pix-bw — combine pix color planes into a bw black and white image
pix-bw
[
[-s squaresize
]
[
[-w width
]
[-n height
]]] [
[-e ntsc|crt
]
[
[ -R r_weight
]
[ -G g_weight
]
[ -B b_weight
] ] ] [in.pix
] >
out.bw
Pix-bw
will combine or select the color planes of a
pix(5)
format
file from its standard input
and produce a black and white
bw(5)
file on its standard output.
By default all three colors are weighted equally.
The
-e
type
flag can be used to specify a standard weighting scheme
The type choices include:
weighting used is based on the NTSC primaries and the D6500 alignment white.
weighting scheme used will be for "typical" CRT phosphor chromaticities and the D6500 white
Individual color plane(s) can be selected via the
-R1.0 -G1.0
and
-B1.0
options
If one or more of these flags is followed by a value,
the value will be treated as a weight
to be applied to that color.
If 0 is supplied by the user for weights, then the weights assigned are 1.0 divided by the number of colors selected.
pix-bw -R0.0 -B0.0 < file.pix > file.bw will equally blend the red and blue color planes.
pix-bw -R0.30 -G0.59 -B0.11 < file.pix > file.bw
has the same effect as the
-ntsc
flag.
[The
-crt
weights are: 0.26, 0.66, 0.08]