Image background returns black

[Pablituuu]

The background of a PDF is white and when I extract the images, it returns black.

I have created an environment where you can see the error, in the following link:
Around: https://codesandbox.io/p/devbox/issue-pdf-2p9q6s

The pdf that indicates this error is the following:
PDF: Big_Foot.pdf

I tried to remove the mask that I saw according to other previously opened cases, but this one only returns a mask and I cannot make it transparent.

This is the original pdf.

And this is the one that returns to me.

[JorjMcKie]

You did not tell us the code you tried. This code works and is also documented!

import fitz
doc=fitz.open("Big_Foot.pdf")
page=doc[0]
page.get_images()
[(12, 43, 2406, 2089, 8, 'DeviceRGB', '', 'X4', 'FlateDecode')]
basepix = fitz.Pixmap(doc,12)
maskpix = fitz.Pixmap(doc,43)
pix = fitz.Pixmap(basepix, maskpix)
pix.save("bigfoot.png")

[Pablituuu]

Thanks friend, the code is in the following codesandbox URL, but the solution worked for me, thanks again

https://codesandbox.io/p/devbox/issue-pdf-2p9q6s