B&W convert use Channel Mixer in background (but not only)
RGB mixing settings are in this method :
https://projects.kde.org/projects/extragear/graphics/digikam/repository/revisions/master/entry/libs/dimg/filters/bw/bwsepiafilter.cpp#L164Gilles Caulier
2011/2/17 davidvj <
[hidden email]>:
>
> DK has a perfectly good converter from color to monochrome, as long as one is
> content to use one of the "film" model formats. There is unfortunately, as
> far as I know, no reference to the RGB ratios that are used for each film
> type and, in any case, my preference would be to be able to choose my own
> RGB ratio depending on the look that I am trying to achieve.
>
> The "Channel Mixer" appears to have all of the capabilities that are needed
> to exactly do this job including a Monochrome switch to cut saturation ...
> but it doesn't appear to work that way. As soon as I start to mess with the
> values in Red for instance my image turns black despite boosting other
> values. Maybe it just is not designed for such a use.
>
> I would appreciate comments from others who are outputting Monochrome
> imagery.
>
> David
> --
> View this message in context:
http://digikam.1695700.n4.nabble.com/Converting-to-Monochrome-tp3310027p3310027.html> Sent from the digikam-users mailing list archive at Nabble.com.
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