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Now, it's all under the notebook umbrella. Seems to be appropriate as it is just my notes after all. I also updated some notes from there. I didn't keep track of what it is this time. Something about more learning notes extracted from my "Learning how to learn" course notes and then some. Lack of time and hurriness just makes it difficult to track but it should be under version control already.
64 lines
1.3 KiB
Org Mode
64 lines
1.3 KiB
Org Mode
:PROPERTIES:
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:ID: a7dd09f3-5bf7-4628-aaed-a5ae64c76f41
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:END:
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#+title: Command line: ImageMagick
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#+date: "2021-05-09 19:55:50 +08:00"
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#+date_modified: "2021-07-20 23:31:03 +08:00"
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#+language: en
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The swiss army knife for picture manipulation in the command line.
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For future reference, this mainly use v7 which has Git-style interface (which is way better, IMO).
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* Synopsis
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#+begin_src shell
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magick [subcommand [subcommand_options...]]
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#+end_src
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* Subcommands
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- =convert= - resize images, convert between formats, apply filter effects
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- =identify= - print information on the image
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- =mogrify= - similar to =convert= except modifies the original file
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* Examples
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A comprehensive tool calls for a comprehensive introduction.
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** Resize an image by half
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#+begin_src shell
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magick resize $INPUT -resize 50% $OUTPUT
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#+end_src
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You can find out various geometry options from the [[https://imagemagick.org/script/command-line-processing.php#geometry][documentation]].
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** Print the information
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#+begin_src shell
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magick identify $INPUT
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#+end_src
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** Use ImageMagick as a color picker
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You can use any tool that can pipe an image to other tools.
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#+begin_src shell
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maim --select --shader crosshair --tolerance 0 --hidecursor | magick convert - -resize 1x1\! -format '%[hex:p{0,0}]' info:-
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#+end_src
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