To perform the conversion, each RGB triplet is first converted to the Profile connection space (PCS) using the RGB profile.

The first step is to obtain the two ICC profiles concerned. To see how this works in practice, suppose we have a particular RGB and CMYK color space, and want to convert from this RGB to that CMYK.

ICC has also published a preliminary specification for iccMAX (ICC.2) or ICCv5, a next-generation color management architecture with significantly expanded functionality and a choice of colorimetric, spectral or material connection space. The current version of the format specification (ICC.1) is 4.4. Two main generations are used: the legacy ICCv2 and the December 2001 ICCv4. This means there is room for variation between different applications and systems that work with ICC profiles. The ICC defines the format precisely but does not define algorithms or processing details. Some manufacturers provide profiles for their products, and there are several products that allow an end-user to generate their own color profiles, typically through the use of a tristimulus colorimeter or a spectrophotometer (sometimes called a spectrocolorimeter). Mappings may be specified using tables, to which interpolation is applied, or through a series of parameters for transformations.Įvery device that captures or displays color can be profiled. This PCS is either CIELAB (L*a*b*) or CIEXYZ. Profiles describe the color attributes of a particular device or viewing requirement by defining a mapping between the device source or target color space and a profile connection space (PCS). In color management, an ICC profile is a set of data that characterizes a color input or output device, or a color space, according to standards promulgated by the International Color Consortium (ICC).

How to install icc profile mac 2019