Note, as of ImageMagick 7.0.10-53, the commas are no longer necessary and the slash can proceed the alpha value, e.g. The format of an sRGB value in the functional notation is 'rgb( r, g, b)', where r, g, and b are either three integer or float values in the range 0-255 or three integer or float percentage values in the range 0-100%. ImageMagick does not need to load the expansive color table to interpret a hexadecimal color, e.g., #000000, but it does if black is used instead. Use the hexadecimal notation whenever performance is an issue. This ensures that white (#ffffff) can be specified with the short notation (#fff) and removes any dependencies on the color depth of the image. The three-digit sRGB notation (#rgb) is converted into six-digit form (#rrggbb) by replicating digits, not by adding zeros. The format of an sRGB value in hexadecimal notation is a '#' immediately followed by either three, six, or twelve hexadecimal characters. Rgb(255, 0, 0) an integer in the range 0-255 for each component These examples all specify the same red sRGB color: The sRGB, CMYK, HSL and HSB color models are used in numerical color specifications. The list of recognized color names (for example, aqua, black, blue, fuchsia, gray, green, lime, maroon, navy, olive, purple, red, silver, teal, white, yellow, and others) is shown in a table further below. Magick -bordercolor 'rgb(0,100%,0)' -border 10 image.jpg image.png Magick -bordercolor 'rgb(0,255,0)' -border 10 image.jpg image.png Magick -bordercolor '#00ff00' -border 10 image.jpg image.png Magick -bordercolor '#0f0' -border 10 image.jpg image.png Magick -bordercolor lime -border 10 image.jpg image.png Example UsageĮach of the following commands produces the same lime border around the image. Use the Color Converter to supply any valid ImageMagick color specification as described below to see a color swatch of that color and to convert to all the other color models. These topics are briefly described in the sections below. HSL, HSLA, HSB, HSBA, CMYK, or CMYKA color models may also be specified. The color can then be given as a color name (there is a limited but large set of these see below) or it can be given as a set of numbers (in decimal or hexadecimal), each corresponding to a channel in an RGB or RGBA color model. Image_file = image_nvert( '1', dither=Image.A number of ImageMagick options and methods take a color as an argument. open( "cat-tied-icon.png") # open color image Image_file = image_nvert( '1') # convert image to black and whiteīlack and White using Pillow, without dithering from PIL import Image
open( "cat-tied-icon.png") # open colour image It will look like it has shades of grey but your brain is tricking you! (Black and white near each other look like grey) from PIL import Image Using pillow you can convert it directly to black and white. from PIL import Imageīw = gray.point( lambda x: 0 if x= 128] = 255 # White # Now we put it back in Pillow/PIL landīlack and White using Pillow, with dithering Pillow (or PIL) can help you work with images effectively.
#255 255 255 is white or black install
Install pillow if you haven't already: $ pip install pillow Convert to grayscale and then scale to white or black (whichever is closest).
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