Invisible text in get_text() despite being absent in get_pixmap()

[yinghao-xue]

I've encountered a case where page.get_text("rawdict")returns text that is not visible in the rendered output.
Observation:
The text appears in the rawdictstructure with valid bbox, font, and size.
However, this text is not rendered​ in page.get_pixmap().
I tyied XChange (another PDF tool) also cannot see this text​ either visually or in its element list.
This indicates that the text itself might be valid, but it resides within an invisible container​ (e.g., Marked Content with Artifact semantics).
Key Finding:
PyMuPDF's get_pixmap()output is consistent with XChange, which proves that PyMuPDF internally knows this content should not be rendered.
Question:
Is there a way to access this "visibility" information via the public API? Looking at the rawdictdata below, all visible flags (flags, char_flags) appear identical. Maybe this text belongs to an invisible container? How to find it?

Rawdict Comparison:

--- VISIBLE SPAN (matches pixmap) ---

{'bbox': (133.10000610351562,
697.7949829101562,
219.6320037841797,
707.8300170898438),
'flags': 0,
'lines': [{'bbox': (133.10000610351562,
697.7949829101562,
219.6320037841797,
707.8300170898438),
'dir': (1.0, 0.0),
'spans': [{'alpha': 255,
'ascender': 0.9049999713897705,
'bbox': (133.10000610351562,
697.7949829101562,
219.6320037841797,
707.8300170898438),
'bidi': 0,
'char_flags': 16,
'chars': [{'bbox': (133.10000610351562,
697.7949829101562,
135.6020050048828,
707.8300170898438),
'c': ' ',
'origin': (133.10000610351562,
705.9400024414062),
'synthetic': False},
{'bbox': (135.62001037597656,
697.7949829101562,
138.12200927734375,
707.8300170898438),
'c': ' ',
'origin': (135.62001037597656,
705.9400024414062),
'synthetic': False},
{'bbox': (138.13999938964844,
697.7949829101562,
145.14199829101562,
707.8300170898438),
'c': 'O',
'origin': (138.13999938964844,
705.9400024414062),
'synthetic': False},
{'bbox': (145.0970001220703,
697.7949829101562,
147.5989990234375,
707.8300170898438),
'c': 't',
'origin': (145.0970001220703,
705.9400024414062),
'synthetic': False},
{'bbox': (147.5989990234375,
697.7949829101562,
152.60299682617188,
707.8300170898438),
'c': 'h',
'origin': (147.5989990234375,
705.9400024414062),
'synthetic': False},
{'bbox': (152.6479949951172,
697.7949829101562,
157.65199279785156,
707.8300170898438),
'c': 'e',
'origin': (152.6479949951172,
705.9400024414062),
'synthetic': False},
{'bbox': (157.67898559570312,
697.7949829101562,
160.6759796142578,
707.8300170898438),
'c': 'r',
'origin': (157.67898559570312,
705.9400024414062),
'synthetic': False},
{'bbox': (160.6759796142578,
697.7949829101562,
163.177978515625,
707.8300170898438),
'c': ' ',
'origin': (160.6759796142578,
705.9400024414062),
'synthetic': False},
{'bbox': (163.177978515625,
697.7949829101562,
166.1749725341797,
707.8300170898438),
'c': '(',
'origin': (163.177978515625,
705.9400024414062),
'synthetic': False},
{'bbox': (166.1749725341797,
697.7949829101562,
170.6749725341797,
707.8300170898438),
'c': 's',
'origin': (166.1749725341797,
705.9400024414062),
'synthetic': False},
{'bbox': (170.63897705078125,
697.7949829101562,
175.64297485351562,
707.8300170898438),
'c': 'p',
'origin': (170.63897705078125,
705.9400024414062),
'synthetic': False},
{'bbox': (175.6699676513672,
697.7949829101562,
180.67396545410156,
707.8300170898438),
'c': 'e',
'origin': (175.6699676513672,
705.9400024414062),
'synthetic': False},
{'bbox': (180.70095825195312,
697.7949829101562,
185.20095825195312,
707.8300170898438),
'c': 'c',
'origin': (180.70095825195312,
705.9400024414062),
'synthetic': False},
{'bbox': (185.13795471191406,
697.7949829101562,
187.13595581054688,
707.8300170898438),
'c': 'i',
'origin': (185.13795471191406,
705.9400024414062),
'synthetic': False},
{'bbox': (187.1719512939453,
697.7949829101562,
189.6739501953125,
707.8300170898438),
'c': 'f',
'origin': (187.1719512939453,
705.9400024414062),
'synthetic': False},
{'bbox': (189.6739501953125,
697.7949829101562,
194.1739501953125,
707.8300170898438),
'c': 'y',
'origin': (189.6739501953125,
705.9400024414062),
'synthetic': False},
{'bbox': (194.1289520263672,
697.7949829101562,
197.12594604492188,
707.8300170898438),
'c': ')',
'origin': (194.1289520263672,
705.9400024414062),
'synthetic': False},
{'bbox': (197.12594604492188,
697.7949829101562,
199.62794494628906,
707.8300170898438),
'c': '.',
'origin': (197.12594604492188,
705.9400024414062),
'synthetic': False},
{'bbox': (199.62794494628906,
697.7949829101562,
202.12994384765625,
707.8300170898438),
'c': ':',
'origin': (199.62794494628906,
705.9400024414062),
'synthetic': False},
{'bbox': (202.25,
697.7949829101562,
204.7519989013672,
707.8300170898438),
'c': ' ',
'origin': (202.25, 705.9400024414062),
'synthetic': False},
{'bbox': (204.77000427246094,
697.7949829101562,
209.7740020751953,
707.8300170898438),
'c': 'n',
'origin': (204.77000427246094,
705.9400024414062),
'synthetic': False},
{'bbox': (209.80099487304688,
697.7949829101562,
212.30299377441406,
707.8300170898438),
'c': '/',
'origin': (209.80099487304688,
705.9400024414062),
'synthetic': False},
{'bbox': (212.20399475097656,
697.7949829101562,
217.20799255371094,
707.8300170898438),
'c': 'a',
'origin': (212.20399475097656,
705.9400024414062),
'synthetic': False},
{'bbox': (217.1300048828125,
697.7949829101562,
219.6320037841797,
707.8300170898438),
'c': ' ',
'origin': (217.1300048828125,
705.9400024414062),
'synthetic': False}],
'color': 0,
'descender': -0.20999999344348907,
'flags': 0,
'font': 'ArialMT',
'origin': (133.10000610351562, 705.9400024414062),
'size': 9.0}],
'wmode': 0}],
'number': 93,
'type': 0}

--- INVISIBLE SPAN (exists in rawdict, absent in pixmap) ---

{'bbox': (219.6320037841797, 696.166015625, 305.29010009765625, 708.2080078125),
'flags': 0,
'lines': [{'bbox': (219.6320037841797,
696.166015625,
305.29010009765625,
708.2080078125),
'dir': (1.0, 0.0),
'spans': [{'alpha': 255,
'ascender': 0.9049999713897705,
'bbox': (219.6320037841797,
696.166015625,
305.29010009765625,
708.2080078125),
'bidi': 0,
'char_flags': 16,
'chars': [{'bbox': (219.6320037841797,
696.166015625,
225.34254455566406,
708.2080078125),
'c': 'C',
'origin': (219.6320037841797,
705.9400024414062),
'synthetic': False},
{'bbox': (225.34254455566406,
696.166015625,
231.05308532714844,
708.2080078125),
'c': 'E',
'origin': (225.34254455566406,
705.9400024414062),
'synthetic': False},
{'bbox': (231.05308532714844,
696.166015625,
236.7636260986328,
708.2080078125),
'c': 'R',
'origin': (231.05308532714844,
705.9400024414062),
'synthetic': False},
{'bbox': (236.7636260986328,
696.166015625,
242.4741668701172,
708.2080078125),
'c': 'T',
'origin': (236.7636260986328,
705.9400024414062),
'synthetic': False},
{'bbox': (242.4741668701172,
696.166015625,
248.18470764160156,
708.2080078125),
'c': 'I',
'origin': (242.4741668701172,
705.9400024414062),
'synthetic': False},
{'bbox': (248.18470764160156,
696.166015625,
253.89524841308594,
708.2080078125),
'c': 'F',
'origin': (248.18470764160156,
705.9400024414062),
'synthetic': False},
{'bbox': (253.89524841308594,
696.166015625,
259.60577392578125,
708.2080078125),
'c': 'I',
'origin': (253.89524841308594,
705.9400024414062),
'synthetic': False},
{'bbox': (259.60577392578125,
696.166015625,
265.3163146972656,
708.2080078125),
'c': 'C',
'origin': (259.60577392578125,
705.9400024414062),
'synthetic': False},
{'bbox': (265.3163146972656,
696.166015625,
271.02685546875,
708.2080078125),
'c': 'A',
'origin': (265.3163146972656,
705.9400024414062),
'synthetic': False},
{'bbox': (271.02685546875,
696.166015625,
276.7373962402344,
708.2080078125),
'c': 'T',
'origin': (271.02685546875,
705.9400024414062),
'synthetic': False},
{'bbox': (276.7373962402344,
696.166015625,
282.44793701171875,
708.2080078125),
'c': 'E',
'origin': (276.7373962402344,
705.9400024414062),
'synthetic': False},
{'bbox': (282.44793701171875,
696.166015625,
288.1584777832031,
708.2080078125),
'c': ' ',
'origin': (282.44793701171875,
705.9400024414062),
'synthetic': False},
{'bbox': (288.1584777832031,
696.166015625,
293.8690185546875,
708.2080078125),
'c': 'O',
'origin': (288.1584777832031,
705.9400024414062),
'synthetic': False},
{'bbox': (293.8690185546875,
696.166015625,
299.5795593261719,
708.2080078125),
'c': 'F',
'origin': (293.8690185546875,
705.9400024414062),
'synthetic': False},
{'bbox': (299.5795593261719,
696.166015625,
305.29010009765625,
708.2080078125),
'c': ' ',
'origin': (299.5795593261719,
705.9400024414062),
'synthetic': False}],
'color': 0,
'descender': -0.20999999344348907,
'flags': 0,
'font': 'ArialMT',
'origin': (219.6320037841797, 705.9400024414062),
'size': 30.415546417236328}],
'wmode': 0}],
'number': 95,
'type': 0}

EXT.031.pdf

[JorjMcKie]

This is another case of differences between "ActualText" being accepted (the default) or not.
The PDF's author found it cool to put some text (the drawn text in the gray left column like "STERILIZATION") as hidden "actual text" inside the PDF.
Because we (like all state-of-the-art extractors) by default accept ActualText it will appear ... together with whatever coordinates we are being given.
ActualText need not be visible in PDF viewers (likewise neither in Pixmaps), but it is extracted!
If you add the bit pymupdf.TEXT_IGNORE_ACTUALTEXT to your extraction flags, then these things will disappear.

[JorjMcKie]

In PyMuPDF4LLM, we always ignore ActualText because we aim to be as layout-faithful as possible.

[yinghao-xue]

ok,it works,thank you