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This matrices are not convert to or from the proper YUV colour space both
rather the ones used in videos. srgb_to_yuv was created by converting the
image [sRGB(100%, 0, 0); sRGB(0, 100%, 0); sRGB(0, 0, 100%)] to YUV with
FFmpeg and transposing the matrix. yuv_to_srgb is the inversion of that
matrix, the values in the first column should all be 1 but are not due to
rounding/truncation error.
Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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Some tools are colour space agnostic or even encoding
agnostic, by skipping conversion to CIEXYZ when these
tools are used, the rendering time can be significantly
reduced. The video can also be split horizontally and
vertically, and latted merged back, so it is not necessary
to convert the entire video if only parts of it actually
need it.
Because some tools are less agnostic than other tools,
partial conversion to CIEXYZ is also added.
blind-convert must be updated, and all tools most be test
Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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Signed-off-by: Mattias Andrée <maandree@kth.se>
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