[Bug] A specific diagram recognized as significant is not extracted as images by pymupdf4llm.to_markdown

[xcpky]

The following diagram is not extracted by pymupdf4llm.to_markdown("uart.pdf", write_images=True) as images, which it should.

This is the original pdf file, and the diagram is on page 5.

uart.pdf

I suspected the diagram is not marked as significant, and asked in discord. HaraldLieder says in discord it is but there are other bugs.

[JorjMcKie]

For some reason, the rectangles are not recognized as vectors. Need to investigate more here.
The package deliberately ignores all drawings without border line and the same fill color as the page background - in this case white. Therefore the (invisible) white rectangle wrapping your graphic is discarded.
You can circumvent this by the following little trick:

import pymupdf,pymupdf4llm
doc=pymupdf.open("uart.pdf")
md = ""
myheaders = pymupdf4llm.IdentifyHeaders(doc)  # do this once only
for page in doc:
    for bbox in page.cluster_drawings():
        page.draw_rect(bbox)  # draw a border around each cluster
    md += pymupdf4llm.to_markdown(doc, pages=[page.number], write_images=True,hdr_info=myheaders)

This should produce the image for the drawing.

[jamie-lemon]

If you don't want the default black border when you draw the rect then do:
page.draw_rect(bbox, stroke_opacity=0) # draw an invisible border around each cluster

[JorjMcKie]

Found the problem. Will be fixed in next release.

[JorjMcKie]

Fixed in version 0.0.27.