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aries1988 : color   30

[ASK] Convert Color/Black to White - ImageMagick
To see what is going on, extract the alpha channel and the background image using

convert donut_black.png -alpha off donut_black_background.png
convert donut_black.png -alpha extract donut_black_alpha.png
explained  png  tool  color 
september 2018 by aries1988
The red and green specialists: why human colour vision is so odd | Aeon Ideas
Most mammals rely on scent rather than sight. Look at a dog’s eyes, for example: they’re usually on the sides of its face, not close together and forward-facing like ours. Having eyes on the side is good for creating a broad field of vision, but b...
comparison  human  eye  color  perception  biology  insect  evolution  research  theory 
february 2018 by aries1988
aschn/gnuplot-colorbrewer: ColorBrewer color schemes for gnuplot
An easy way to use the beautiful color schemes at ColorBrewer in the handy command-line plotting program gnuplot.

All ColorBrewer color schemes that include at least 8 colors are included. Each color scheme provides 8 discrete colors and a continuous color palette. See the examples directory for sample code and output.
visualization  gnuplot  color  palette  tool 
november 2017 by aries1988
Letter of Recommendation: U.S.G.S. Topographical Maps
it is the sort of place that arguably looks better on an orthophoto map. In person, it just seems like rocky wastes and a dead lake. But the map, from above, captivates — a tempestuous burst of almost extraplanetary rust-colored desert strikingly offset by the pale blue lake.
map  usa  design  color  travel  tool 
may 2016 by aries1988
The 954 most common RGB monitor colors
The 954 most common RGB monitor colors, as defined by several hundred thousand participants in the xkcd color name survey.
color  list  rgb 
december 2015 by aries1988
Gnome-terminal 256 color support
export TERM="xterm-256color"
There is no much use of it. But, for example, you can use 256-color vim color-schemes within terminal.
ssh  terminal  color 
august 2015 by aries1988
Attractive plots « Gnuplotting
As you surely have noticed I don’t use the default colors and line styles from Gnuplot, but define them myself. The simple reason is that the default colors are not optimized to be very pleasant, but are simply primary colors. I just stumbled over an blog entry of Brighten Godfrey, which deals with some thoughts on beautiful plots.
gnuplot  color 
august 2015 by aries1988
Haze over Beijing : Image of the Day
The haze “disappears” in the infrared-enhanced image because tiny haze particles do not reflect longer-wavelength infrared light very well, making this type of image useful for distinguishing haze from clouds. The bank of clouds in the upper right corner shows up clearly in both pictures.
image  satellite  beijing  color  pollution 
january 2013 by aries1988
# pointsize is to expand points
set pointsize 2.5
# type 'test' to see the colors and point types available
# lt is for color of the points: -1=black 1=red 2=grn 3=blue 4=purple 5=aqua 6=brn 7=orange 8=light-brn
# pt gives a particular point type: 1=diamond 2=+ 3=square 4=X 5=triangle 6=*
# postscipt: 1=+, 2=X, 3=*, 4=square, 5=filled square, 6=circle,
# 7=filled circle, 8=triangle, 9=filled triangle, etc.

# type 'test' to see the colors and point types available.
# Differs from x11 to postscript
# lt chooses a particular line type: -1=black 1=red 2=grn 3=blue 4=purple 5=aqua 6=brn 7=orange 8=light-brn
# lt must be specified before pt for colored points
# for postscipt -1=normal, 1=grey, 2=dashed, 3=hashed, 4=dot, 5=dot-dash
# lw chooses a line width 1=normal, can use 0.8, 0.3, 1.5, 3, etc.
# ls chooses a line style
plot sin(x)k with linespoints lt 2 pt 4
gnuplot  symbol  color 
july 2012 by aries1988

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