Question

我想将一些多页的卷宗(.tif或.pdf)转换成个人形象。从指挥线(使用图像模型)来看,我的确:

convert multi_page.pdf file_out.png

我拿到所有页数作为个人形象(文件:out-0.png,文档_out-1.png, ......)

我想处理这一档案转换问题,不幸的是,PIL不能读到.pdf文档,因此,我想使用AdhurMagick。我尝试:

import PythonMagick
im = PythonMagick.Image( multi_page.pdf )
im.write("file_out%d.png")

或

im.write("file_out.png")

But I only get 1 page converted to png. Of course I could load each pages individually and convert them one by one. But there must be a way to do them all at once?

Answer 1

ImageMagick is not memory efficient, so if you try to read a large pdf, like 100 pages or so, the memory requirement will be huge and it might crash or seriously slow down your system. So after all reading all pages at once with PythonMagick is a bad idea, its not safe. So for pdfs, I ended up doing it page by page, but for that I need to get the number of pages first using pyPdf, its reasonably fast:

pdf_im = pyPdf.PdfFileReader(file( multi_page.pdf , "rb"))
npage = pdf_im.getNumPages()
for p in npage:
    im = PythonMagick.Image( multi_page.pdf[ + str(p) + ] )
    im.write( file_out-  + str(p)+  .png )

Answer 2

http://p-s.co.nz/wordpress/pdf-to-png-using-pythonmagick/“rel=”/http://p-s.co.nz/wordpress/pdf-to-png-using-pythonmagick/。

这使用更高的分辨率,使用PyPDF2而不是旧的PyPDF。

import sys
import PyPDF2
import PythonMagick

pdffilename = sys.argv[1] 
pdf_im = PyPDF2.PdfFileReader(file(pdffilename, "rb"))
npage = pdf_im.getNumPages()
print( Converting %d pages.  % npage)
for p in range(npage):
    im = PythonMagick.Image()
    im.density( 300 )
    im.read(pdffilename +  [  + str(p) + ] )
    im.write( file_out-  + str(p)+  .png )

Answer 3

我有同样的问题,与我使用的图像Magick周围的工作一样,也确实如此。

import subprocess
params = [ convert ,  src.pdf ,  out.png ]
subprocess.check_call(params)

友情链接