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[Foxit PhantomPDF Business] Signature has wrong size (ignores DPI)

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  • Bug [Foxit PhantomPDF Business] Signature has wrong size (ignores DPI)

    I sign PDF documents on a regular base using picture files (scans). Unfortunately, it seems that PhantomPDF Business edition ignores the scanning resolution (DPI) contained in scanned files. As a result, signatures have the wrong size. Size must then be corrected manually but there is no way to enter the exact width/height when applying signatures.

    To reproduce the problem, first create a picture that will be used as a test signature, using any image processing app (such as GIMP) as follows:
    1. Create a canvas of size 400 x 400 pixels and 400 DPI.
    2. Fill with any non-white color.
    3. Save as square.png (PNG format).

    Then, in Foxit PhantomPDF Business Edition:
    1. Home > PDF Sign
    2. Click on 'Create signature'.
    3. In the dialog box "Create Signature":
      1. Uncheck "Convert signature to black & white"
      2. Create by 'Import File' and select the picture file square.png created above
      3. Click 'Save'
    4. View > Check "Rulers" (in the Page Display group)
    5. Home > PDF Sign, and select the newly added square.png signature
    6. The square signature is added to the page.


    EXPECTED: The expected size of the signature is exactly 1 inch by 1 inch (2.54 cm x 2.54 cm)

    ACTUAL: the square signature has a wrong size of approximately 1.375 inch x 1.375 inch (3.5 cm x 3.5 cm)

    FEATURE REQUEST: please use the DPI resolution embedded by scanning or image editing software to display signatures at the correct size.


    Note: adding the same square.png as an image prints the square with the correct size of 1 inch x 1 inch. To test this:
    1. Edit > Add images > Image from file
    2. Select the square.png created above and hit 'Open'
    3. The square is added to the page and has a size of 1 inch x 1 inch as expected


    Test environment:
    • Foxit PhantomPDF Business V9.4.1.16828
    • Windows 10 Pro 1809
    • GIMP V2.10.10

  • #2

    foxitkap ,I apologize for the trouble.We have provided option to let user choose whether to reserve the signature original size when create PDF sign in V9.5 of Foxit Reader/Foxit PhantomPDF.
    Foxit PhantomPDF/Foxit Reader 9.5 will be expected to be released within this week if everything goes well. So please help to give the V9.5 a try to see if it works on your part after it is released.
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