Dark tables not detected.

[Semnodime]

Describe the bug

• Not all tables are detected.
• While three bright tables have been detected, two similar but dark tables haven't.

Steps to reproduce the bug

1. Install via pipenv install excalibur-py
2. Run camelot lattice -plot contour 19_extracted_A7325-AMICCOM.pdf

Expected behavior

• Detection of all five tables.

PDF

• 19_extracted_A7325-AMICCOM.pdf
• original / full pdf

Screenshots

Environment

• OS: Linux Mint 20
• Python version: 3.8
• Numpy version: ?
• OpenCV version: ?
• Ghostscript version: 9.50
• Camelot version: 0.8.2

Additional context My personal guess is that the dark grey tone of the table interferes with it's detection.

[vinayak-mehta]

Can you try with this setting: https://camelot-py.readthedocs.io/en/master/user/advanced.html#detect-short-lines?

[lahdjirayhan]

@vinayak-mehta @Semnodime

I have tried this problem myself and can confirm that the above documentation makes all five tables detected:

camelot lattice -scale 40 -plot contour 19_extracted_A7325-AMICCOM.pdf