NAME

       pfscolortransform - Apply color calibration using user provided matrix file.

SYNOPSIS

       pfscolortransform (--xyzrgb matrix-file | --rgbxyz matrix-file) [--transpose]

DESCRIPTION

       Use this command to calibrate colours using a calibration matrix supplied in a text file.  The command is
       intended for linearized (not gamma corrected) color spaces.  The matrix  should  be  3x3  and  it  should
       transform  from CIE XYZ to ITU rec. 709 RGB (sRGB primaries but linear, no gamma) or from the same RGB to
       CIE XYZ (see options below). The text file should contain three rows with numbers separated by  a  comma,
       for example:

              0.0292,0.0126,0.0009
              0.0052,0.0340,-0.0049
              0.0055,-0.0059,0.0409

       If the --xyzrgb is supplied, the pixel values are color-transformed as follows:

              [RGB]' = M * [XYZ]

       where ' is matrix transposition, * is matrix multiplication, RGB is a vector of RGB values and XYZ is the
       vector of CIE XYZ trichromatic values.  If  the  --rgbxyz  is  supplied,  the  pixel  values  are  color-
       transformed as follows:

              [XYZ]' = M * [RGB]

OPTIONS

       --xyzrgb matrix-file, -x matrix-file
              User provided matrix is a conversion matrix to convert from XYZ to RGB color space.

       --rgbxyz matrix-file, -r matrix-file
              User provided matrix is a conversion matrix to convert from RGB to XYZ color space.

       --transpose, -t
              Take transpose of provided matrix file.

EXAMPLES

       pfsin memorial.hdr | pfscolortransform -x matrix.txt | pfsout memorial_gc.ppm

              Color calibrate memorial image with matrix in matrix.txt file and save to memorial_gc.ppm.

SEE ALSO

       pfsin(1) pfsout(1) pfsdisplayfunction(1)

BUGS

       Please      report      bugs      and      comments      to     the     pfstools     discussion     group
       (http://groups.google.com/group/pfstools).

                                                                                            pfscolortransform(1)