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https://github.com/chubin/cheat.sheets
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38 lines
1.3 KiB
Plaintext
38 lines
1.3 KiB
Plaintext
# Resize an image to a fixed width and proportional height:
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convert original-image.jpg -resize 100x converted-image.jpg
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# Resize an image to a fixed height and proportional width:
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convert original-image.jpg -resize x100 converted-image.jpg
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# Resize an image to a fixed width and height:
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convert original-image.jpg -resize 100x100 converted-image.jpg
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# Resize an image and simultaneously change its file type:
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convert original-image.jpg -resize 100x converted-image.png
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# Resize all of the images within a directory, using a for loop:
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for file in original/image/path/*; do
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convert "$file" -resize 150 converted/image/path/"$file"
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done
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# Make text annotation (text = Flower)
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convert flower.jpg -font courier -fill white -pointsize 20 -annotate +50+50 'Flower' flower_annotate1.jpg
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# Crop an image
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convert flower.jpg -crop 128×128+50+50 flower_crop.jpg
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# Rotate an image
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convert flower.jpg -rotate 45 flower_rotate45.jpg
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# Add a border
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convert -border 1x1 -bordercolor "#FFFFFF" image.png new-image.png
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# Convert PNG to JPEG (with 70% quality)
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convert -quality 70 image.png new_image.jpg
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# Apply vignette and grayscale effects to all JPGs in the CWD, using a for loop.
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for FILE in *.jpg; { convert -background black -colorspace gray -vignette 200x100 "$FILE" "$FILE"; }
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# Convert multiple images to PDF
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convert image1.png image2.jpg image3.bmp output.pdf
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