Imagemagick notes (convert)

From SnOwy - Ed's Wiki Notebook

Contents 1 Format 2 Resize 3 Compile an animated gif 4 Reduce quality 5 ImageMagick with make utility for batch conversion 6 Convert PNG to Greyscale

Format

convert a.in.png a.in.eps

Resize

convert a.in.png -resize 60x60 a.out.png

Compile an animated gif

convert -delay 10 -loop 0 *.jpg seizurebear.gif

Reduce quality

convert emperor.png -resize 260 -quality 0 emperorres.png

• http://www.imagemagick.org/script/command-line-options.php#quality

ImageMagick with make utility for batch conversion

Using Make Utility (makefile)...

• Make_Utiltiy_Hints#Andre's_help

Convert PNG to Greyscale

convert colourimages/oreo1.png -colorspace Gray singleimages/oreo1.png

• this is perceptual.

convert colourimages/oreo1.png -colorspace Gray -alpha off greyimages/oreo1.png

• removes the alpha channel too.