Re: Shrink Images and PDFs

I see that an image is resized to maximum of 1000 px square (input images are supposedly of larger size). For your PDF files, what does gs do or not do which reduce the PDF file size? Is it mainly ebook option?

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Re^2: Shrink Images and PDFs by haukex (Bishop) on May 02, 2020 at 11:52 UTC
For your PDF files, what does `gs` do or not do which reduce the PDF file size? Is it mainly `ebook` option? Yes, I've found the `ebook` option a convenient way to downsample the resolution of the images embedded in a PDF to 150 DPI. So this script will have a significant effect on PDF files that are large due to them containing high-resolution images (like scans), and less of an effect on PDFs that are already smaller than ~1MB.	[reply] [d/l] [select]
Re^3: Shrink Images and PDFs by parv (Vicar) on May 02, 2020 at 13:02 UTC
Ah, ok. Thanks for the explanation, mainly because I had not thought of embedded images. I was thinking that `ebook` option might be restructuring the PDF, using common fonts and removing embedded fonts, etc.	[reply] [d/l]
Re^4: Shrink Images and PDFs by haukex (Bishop) on May 02, 2020 at 14:47 UTC
I was thinking that `ebook` option might be restructuring the PDF, using common fonts and removing embedded fonts, etc. One of the settings of the `ebook` profile is `EmbedAllFonts=true`, so I might consider disabling that, but other than that I haven't noticed the `gs` command modifying anything about the PDFs other than the images.	[reply] [d/l] [select]


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