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genoism
genoism
Participant
October 11, 2012
Answered

Create PDF without image compression?

  • October 11, 2012
  • 3 replies
  • 48517 views

How do i create a pdf from multiple images without any compression?

Seems like even if i do optimize pdf and select png(edit the settings to do max res and no downscaling), when it saves the pdf, at 100% zoom, it's obviously bigger than my original png and compressed(or maybe it looks blurry because it's being upscaled when i never requested).

In short, if my png is 500x500, i want it to be exactly that size at 100% maginification once the pdf is saved out. I don't want any compression, i don't want any scaling...why is it so hard to do this???

Any help is much appreciated!

    This topic has been closed for replies.
    Correct answer Test Screen Name

    However... the conversion can be lossless.  If you make a PDF file from a SINGLE image (different option) and select the image format in Files of Type you can click Settings and choose the format for compression. Choose ZIP and compression equivalent to PNG is used.

    You also have fine control when printing to PDF.

    It's just the Combine Files function, which is fast and simple, that lacks choices.

    3 replies

    R
    rob-datarati
    Participant
    July 29, 2015

    This answer is for Acrobat DC (Creative Cloud 2015).

    Simply go to the Preferences > Convert to PDF > PNG (or JPEG) and then Edit Settings. Change compression ot JPEG Maximum.

      T
      Test Screen Name
      Legend
      August 2, 2015

      Choosing JPEG maximum should mean there is no visible effect. However JPEG will ALWAYS compress in a lossy way so this is not strictly speaking an answer to "How do i create a pdf ... without any compression?" only "How do I create a PDF... without losing visible quality".

        T
        Test Screen NameCorrect answer
        Legend
        October 11, 2012

        However... the conversion can be lossless.  If you make a PDF file from a SINGLE image (different option) and select the image format in Files of Type you can click Settings and choose the format for compression. Choose ZIP and compression equivalent to PNG is used.

        You also have fine control when printing to PDF.

        It's just the Combine Files function, which is fast and simple, that lacks choices.

        D
        Dave Merchant
        Legend
        October 11, 2012

        PDF files use physical page dimensions (Points, 1/72 inch). They will not scale to a 1:1 pixel size as pixels mean nothing in the physical world.

        The ISO PDF standard defines which types of encoding are permitted for color bitmap image data - JPEG and JPEG2000. Any other type must be converted.

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