Search found 5 matches

by dtr
2018-06-21T19:02:17-07:00
Forum: Bugs
Topic: “JPEG” algo treats JPEGs differently when combining to a PDF
Replies: 10
Views: 9164

Re: “JPEG” algo treats JPEGs differently when combining to a PDF

fmw42 wrote: 2018-06-21T14:39:22-07:00 I would suggest you search Google for jpg to pdf converters. See for example, https://en.softonic.com/downloads/jpg-to-pdf-converter
Sending people to hell openly is better, for it saves time.
by dtr
2018-06-21T18:49:36-07:00
Forum: Bugs
Topic: “JPEG” algo treats JPEGs differently when combining to a PDF
Replies: 10
Views: 9164

Re: “JPEG” algo treats JPEGs differently when combining to a PDF

It doesn't take a shortcut from input to output, but always decompresses then re-compresses, and this is often lossy: it changes pixels. Then it’s definitely strange, that the original image, that was compressed with quality 60, loses quality less, than an edited image, which was saved with quality...
by dtr
2018-06-21T13:03:33-07:00
Forum: Bugs
Topic: “JPEG” algo treats JPEGs differently when combining to a PDF
Replies: 10
Views: 9164

Re: “JPEG” algo treats JPEGs differently when combining to a PDF

I think the question is: "I have JPEG files. I want to put them inside PDF wrappers, guaranteeing the JPEG doesn't change. Is that possible with ImageMagick?" I’m sorry, but that’s wrong. I wanted to find the best way to make a PDF from a bunch of JPEGs, so that the quality was preserved ...
by dtr
2018-06-21T12:47:40-07:00
Forum: Bugs
Topic: “JPEG” algo treats JPEGs differently when combining to a PDF
Replies: 10
Views: 9164

Re: “JPEG” algo treats JPEGs differently when combining to a PDF

After reading all that, I am not sure what the ImageMagick bug actually is. Can you describe it in a short sentence? https://i.imgur.com/YOPXqFy.png When a tool doesn’t produce expected result, it is either a bug, or it lacks documentation. I’ve taken five pages from that book, with pictures and wi...
by dtr
2018-06-21T08:15:11-07:00
Forum: Bugs
Topic: “JPEG” algo treats JPEGs differently when combining to a PDF
Replies: 10
Views: 9164

“JPEG” algo treats JPEGs differently when combining to a PDF

I wanted to find the best way to make a PDF from a bunch of JPEGs, so that the quality was preserved at maximum. The JPEGs are scans of a book, JPEGs are only 1200 px height and have quality 60, so ideally I’d want them to be taken to PDF untouched. Since there may be some metadata manipulation in t...