InterColor Profile Format - CiteSeerX

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InterColor Profile Format Specification Version 3.0 June 10, 1994 Application Graphics Library Imaging Library Color Management Framework Interface Default CMM 3rd Party CMM 3rd Party CMM Profiles 2.5 Color Spaces The InterColor Profile Format supports a variety of both device-dependent and deviceindependent color spaces divided into three basic families: 1) CIEXYZ based, 2) RGB based, and 3) CMY based. The CIE color spaces are defined in CIE publication 14.2 on Colorimetry. A subset of the CIEXYZ based spaces are also defined as exchange spaces. The device dependent spaces below are only representative and other device dependent color spaces may be used without needing to update the profile format specification or the software that uses it. CIEXYZ CIELAB base CIE device-independent color space GRAY monochrome device-dependent color space RGB HLS HSV base additive device-dependent color space CMYK CMY base subtractive device-dependent color space 8
InterColor Profile Format Specification Version 3.0 June 10, 1994 2.6 Profile Connection Spaces A key component of these profiles is a well-defined profile connection space. This space is the interface which provides an unambiguous connection between the input and output profiles as illustrated in the diagram below. The profile connection space is based on the CIE 1931 standard observer. This experimentally derived standard observer provides a very good representation of the human visual system color matching capabilities. Unlike device dependent color spaces, if two colors have the same CIE colorimetry they will match if viewed under the same conditions. Because the imagery is typically produced for a wide variety of viewing environments, it is necessary to go beyond simple application of the CIE system. Monitor Based RGB Image Printer Based CMYK Image Profile Connection Space The profile connection space is defined as the CIE colorimetry which will produce the desired color appearance if rendered on a reference imaging media and viewed in a reference viewing environment. This reference corresponds to an ideal reflection print viewed in an ANSI standard viewing booth. Profile builders should read the Appendix "Connection Color Space for the Standard Profile Format" for further details. The default measurement parameters for the profile connection space and all other color spaces defined in this specification are based on the ANSI CGATS.5-1993 standard, “Graphic technology - Spectral measurement and colorimetric computation for graphic arts images.” Essentially this defines a standard illuminant of D50, the 1931 CIE standard observer, and 0/45 or 45/0 reflectance measurement geometry. The reference viewing condition is ANSI PH2.30-1989, which is a D50 graphic arts viewing environment. One of the first steps in profile building involves measuring the colorimetry of a set of colors from some imaging media or display. If the imaging media or viewing 9
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InterColor Profile Format - CiteSeerX

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