2014-03-12 Convert a PDF into an image
Today, I just wanted to convert a PDF into a PNG image. I knew I already did it but I forgot to remember how (I only need it once every six months). I hope you don't mind if I use my own blog to avoid looking again for it. First, it requires ImageMagick. The following script will do the trick:
from PythonMagick import Image
os.environ["MAGICK_HOME"] = r"path_to_ImageMagick"
file = "my.pdf"
to = file.replace(".pdf",".png")
p = PythonMagick.Image()
p.density('300')
p.read(os.path.abspath(file))
p.write(os.path.abspath(to))
# the ImageMacgick command line to do it
# cmd = "convert -density 300 -depth 8 -quality 85 {0} {1}".format(file, to)
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2014-01-29 Convert an equation into a PNG image
I recently faced an issue while converting an equation into an image using the method I developped in this post. I do not know why but the following expression \frac{X_t}{Y_t} did not work. So I had to use miktex and more specifically htlatex through the following command line:
htlatex eq.tex html "" "" "--interaction=nonstopmode"
The last parameter avoids the programm to check the input stream if an error was detected. I wrapped this into a quick and dirty python program you can find below. It will also describe what eq.tex should contain.
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Xavier Dupré
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