PDF到图像-Magick ++

Question

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!

Answer 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