Imagemagick: Difference between revisions
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== Reference == |
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* [http://www.imagemagick.org/script/command-line-options.php Imagemagick command-line options] |
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== Howto == |
== Howto == |
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=== Image resize === |
=== Image resize === |
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<source lang=bash> |
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convert front.jpg -resize 500x500 folder.jpg |
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convert front.jpg -filter cubic -resize 500x500 folder.jpg # Set resize filter. 'convert -list-filter' to get a list |
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convert front.jpg -filter cubic -resize 500x500^ folder.jpg # Convert to a size of min 500x500, preserving aspect ratio. |
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</source> |
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=== Get image info === |
=== Get image info === |
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<source lang=bash> |
<source lang=bash> |
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convert -format "%f %w %h" sand.jpg info: |
convert -format "%f %w %h" sand.jpg info: |
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identify -format "%f %w %h" sand.jpg # Same but shorter |
identify -format "%f %w %h" sand.jpg # Same but shorter |
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identify sand.jpg -format "%f %w %h" # WRONG - format string must come before because params are processed sequentially |
identify sand.jpg -format "%f %w %h" # WRONG - format string must come before because params are processed sequentially |
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read -r file width height <<< $(identify -format "%f %w %h" sand.jpg) # Set values in variables |
read -r file width height <<< $(identify -format "%f %w %h" sand.jpg) # Set values in variables |
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</source> |
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=== Crop an image === |
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<source lang=bash> |
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convert IMG_0001.jpg -gravity Center -crop 1000x1000+0+0 +repage IMG_0001-resized.jpg # Crop a 1000x1000 region around center. The '+0+0' are mandatory. |
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</source> |
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=== Convert to JPG === |
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<source lang=bash> |
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convert IMG_0001.png IMG_0001.jpg # Convert with default quality |
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convert IMG_0001.png -quality 96 IMG_0001.jpg # Specify JPG quality |
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</source> |
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=== Blur an image === |
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<source lang=bash> |
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convert IMG_0001.jpg -gaussian-blur 5x2 IMG_0001-blur.jpg # Similar to Gimp gaussian blur 5x5 px |
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convert IMG_0001.jpg -gaussian-blur 5x2 -filter cubic -resize 1000x1000^ -gravity Center -crop 1000x1000+0+0 +repage -quality 96 IMG_0001-resized.jpg |
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</source> |
</source> |
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Revision as of 16:30, 16 December 2015
Reference
Howto
Image resize
convert front.jpg -resize 500x500 folder.jpg
convert front.jpg -filter cubic -resize 500x500 folder.jpg # Set resize filter. 'convert -list-filter' to get a list
convert front.jpg -filter cubic -resize 500x500^ folder.jpg # Convert to a size of min 500x500, preserving aspect ratio.
Get image info
convert -format "%f %w %h" sand.jpg info:
identify -format "%f %w %h" sand.jpg # Same but shorter
identify sand.jpg -format "%f %w %h" # WRONG - format string must come before because params are processed sequentially
read -r file width height <<< $(identify -format "%f %w %h" sand.jpg) # Set values in variables
Crop an image
convert IMG_0001.jpg -gravity Center -crop 1000x1000+0+0 +repage IMG_0001-resized.jpg # Crop a 1000x1000 region around center. The '+0+0' are mandatory.
Convert to JPG
convert IMG_0001.png IMG_0001.jpg # Convert with default quality
convert IMG_0001.png -quality 96 IMG_0001.jpg # Specify JPG quality
Blur an image
convert IMG_0001.jpg -gaussian-blur 5x2 IMG_0001-blur.jpg # Similar to Gimp gaussian blur 5x5 px
convert IMG_0001.jpg -gaussian-blur 5x2 -filter cubic -resize 1000x1000^ -gravity Center -crop 1000x1000+0+0 +repage -quality 96 IMG_0001-resized.jpg