TOOL » IMAGE_MANIPULATOR » IMAGEMAGICK » FORMATS

Jpg

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Examples ​

Reduce image size ​

shell
convert bigimage.png -strip -resize x180 -quality 85 -interlace plane -sampling-factor 4:2:0 smallimage.jpg

Colored background into white ​

Good for creating photos used in documents.

shell
convert input.jpg -channel RGB -fuzz 13% -fill white -floodfill +0+0 '#c2b0a2' output.png

White background into transparent ​

With start point:

shell
convert input.jpg -alpha set -channel alpha -fuzz 50% -fill none -floodfill +0+0 white -trim output.png

Color match:

shell
convert input.jpg -alpha set -channel alpha -fuzz 50% -fill none -opaque white -trim output.png

Invert RGB colors ​

shell
convert input.jpg -channel RGB -negate output.jpg

Grayscale ​

shell
convert input.jpg -colorspace Gray output.jpg