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# convert
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# Image converter and manipulator
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# 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, which in this example is '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 around an image.
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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 & 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 and combine multiple images to a single PDF.
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convert image1.png image2.jpg image3.bmp output.pdf
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