Legacy ImageMagick Discussions Archive

Strange, for me 6.8.2-0 makes 14 png files. And presumably 6.8.-0 was making 1 png file.

It's encouraging that you found that an old versin only converted 1 file.

The problem is that, under a condition that I can't currently reproduce, compressing the pdf with IM failed because it only copied the first page of a multipage pdf. I'm worried that, unless I understand what happened, it could happen again. You should be able to access the files at https://dl ...

fnmw42 -- I made the change in delegates.xml that you suggested, but the behavior didn't change. I'm getting all 14 pages of the document whether the setting is pngalpha or pnmraw.

It looks like I was dealing with a multipage document where 6.8.1 was converting only the first page (hence the small output file size) and 6.8.2 was correctly processing all the pages.

Can you get me the 6.8.1 install file so I can research this further?

Contrary to what I said above, it turns out that I had different versions of IM on my desktop machine and my server. The one on my desktop machine (that gave good results) was ImageMagick-6.8.1-Q16. The one on the server (which gives "bad" results, i.e. a 10X larger output file) is ImageMagick-6.8.2 ...

Well, I installed Ghostscript and Imagemagick myself from copies of the same installation files.

What can I do to track down the problem?

On my development system (Windows 7) I have installed ImageMagick-6.8.1-Q16 and Ghostscript 9.06 (64 bit). The following command "C:\Program Files (x86)\ImageMagick-6.8.2-Q16\convert.exe" -density 300 "c:\temp\Bush.pdf" -threshold 15% -type bilevel "c:\temp\Test00.pdf" converts a 337KB pdf file ...

I am successfully converting PDF files to Monochrome and comprressing the results, provided I call the convert.exe program that I installed on my desktop system with the ImageMagick-6.8.2-10-Q16-x86-dll.exe installer. The command is convert -density 600 in.pdf -threshold 15% -type bilevel -compress ...

OK, this seems to work pretty well convert -density 600 in.pdf -threshold 15% -type bilevel -compress fax out.pdf It compress the input pdf file by a factor of about 8 and changes it to black and white. I just need to test on a larger collection of files to make sure it can handle a variety of ...

Maybe the trick is to get ImageMagick to compress the bitmaps that it embeds in the output PDF file. Can it do this?

Unfortunately I haven't had much luck. convert -density 288 in.pdf -resize 25% out.pdf makes the file twice as large with about 1/3 the resolution, with dithering and grayscale. convert in.pdf -threshold 50% -type bilevel outfile.pdf makes the file 15 times smaller with 1/8 the resolution, bilevel ...

I'm working with a lot of PDF files that were obtained by scanning 1 to 10 page documents consisting mostly of text, and saving as PDF. The ones that were saved in black and white mode are nice and compact, but the ones that were saved in grayscale or color mode are too long. So I'd like to use a ...