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pfscolortransform(1) General Commands Manual pfscolortransform(1) NAME pfscolortransform - Apply color calibration using user provided matrix file. SYNOPSIS pfscolortransform (--xyzrgb matrix-file | --rgbxyz matrix-file) [--trans- pose] DESCRIPTION Use this command to calibrate colours using a calibration matrix supplied in a text file. The command is intended for linearized (not gamma cor- rected) 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 con- tain 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 fol- lows: [RGB]' = M * [XYZ] where ' is matrix transposition, * is matrix multiplication, RGB is a vec- tor 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 fol- lows: [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 memor- ial_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)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO | BUGS
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