Sometimes you want to save a colorscheme, which is usually just a pixel thick, as a swatch or image. You can do this with
colorscheme_to_image(). The second argument is the number of rows. The third argument is the number of times each pixel is repeated in the row. The function returns an image which you can save using FileIO's
using FileIO, ColorSchemeTools, Images, Colors # 20 pixels for each color, 150 rows img = colorscheme_to_image(ColorSchemes.vermeer, 150, 20) save("/tmp/cs_vermeer-150-20.png", img)
image_to_swatch() function (a shortcut) extracts a
n-color scheme from a supplied image and saves it as a swatch in a PNG.
image_to_swatch("/tmp/input.png", 10, "/tmp/output.png")
colorscheme_to_image(cs, nrows=50, tilewidth=5)
Make an image from a ColorScheme by repeating the colors in
nrows rows, repeating each pixel
Returns the image as an array.
using FileIO img = colorscheme_to_image(ColorSchemes.leonardo, 50, 200) save("/tmp/cs_image.png", img) save("/tmp/blackbody.png", colorscheme_to_image(ColorSchemes.blackbody, 10, 100))
image_to_swatch(imagefilepath, samples, destinationpath; nrows=50, tilewidth=5)
Extract a ColorsSheme from the image in
imagefilepath to a swatch image PNG in
destinationpath. This just runs
save() in sequence.
Specify the number of colors. You can also specify the number of rows, and how many times each color is repeated.
image_to_swatch("monalisa.jpg", 10, "/tmp/monalisaswatch.png")
You can save a ColorScheme as a (Julia) text file with the imaginatively-titled
Remember to make the name a Julia-friendly one, because it may eventually become a symbol and a dictionary key if the Julia file is
colorscheme_to_text(ColorSchemes.vermeer, "the_lost_vermeer", # name "/tmp/the_lost_vermeer.jl", # filename category="dutch painters", # category notes="it's not really lost" # notes )
Of course, if you just want the color definitions, you can simply type:
colorscheme_to_text(cscheme::ColorScheme, schemename, filename; category="dutch painters", # category notes="it's not really lost" # notes )
Write a ColorScheme to a Julia text file.
colorscheme_to_text(ColorSchemes.vermeer, "the_lost_vermeer", # name "/tmp/the_lost_vermeer.jl", # file category="dutch painters", # category notes="it's not really lost" # notes )
and read it back in with: