992-03-19 1999-06-01 Apple Computer, Inc. Color matching apparatus and method
US5883632A (en) * 1992-05-04 1999-03-16 Hewlett-Packard Company Coordinating color produced by two devices--using a hue-controlled machine color space, or surface scaling
US5963201A (en) * 1992-05-11 1999-10-05 Apple Computer, Inc. Color processing system
US5402253A (en) * 1992-08-20 1995-03-28 Fuji Xerox Co., Ltd. Color conversion method and apparatus with a variable gray component replacement ratio
US5305119A (en) * 1992-10-01 1994-04-19 Xerox Corporation Color printer calibration architecture
US5528386A (en) * 1992-10-01 1996-06-18 Rolleston; Robert J. Color printer calibration architecture
US5377025A (en) * 1992-11-24 1994-12-27 Eastman Kodak Company Optimal color quantization for addressing multi-dimensional color calibration look-up-table
US5579031A (en) * 1992-12-15 1996-11-26 E. I. Du Pont De Nemours And Company Color matching method and apparatus
US5341464A (en) * 1992-12-23 1994-08-23 Microsoft Corporation Luminance emphasized color image rendering
US5754184A (en) * 1993-01-06 1998-05-19 Eastman Kodak Company Digital color system and method which provides a visual match across different input and output viewing conditions
US5949427A (en) * 1993-01-07 1999-09-07 Canon Kabushiki Kaisha Color image processing apparatus and method and color image output apparatus each using a color matching/processing method based on the color imput
US5656752A (en) * 1993-03-30 1997-08-12 Basf Aktiengesellschaft Preparation of naphthalocyanines
US5786823A (en) * 1993-05-07 1998-07-28 Eastman Kodak Company Method and apparatus employing composite transforms of intermediary image data metrics for achieving imaging device/media compatibility and color appearance matching
US5526285A (en) * 1993-10-04 1996-06-11 General Electric Company Imaging color sensor
US20020060796A1 (en) * 1993-12-17 2002-05-23 Akiko Kanno Apparatus and method for processing color image
US6044173A (en) * 1994-01-31 2000-03-28 Canon Kabushiki Kaisha Image processing apparatus and method
US5903275A (en) * 1994-02-16 1999-05-11 Apple Computer, Inc. Subjectively pleasing color gamut mapping in a color computer graphics system
US5806081A (en) * 1994-07-01 1998-09-08 Apple Computer Inc. Method and system for embedding a device profile into a document and extracting a device profile from a document in a color management system
US5506696A (en) * 1994-08-10 1996-04-09 Toyo Ink Manufacturing Co., Ltd. Color image reproduction system having color analysis function performed with a neural network system
US5880738A (en) * 1994-08-11 1999-03-09 Canon Information Systems Research Australia Pty Ltd. Color mapping system utilizing weighted distance error measure
US5531520A (en) * 1994-09-01 1996-07-02 Massachusetts Institute Of Technology System and method of registration of three-dimensional data sets including anatomical body data
US6108008A (en) * 1994-09-22 2000-08-22 Canon Kabushiki Kaisha Color image mapping within output device reproduction range
US5634092A (en) * 1994-09-30 1997-05-27 Apple Computer, Inc. Color image processing system which provides multiple image processing operations through a single interface
US6064396A (en) * 1994-10-24 2000-05-16 Ricoh Company, Ltd. Two-step gamma correction method and system
US5732205A (en) * 1994-12-30 1998-03-24 Intel Corporation Color conversion using 4.5 bit palette
US6025885A (en) * 1995-02-24 2000-02-15 Ldt-Gmbh & Co. Laser-Display-Technologie Kg Process for color transformation and a color video system
US5526140A (en) * 1995-03-03 1996-06-11 Minnesota Mining And Manufacturing Company Emulation of a halftone printed image on a continuous-tone device
US5835627A (en) * 1995-05-15 1998-11-10 Higgins; Eric W. System and method for automatically optimizing image quality and processing time
US5760913A (en) * 1996-02-12 1998-06-02 Splash Technology, Inc. Color calibration method and system having independent color scanner profiles
US6157735A (en) * 1996-02-26 2000-12-05 Holub; Richard A. System for distributing controlling color reproduction at multiple sites
US5668596A (en) * 1996-02-29 1997-09-16 Eastman Kodak Company Digital imaging device optimized for color performance
US5956467A (en) * 1996-12-17 1999-09-21 Eastman Kodak Company Encoding color image data for multipass color printers
US6337922B2 (en) * 1997-01-16 2002-01-08 Canon Kabushiki Kaisha Image process method, image process apparatus and storage medium
US6430311B1 (en) * 1997-01-31 2002-08-06 Canon Kabushiki Kaisha Image processing apparatus and method
US6249315B1 (en) * 1997-03-24 2001-06-19 Jack M. Holm Strategy for pictorial digital image processing
US5999703A (en) * 1997-03-27 1999-12-07 Eastman Kodak Company Computer program product for modifying the black channel of an output device profile without altering its colorimetric accuracy
US5857063A (en) * 1997-03-27 1999-01-05 Eastman Kodak Company Multicolorant process control
US6011540A (en) * 1997-03-28 2000-01-04 Sun Microsystems, Inc. Method and apparatus for generating small, optimized color look-up tables
US6137595A (en) * 1997-04-17 2000-10-24 Ricoh Company, Ltd. Color conversion processing method for color matching and a processor readable medium storing a program for implementing the color conversion processing method
US6037950A (en) * 1997-04-18 2000-03-14 Polaroid Corporation Configurable, extensible, integrated profile generation and maintenance environment for facilitating image transfer between transform spaces
US6232954B1 (en) * 1997-05-08 2001-05-15 Imation Corp. Arrangement for high-accuracy colorimetric characterization of display devices and method therefor
US6072901A (en) * 1997-05-30 2000-06-06 Polaroid Corporation System and method for deriving an invertible relationship between color spaces where the intrinsic mapping is one-to-many for use in a color profile production system
US6088038A (en) * 1997-07-03 2000-07-11 Minnesota Mining And Manufacturing Company Arrangement for mapping colors between imaging systems and method therefor
US6362808B1 (en) * 1997-07-03 2002-03-26 Minnesota Mining And Manufacturing Company Arrangement for mapping colors between imaging systems and method therefor
USRE39161E1 (en) * 1997-07-03 2006-07-11 Eastman Kodak Company Arrangement for mapping colors between imaging systems and method therefor
US6307961B1 (en) * 1997-07-31 2001-10-23 Pgi Graphics Imaging Llc User-interactive corrective tuning of color profiles
US6388674B1 (en) * 1998-05-28 2002-05-14 Sony Corporation Gamut mapping method and apparatus
US6330572B1 (en) * 1998-07-15 2001-12-11 Imation Corp. Hierarchical data storage management
US6400843B1 (en) * 1999-04-22 2002-06-04 Seiko Epson Corporation Color image reproduction with accurate inside-gamut colors and enhanced outside-gamut colors
US6646752B2 (en) * 2002-02-22 2003-11-11 Taiwan Semiconductor Manufacturing Co. Ltd Method and apparatus for measuring thickness of a thin oxide layer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060197775A1 (en) * 2005-03-07 2006-09-07 Michael Neal Virtual monitor system having lab-quality color accuracy
US20090284764A1 (en) * 2008-05-19 2009-11-19 Canon Kabushiki Kaisha Plug-in for customized device model with interface for device profiler and for color management system
US7978369B2 (en) * 2008-05-19 2011-07-12 Canon Kabushiki Kaisha Plug-in for customized device model with interface for device profiler and for color management system
US20170131147A1 (en) * 2015-05-01 2017-05-11 Variable, Inc. Intelligent alignment system and method for color sensing devices
US10156477B2 (en) * 2015-05-01 2018-12-18 Variable, Inc. Intelligent alignment system and method for color sensing devices

Also Published As

Publication number Publication date
US7382379B1 (en) 2008-06-03
US20080150960A1 (en) 2008-06-26
US20080117226A1 (en) 2008-05-22
US20080117227A1 (en) 2008-05-22
US20070080974A1 (en) 2007-04-12

Similar Documents

Publication Publication Date Title
US9674400B2 (en) Image data clustering and color conversion
DE60033713T2 (en) Image processing and color conversion
US6225974B1 (en) Gamut correction with color separation and methods and apparatuses for performing same
US6297826B1 (en) Method of converting color data
Vrhel et al. Color device calibration: A mathematical formulation
US7599551B2 (en) Color correction device and color correction method
DE60214984T2 (en) Correction procedure for working with digital sample training
US7158146B2 (en) Image processing apparatus and method
US7403315B2 (en) Color conversion definition creating method, color conversion definition creating apparatus, and color conversion definition creating program storage medium
US6719392B2 (en) Optimized color ranges in gamut mapping
US6008907A (en) Printer calibration
US6023527A (en) Method and system of selecting a color space mapping technique for an output color space
US5333069A (en) Technique for use in conjunction with an imaging system for providing an appearance match between two images and for calibrating the system thereto
EP1156668B1 (en) Black generation for color management system
US5539540A (en) Method and associated apparatus for transforming input color values in an input color space to output color values in an output color space
EP0681396B1 (en) Method and apparatus for calibrating a four color printer
US7796296B2 (en) Personalized color reproduction
KR100938846B1 (en) Color conversion apparatus and method of using the same
US7215343B2 (en) Color correction using a device-dependent display profile
EP0606841B1 (en) Method for color image reproduction
JP3841151B2 (en) Image processing apparatus, image processing method, program, and recording medium
US7583420B2 (en) Image processing method and apparatus
US7463386B2 (en) Color processing device and its method
US6542634B1 (en) Image processing apparatus and method, and profile generating method
US7136523B2 (en) Color correction table forming method and apparatus, control program and storage medium

Legal Events

Date Code Title Description
AS Assignment

Owner name: CITICORP NORTH AMERICA, INC., AS AGENT, NEW YORK

Free format text: SECURITY INTEREST;ASSIGNORS:EASTMAN KODAK COMPANY;PAKON, INC.;REEL/FRAME:028201/0420

Effective date: 20120215

AS Assignment

Owner name: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS AGENT, MINNESOTA

Free format text: PATENT SECURITY AGREEMENT;ASSIGNORS:EASTMAN KODAK COMPANY;PAKON, INC.;REEL/FRAME:030122/0235

Effective date: 20130322

Owner name: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS AGENT,

Free format text: PATENT SECURITY AGREEMENT;ASSIGNORS:EASTMAN KODAK COMPANY;PAKON, INC.;REEL/FRAME:030122/0235

Effective date: 20130322

AS Assignment

Owner name: BANK OF AMERICA N.A., AS AGENT, MASSACHUSETTS

Free format text: INTELLECTUAL PROPERTY SECURITY AGREEMENT (ABL);ASSIGNORS:EASTMAN KODAK COMPANY;FAR EAST DEVELOPMENT LTD.;FPC INC.;AND OTHERS;REEL/FRAME:031162/0117

Effective date: 20130903

Owner name: BARCLAYS BANK PLC, AS ADMINISTRATIVE AGENT, NEW YORK

Free format text: INTELLECTUAL PROPERTY SECURITY AGREEMENT (SECOND LIEN);ASSIGNORS:EASTMAN KODAK COMPANY;FAR EAST DEVELOPMENT LTD.;FPC INC.;AND OTHERS;REEL/FRAME:031159/0001

Effective date: 20130903

Owner name: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE, DELAWARE

Free format text: INTELLECTUAL PROPERTY SECURITY AGREEMENT (FIRST LIEN);ASSIGNORS:EASTMAN KODAK COMPANY;FAR EAST DEVELOPMENT LTD.;FPC INC.;AND OTHERS;REEL/FRAME:031158/0001

Effective date: 20130903

Owner name: BARCLAYS BANK PLC, AS ADMINISTRATIVE AGENT, NEW YO

Free format text: INTELLECTUAL PROPERTY SECURITY AGREEMENT (SECOND LIEN);ASSIGNORS:EASTMAN KODAK COMPANY;FAR EAST DEVELOPMENT LTD.;FPC INC.;AND OTHERS;REEL/FRAME:031159/0001

Effective date: 20130903

Owner name: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE, DELA

Free format text: INTELLECTUAL PROPERTY SECURITY AGREEMENT (FIRST LIEN);ASSIGNORS:EASTMAN KODAK COMPANY;FAR EAST DEVELOPMENT LTD.;FPC INC.;AND OTHERS;REEL/FRAME:031158/0001

Effective date: 20130903

Owner name: EASTMAN KODAK COMPANY, NEW YORK

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS;ASSIGNORS:CITICORP NORTH AMERICA, INC., AS SENIOR DIP AGENT;WILMINGTON TRUST, NATIONAL ASSOCIATION, AS JUNIOR DIP AGENT;REEL/FRAME:031157/0451

Effective date: 20130903

Owner name: PAKON, INC., NEW YORK

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS;ASSIGNORS:CITICORP NORTH AMERICA, INC., AS SENIOR DIP AGENT;WILMINGTON TRUST, NATIONAL ASSOCIATION, AS JUNIOR DIP AGENT;REEL/FRAME:031157/0451

Effective date: 20130903

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION

AS Assignment

Owner name: KODAK IMAGING NETWORK, INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: KODAK PORTUGUESA LIMITED, NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: KODAK PHILIPPINES, LTD., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: NPEC, INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: KODAK AMERICAS, LTD., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: EASTMAN KODAK COMPANY, NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: KODAK (NEAR EAST), INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: FPC, INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: LASER PACIFIC MEDIA CORPORATION, NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: CREO MANUFACTURING AMERICA LLC, NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: FAR EAST DEVELOPMENT LTD., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: KODAK AVIATION LEASING LLC, NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: PAKON, INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: QUALEX, INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

Owner name: KODAK REALTY, INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JP MORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:049814/0001

Effective date: 20190617

AS Assignment

Owner name: QUALEX INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BARCLAYS BANK PLC;REEL/FRAME:052773/0001

Effective date: 20170202

Owner name: KODAK AMERICAS LTD., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BARCLAYS BANK PLC;REEL/FRAME:052773/0001

Effective date: 20170202

Owner name: KODAK PHILIPPINES LTD., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BARCLAYS BANK PLC;REEL/FRAME:052773/0001

Effective date: 20170202

Owner name: KODAK REALTY INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BARCLAYS BANK PLC;REEL/FRAME:052773/0001

Effective date: 20170202

Owner name: EASTMAN KODAK COMPANY, NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BARCLAYS BANK PLC;REEL/FRAME:052773/0001

Effective date: 20170202

Owner name: FAR EAST DEVELOPMENT LTD., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BARCLAYS BANK PLC;REEL/FRAME:052773/0001

Effective date: 20170202

Owner name: NPEC INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BARCLAYS BANK PLC;REEL/FRAME:052773/0001

Effective date: 20170202

Owner name: FPC INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BARCLAYS BANK PLC;REEL/FRAME:052773/0001

Effective date: 20170202

Owner name: LASER PACIFIC MEDIA CORPORATION, NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BARCLAYS BANK PLC;REEL/FRAME:052773/0001

Effective date: 20170202

Owner name: KODAK (NEAR EAST) INC., NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BARCLAYS BANK PLC;REEL/FRAME:052773/0001

Effective date: 20170202