1pfscolortransform(1) General Commands Manual pfscolortransform(1)
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6 pfscolortransform - Apply color calibration using user provided matrix
7 file.
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10 pfscolortransform (--xyzrgb matrix-file | --rgbxyz matrix-file)
11 [--transpose]
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14 Use this command to calibrate colours using a calibration matrix sup‐
15 plied in a text file. The command is intended for linearized (not
16 gamma corrected) color spaces. The matrix should be 3x3 and it should
17 transform from CIE XYZ to ITU rec. 709 RGB (sRGB primaries but linear,
18 no gamma) or from the same RGB to CIE XYZ (see options below). The text
19 file should contain three rows with numbers separated by a comma, for
20 example:
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22 0.0292,0.0126,0.0009
23 0.0052,0.0340,-0.0049
24 0.0055,-0.0059,0.0409
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26 If the --xyzrgb is supplied, the pixel values are color-transformed as
27 follows:
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29 [RGB]' = M * [XYZ]
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31 where ' is matrix transposition, * is matrix multiplication, RGB is a
32 vector of RGB values and XYZ is the vector of CIE XYZ trichromatic val‐
33 ues. If the --rgbxyz is supplied, the pixel values are color-trans‐
34 formed as follows:
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36 [XYZ]' = M * [RGB]
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39 --xyzrgb matrix-file, -x matrix-file
40 User provided matrix is a conversion matrix to convert from XYZ
41 to RGB color space.
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43 --rgbxyz matrix-file, -r matrix-file
44 User provided matrix is a conversion matrix to convert from RGB
45 to XYZ color space.
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47 --transpose, -t
48 Take transpose of provided matrix file.
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51 pfsin memorial.hdr | pfscolortransform -x matrix.txt | pfsout memo‐
52 rial_gc.ppm
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54 Color calibrate memorial image with matrix in matrix.txt file
55 and save to memorial_gc.ppm.
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58 pfsin(1) pfsout(1) pfsdisplayfunction(1)
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61 Please report bugs and comments to the pfstools discussion group
62 (http://groups.google.com/group/pfstools).
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66 pfscolortransform(1)