[Poppler-bugs] [Bug 82995] New: pdfimages should indicate/correct for image transformations

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82995

          Priority: medium
            Bug ID: 82995
          Assignee: poppler-bugs at lists.freedesktop.org
           Summary: pdfimages should indicate/correct for image
                    transformations
          Severity: enhancement
    Classification: Unclassified
                OS: Linux (All)
          Reporter: scruss at scruss.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: utils
           Product: poppler

Created attachment 105176
  --> https://bugs.freedesktop.org/attachment.cgi?id=105176&action=edit
2 page PDF scan; displays properly, but extract images and the second page is
flipped

(This enhancement might be really hard to do, as I realize that objects stored
in a PDF data stream can have arbitrary transformations applied to them.)

My duplex scanner scans odd pages top-to-bottom, and even pages bottom-to-top.
When it generates PDF output, though, it corrects for this by inserting a
'/Rotate 180' on every second page. When pdfimages extracts the bitmaps, it
doesn't take this rotation into account, and so every other extracted page is
flipped the wrong way up.

Is there any way that this problem can be corrected in the output, and/or shown
in the -list output, please? I've attached a small example.

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