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Tim
Asked: 2012-07-24 14:54:43 +0800 CST

How can I edit a picture into an existing PDF file?

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I have a scanned PDF file which is an application form, and a picture which is the scanned version of my signature (for example, this one) and can be in any image format such as EPS or PNG. I would like to put the signature picture on the blank space right to "APPLICANT:" on the second page of the application form. I wonder how to do that?

I have tried the following methods, but none succeeded:

  1. The first way is using gimp. I first import the application form into gimp, and then paste the signature picture on the space right to "APPLICANT:" on the second page of the application form.

    The problems are that:

    • It seems that I can only import one page of the application form into gimp, not all of the two pages.

    • Also when I save the modification, the closest format to PDF I can save to is PS, and the resolution has been downgraded and the storage size of the saved file is 10 times bigger than the original application form and the signature picture.

  2. The second way is using Libreoffice Draw. I have installed the libreoffice-pdfimport package. But after I import the application form into Libreoffice Draw,

    • all the scanned content is not imported, and

    • the layout is different from the layout of the original application form.

So what other ways can I try? I would prefer some way that can lay the signature picture directly on the application form PDF file,

  • without having to convert between formats,
  • without having to create much bigger files while keeping the original resolution,
  • without having to split and combine pages of a multi-page pdf file,
  • without having to rasterize other parts of the PDF file, i.e. without losing the text that I added later to the application form PDF file by having to convert the whole PDF into images.
pdf

13 Answers

  1. My recommendation is Xournal and its actively developed fork, Xournal++. Here are the instructions.

    Install (for Xournal):

    sudo apt-get install xournal

    For Xournal++ you can use either the stable PPA,

    sudo add-apt-repository ppa:apandada1/xournalpp-stable
sudo apt update
sudo apt install xournalpp

    or the flatpak,

    flatpak install flathub com.github.xournalpp.xournalpp

    Run xournal or xournal++, click File>Annotate PDF, choose your PDF file.

    Now, go to where you need to add your signature and click Tools>Image (or the "Image" toolbar icon), then click where you want to add the image. An image selection dialog appears, select your image.

    Xournal's insert image is a great addition but not polished. As soon as you add the image make sure to resize it and move it to where you want. Resizing the image retains the proportions if you grab the image by the corner where a little arrow appears diagonal to the image rectangle. Once you are done, it is in its own layer, which you cannot change. If you don't like how it ends up delete that layer and start again.

    One handy thing is that you can use ctrl-c as soon as you resize it and then ctrl-v the next time you need to insert your image. Assuming you want the same size image this will save you some time.

    When you are done choose File->Export to PDF to get it back into the PDF format I assume you'll want for sending your signed doc.

    Note: A downside to Xournal is the finished document looks like the fonts are converted to an image. Fonts are no longer as crisp. Still it looks better than if you printed and rescanned and is much faster. [Note: in my most recent experience it seems this problem has been solved. Maybe I just got lucky with the particular fonts used. Please leave a comment abt your experience and I'll update accordingly.] This issue seems to be fixed in Xournal++ version 1.0.20. Another caveat is that if your original PDF contains forms, these will be lost when saving it in Xournal. Keep a backup copy of the original. If you have forms in the PDF, fill them in first using a different app (Xournal++ doesn't support it), save it and then insert the image with Xournal++.

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  2. LibreOffice Draw will let you modify PDF's.

    In Ubuntu you might need to install LibreOffice Extension for Importing PDF Files which you can do by running sudo apt-get install libreoffice-pdfimport

    I have used it for inserting scans of my signatures.

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  3. You could use PDF Buddy, an online PDF editor that makes adding signatures ridiculously easy: you can just draw them or add them as image files.

    enter image description here

    (Disclosure: I'm a co-founder of PDF Buddy)

    • 11

  4. A very simple way is to use Scribus:

    1. Open the PDF file with Scribus (directly from the file manager for example)
    2. Add an image box at the correct place
    3. Load the picture into the image box
    4. Export as PDF

    The quality of the output is very good, the image resolution can be limited in the export and the positioning and scaling of the picture is quite simple.

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  5. I have found a way to do this, but it involves converting your signature image to pdf and then merging that with the target application form and then outputting a new document; the signature is added at the end of the document. It is quite simple to do and may be the easiest way to do it. Imagemagick is the program to install (if necessary) and use its convert function in this manner: convert original.pdf signature.pdf final.pdf.

    Screenshot

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  6. You can use pdftk

    sudo apt-get install pdftk

    It's just one command:

    pdftk A=Orig.pdf B=MyPage.pdf cat A1-4 B1 A6-11 output Combined.pdf

    Or read an article about applying a signature to a pad here: http://zyliu2005.blogspot.co.uk/2009/08/linux-how-to-insert-img-to-pdf-files.html

    It also allows you to

    • Merge PDF Documents or Collate PDF Page Scans
    • Split PDF Pages into a New Document
    • Rotate PDF Documents or Pages
    • Decrypt Input as Necessary (Password Required)
    • Encrypt Output as Desired
    • Fill PDF Forms with X/FDF Data and/or Flatten Forms
    • Generate FDF Data Stencils from PDF Forms
    • Apply a Background Watermark or a Foreground Stamp
    • Report PDF Metrics, Bookmarks and Metadata
    • Add/Update PDF Bookmarks or Metadata
    • Attach Files to PDF Pages or the PDF Document
    • Unpack PDF Attachments
    • Burst a PDF Document into Single Pages
    • Uncompress and Re-Compress Page Streams
    • Repair Corrupted PDF (Where Possible)

    For an article explaining all the options, see: http://www.linux.com/learn/tutorials/442414-manipulating-pdfs-with-the-pdf-toolkit

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  7. Try Xournal, you can just 'sign' with the mouse then re-export as a PDF. It's in the Software Center.

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  8. I think you were on the right track with GIMP. Why not capitalize on what you have done in GIMP and re-merge the PDF using something like PDF shuffler (has the capability to import postscript PS files).

    See this previous question how to

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  9. You can try: uPdf

    You can add blank pages, or pages from other documents or insert images, or text.

    sudo add-apt-repository ppa:atareao/updf
sudo apt-get update
sudo apt-get install updf
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  10. Xournal++ ! A more active version of Xournal.

    • Open the PDF in Xournal++
    • click on the image icon
    • click where you want to put the image
    • in the window that opens, find your image and select it
    • resize/move it if needed
    • then File > Export as PDF
    • and voilà, no need to save it in the xournal file format.
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