Dr. Philip A. Tresadern

Hints: ImageMagick

Cropping Images

When you crop an image, the output depends on where the co-ordinate frame of the image is defined. If an image has been cropped previously, it probably still has the old co-ordinate frame and recropping probably won't give the output you want. It's easiest, therefore, if you reset the coordinate frame with '+repage' before cropping:

Converting Vectors to Bitmaps

When converting a vector graphic to bitmap, -density is the option to control the resolution (in dots per inch). NB: it needs to come before the input file, not after.