On Fri, 24 Oct 2008, Sebastian Sylvan wrote:
Another useful predefined space which I didn't see is the YCoCg space, which is
used in lots of
compression schemes (like H.264 IIRC).
YCoCg, like HLS and HSV, seems to not really be a colour space because it
isn't well specified. A transformation is given from some unknown RGB
space.
Perhaps I should make a datatype for unknown RGB triple, and create HLS
HSV, and YCoCg transforms from this type. I can have toRGB709 and toSRGB
take and return this unknown RGB triple type.
This would suggest changing sRGB and rgb709 from the type
sRGB :: a -> a -> a -> Colour a
to
sRGB :: RGB a -> Colour a
so the code "sRGB r g b" becomes "sRGB (RGB r g b)". That doesn't seem
very nice.
Also, I could add phantom type annotations to the RGB triple type,
allowing it to be labeled as linear, or nonlinear, or other information.
--
Russell O'Connor <http://r6.ca/>
``All talk about `theft,''' the general counsel of the American Graphophone
Company wrote, ``is the merest claptrap, for there exists no property in
ideas musical, literary or artistic, except as defined by statute.''
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