Different image format/data from Page.get_text("dict") and Fitz.get_page_images()

[chatumao]

Please provide all mandatory information!

Describe the bug (mandatory)

I am trying to match (inline) images found via Page.get_text("dict") with the ones obtained by Fitz.get_page_images(), in order to assign the image name to the object obtained by the first method. I am having a PDF document that seems to have one single PNG image in it, I checked with a PDF editor and also from what I can read from the PDF source code there is only one image (not inline, but an object). Creating a PIL image from the data from the first method gives me a JPEG image type, from the other method it yields a PNG type. The underlying binary data is also different.

To Reproduce (mandatory)

#! /usr/bin/env python3

from PIL import Image
import io


def run():
  import fitz
  from io import BytesIO
  idata = open("your_pdf_path_here", "rb").read()
  ibuffer = BytesIO(idata)
  my_fitz = fitz.open("pdf", ibuffer)
  idx = -1
  for page in my_fitz.pages():
    idx += 1
    img_list = page.get_text("dict")
    img_list_xref = my_fitz.get_page_images(idx, full = True)
    img_found = my_fitz.extract_image(img_list_xref[0][0])
    img_inline = img_list["blocks"][3]
    img_inline_pil = Image.open(io.BytesIO(img_inline["image"]))
    img_found_pil = Image.open(io.BytesIO(img_found["image"]))
    pass


if __name__ == "__main__":
  run()

Your configuration (mandatory)

• Manjaro 64bit
• Python3.10.7 64bit
• 1.21.1 from wheel

Additional context (optional)

I would like to share the file with you, but cannot do so publicly.

[JorjMcKie]

Please provide data to reporduce problems.
That is probably not a bug. There are a number of situations where MuPDF falls back to creating a PNG.

from the other method it yields a PNG type

Which other method?

[JorjMcKie]

Ah, I did not read it thoroughly enough: you can send the file to my e-mail, if that is ok.

[chatumao]

I sent the file to jorj dot x dot mckie at outlook dot de.
Thanks for looking into it.

[JorjMcKie]

Found the problem, which will be fixed in next version.

[JorjMcKie]

Fixed by commit cee1dda

[chatumao]

Thanks a lot! :)