[argyllcms] Re: some questions about target command
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 26 Apr 2017 13:36:59 +1000
243750496 wrote:
Hi,
The *-D* parameter modifies the colorspace set by -d by allowing individual
colorants to
be added or subtracted from the colorspace.
*(1) how to make -D Working in add mode and Working in Subtracted mode?do
the command is
same?*
The -D inverts the presence of a colorant:
targen -d4 -D4
gives CMY
targen -d4 -D5
gives CMYKO
*(2)what do -e do ? I see no difference between setting 2 and 4.*
targen -v -d3 -f0 -m3 test
gives 33 patches with 4 of them being white.
targen -v -d3 -f0 -m3 -e2 test
gives 31 patches with 2 of them being white.
targen -v -d3 -f0 -m3 -e6 test
gives 35 patches with 6 of them being white.
*（4）what do -s -g -m -b do? and what's the difference between those
parameters?
It is explained in the text you included. If that isn't clear, you should
point out specifically what isn't clear. In any case, I'd recommend
experimenting
with the parameters. i.e. try:
targen -v -O -U -d3 -f0 -e0 -B0 -s4 test
targen -v -O -U -d3 -f0 -e0 -B0 -g4 test
targen -v -O -U -d3 -f0 -e0 -B0 -m4 test
targen -v -O -U -d3 -f0 -e0 -B0 -b3 test
and look at the resulting .ti1 files.
And
what's the math algorithm behind the step *
*And the parameter: *0.0 0.25 0.5 0.75 and 1.0,
0.0 0.0625 0.25 0.5625 and 1.0.
The source code is there for such detail, but by default
the steps are an even division of the device space. So 4
steps out of 0% to 100% will be 0%, 33.3% 66.6% 100% etc.
(The spacing is altered by the the -p parameter though.)
The *-f* parameter sets the number of full spread test patches.
*（5）what is the parameters function and what will they do to the OFPS
algorithm?*
As explained, the -f parameter sets the number of full spread patches. It does
nothing
to the (default) OFPS algorithm, apart from setting the number of patches to
generate.
The -t, -r, -R, -q, -Q, -i, -I flags switch from OFPS to the specified alternate
algorithm.
Hope this helps,
Graeme Gill.
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