ImageMagick convert
ImageMagick convert has dozens of options !get version info
$ convert -version
create png / colour separations / histograms
$ convert rose: rose.png $ convert rose: -strip -separate sepa%d.png $ convert rose: -strip -separate histogram:hist%d.png
pdf 2 pdf
convert a 100 page pdf into 100 separate single page pdf files$ convert floorplans.pdf p%03d.pdf
pdf 2 png
convert a 22 page pdf into 22 separate png files$ convert floorplans.pdf b%02d.png
create a calendar
$ cal 2 2010 | convert -size 2000x2000 -background white -fill black -font Liberation-Mono-Regular label:@- feb.png
turn a rectangle into a square
$ convert rectangle.jpg -resize 400x400^ -gravity center -extent 400x400 square.png
REFERRERS
ImageMagick
