Hi,
I cannot reproduce your result:
R> as(as(RGB(0, 0, 0), "HLS"), "RGB")
R G B
[1,] 0 0 0
You probably should provide the output of sessionInfo().
Regards,
Pascal
On Thu, Mar 13, 2014 at 7:41 AM, Michael Gauland <mikely...@amuri.net> wrote:
> I just started using the colorspace package, and converting between RGB and
> HLS is not working as I expect. In particular, converting RGB(0,0,0) to HLS
> then back to RGB seems broken:
>
> #> as(as(RGB(0, 0, 0), "HLS"), "RGB")
> R G B
> [1,] 1 1 0
>
> That is, converting black to HLS then back again produces yellow!
>
> Other values I've tried work as expected (i.e., I get the same RGB value out
> as I put in).
>
> Is this a bug in the code, or in my understanding of colour conversions?
>
> Kind Regards,
> Mike
>
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--
Pascal Oettli
Project Scientist
JAMSTEC
Yokohama, Japan
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