c# - Convert PDF To Image - library or command line - free -
how can convert each pages of pdf's file in c#, using free command line or free library?
thank you
example commandlines ghostscript converting multipage pdf images (1 image per page):
gswin32c ^ -o gray_page_%03d.png ^ -sdevice=pnggray ^ input.pdf .
gswin32c ^ -o page_%03d.png ^ -sdevice=png256 ^ input.pdf .
gswin32c ^ -o page_with_alphachannel_%03d.png ^ -sdevice=pngalpha ^ input.pdf .
gswin32c ^ -o cmyk_page_%03d.jpeg ^ -sdevice=jpegcmyk ^ -djpegq=80 ^ input.pdf .
gswin32c ^ -o rgb_page_%03d.jpeg ^ -sdevice=jpeg ^ -djpegq=100 ^ input.pdf .
gswin32c ^ -o tiffg4_page_%03d.tiff ^ -sdevice=tiffg4 ^ input.pdf .
gswin32c ^ -o tiffg32nc_page_%03d.tiff ^ -sdevice=tiff32nc ^ -scompression=lzw ^ input.pdf ...and many more possible....
if need control resolutions , page sizes (and not rely on ghostscript's defaults) add these parameters:
-r600x600 gives horizontal , vertical resolution of 600 dpi.
-g5950x8420 applies widths of 5950 "devicepoints" , height of 8420 "devicepoints". depending on resolution used @ same time, devicepoints end on paper in different sizes. in case of resolution -r720x720 above example of -g5950x8420 become same media size of din a4 iso (which in postscript points 595 842.
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