icc rgb profile editing

utility/function to locally edit an icc rgb profile (say adobe)?

Answer 1

[John D'Errico]

You can use iccread and iccwrite.

help iccread

 iccread - Read ICC profile
    This MATLAB function reads the International Color Consortium (ICC)
    color profile data from the file specified by the input filename.

    Syntax
      profile = iccread(filename)

    Input Arguments
      filename - Name of the file containing ICC profile
        character vector | string scalar

    Output Arguments
      profile - ICC profile data
        structure array

    Examples
      openExample('images/ReadICCProfileForTypicalPCComputerMonitorExample')

    See also applycform, iccfind, iccroot, iccwrite, isicc, makecform

    Introduced in Image Processing Toolbox before R2006a
    Documentation for iccread
       doc iccread

help iccwrite

 iccwrite - Write ICC color profile data
    This MATLAB function writes an International Color Consortium (ICC)
    profile data in structure inProfile to the file specified by filename.

    Syntax
      outProfile = iccwrite(inProfile,filename)

    Input Arguments
      inProfile - Input ICC profile data
        structure array
      filename - Name of the file to write ICC profile data
        character vector | string scalar

    Output Arguments
      outProfile - Output ICC profile data
        structure array

    Examples
      openExample('images/WriteICCProfileDataToAFileExample')

    See also applycform, iccread, isicc, makecform

    Introduced in Image Processing Toolbox before R2006a
    Documentation for iccwrite
       doc iccwrite

Having used iccread, you can modify whatever you wish, then write it back out. These tools live in the image processing toolbox, so you would need that.

If you don't have the IPTB (why in the name of god why not, if you are using MATLAB to work with this stuff?) then you would need to use other tools, or write something yourself. An ICC profile is just a file, with carefully published specifications somewhere. (Probably available from the ICC.) But just use ICCREAD and ICCWRITE.