I have an PNG file which is quite large and I need to execute some ImageMagick commands via PHP to make it print-ready, this is the general idea:
1. make sure the png is 300dpi
2. resize it to fit 9x5 centimeters
3. apply `cross` on it - for print cutting later
4. save as PDF (again, 300DPI).
I have attached 3 files which shows the `before` state...