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71 lines
2.1 KiB
Markdown
71 lines
2.1 KiB
Markdown
# ImageMagick
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Components:
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- `compare`: diff tool
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- `convert`: image conversion tool
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## Table of contents <!-- omit in toc -->
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1. [TL;DR](#tldr)
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1. [Further readings](#further-readings)
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1. [Sources](#sources)
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## TL;DR
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```sh
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# Scale images to 50% its original size.
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magick convert -adaptive-resize '50%' 'in.jpg' 'out.jpg'
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# Create GIFs from single images.
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magick *.jpg 'out.gif'
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# Convert N images into individual PDF documents.
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magick *.jpg +adjoin 'page-%d.pdf'
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# Convert N images into pages of a single PDF document.
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magick *.png 'out.pdf'
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# Calculate the percentage of *similarity* between 2 images.
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# Avoid saving the diff.
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magick compare -metric 'NCC' 'in_1.jpg' 'in_2.jpg' NULL:
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# Output only the differences between 2 images.
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magick compare -compose 'src' -fuzz '5%' 'in_1.jpg' 'in_2.jpg' 'diff.jpg'
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```
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## Further readings
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- [Website]
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- [image similarity comparison]
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## Sources
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All the references in the [further readings] section, plus the following:
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- [cheat.sh/convert]
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- [cheat.sh/compare]
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- [Converting Multiple Images into a PDF File]
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- [How to Quickly Resize, Convert & Modify Images from the Linux Terminal]
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- [Diff an image using ImageMagick]
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- [ImageMagick compare without generating diff image]
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<!--
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References
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-->
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<!-- Upstream -->
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[image similarity comparison]: https://imagemagick.org/script/compare.php
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[website]: https://imagemagick.org
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<!-- In-article sections -->
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[further readings]: #further-readings
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<!-- Others -->
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[cheat.sh/compare]: https://cheat.sh/compare
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[cheat.sh/convert]: https://cheat.sh/convert
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[converting multiple images into a pdf file]: https://legacy.imagemagick.org/discourse-server/viewtopic.php?p=144157&sid=e7706233f81874af86ffbbf3e57b1e76#p144157
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[diff an image using imagemagick]: https://stackoverflow.com/questions/5132749/diff-an-image-using-imagemagick
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[how to quickly resize, convert & modify images from the linux terminal]: https://www.howtogeek.com/109369/how-to-quickly-resize-convert-modify-images-from-the-linux-terminal/
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[imagemagick compare without generating diff image]: https://unix.stackexchange.com/questions/612067/imagemagick-compare-without-generating-diff-image
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