On Tue, Oct 16, 2012 at 10:00 AM, Jason White <jason@jasonjgw.net> wrote:
How can I most effectively compress scanned page images in PDF files without unduly degrading the visual quality?
I've been trying it with ImageMagick and a file that I want to compress, but so far without achieving much compression.
The ImageMagick identify command, applied to one of the original pages shows: PDF 595x842 595x842+0+0 16-bit Bilevel DirectClass 63.2KB 0.000u 0:00.009
I've been experimenting a little with the -compress, -density and -quality commands of the convert command, but without as much progress as I would prefer. In most cases the output is larger than the input.
I would think that the pdf composition utility would use Flate encryption to store the graphic as a PDF stream object. So, it should be compressed by default. -Matt