问题
I want to convert a pdf to a series of images using magick++. I currently have this code:
Image * img = new Image();
img->read(Tests+"finance-02-2007-multiples.pdf[0]");
Tests is a variable which contains the folder path. The "[0]" means that I want the first page to read in an image.
However, this code snippet does not work. The exception "Magick::ErrorDelegate" appears. I know that ImageMagick uses GhostScript to render the page. Can it be that i need to do something to enalbe GhostScript in ImageMagick first?
Or has someone an ide how to get the code to work?
Thanks so much!
回答1:
That error is telling you that cannot find GhostScript on your computer.
In order to read a PDF using Magick, you must have GhostScript installed. Magick++ has a (limited) internal support only for writing a pdf. It actually embeds an image in pdf. The reason is that GhostScript is licenced as GPL and cannot be included in Magick, but fortunately can be used if installed by user :).
Magick checks for a GhostScript via registry. Make sure you have installed a verion of GhostScript and that installation has created one of the keys below in HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE.
"SOFTWARE\GPL Ghostscript",
"SOFTWARE\GNU Ghostscript",
"SOFTWARE\AFPL Ghostscript",
"SOFTWARE\Aladdin Ghostscript"
Hope it helps
来源：https://stackoverflow.com/questions/4885194/pdf-to-image-magick