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Add table regions support

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Vinayak Mehta
2019-01-04 19:17:54 +05:30
parent a5027e81c5
commit 03f301b25c
8 changed files with 100 additions and 47 deletions
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docs/user/advanced.rst
+7 -7
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@@ -434,11 +434,11 @@ You can pass ``row_tol=<+int>`` to group the rows closer together, as shown belo
Detect short lines
------------------
There might be cases while using :ref:`Lattice <lattice>` when smaller lines don't get detected. The size of the smallest line that gets detected is calculated by dividing the PDF page's dimensions with a scaling factor called ``line_size_scaling``. By default, its value is 15.
There might be cases while using :ref:`Lattice <lattice>` when smaller lines don't get detected. The size of the smallest line that gets detected is calculated by dividing the PDF page's dimensions with a scaling factor called ``line_scale``. By default, its value is 15.
As you can guess, the larger the ``line_size_scaling``, the smaller the size of lines getting detected.
As you can guess, the larger the ``line_scale``, the smaller the size of lines getting detected.
.. warning:: Making ``line_size_scaling`` very large (>150) will lead to text getting detected as lines.
.. warning:: Making ``line_scale`` very large (>150) will lead to text getting detected as lines.
Here's a `PDF <../_static/pdf/short_lines.pdf>`__ where small lines separating the the headers don't get detected with the default value of 15.
@@ -458,11 +458,11 @@ Let's plot the table for this PDF.
:alt: A plot of the PDF table with short lines
:align: left
Clearly, the smaller lines separating the headers, couldn't be detected. Let's try with ``line_size_scaling=40``, and plot the table again.
Clearly, the smaller lines separating the headers, couldn't be detected. Let's try with ``line_scale=40``, and plot the table again.
::
>>> tables = camelot.read_pdf('short_lines.pdf', line_size_scaling=40)
>>> tables = camelot.read_pdf('short_lines.pdf', line_scale=40)
>>> camelot.plot(tables[0], kind='grid')
>>> plt.show()
@@ -511,7 +511,7 @@ We'll use the `PDF <../_static/pdf/short_lines.pdf>`__ from the previous example
::
>>> tables = camelot.read_pdf('short_lines.pdf', line_size_scaling=40, shift_text=[''])
>>> tables = camelot.read_pdf('short_lines.pdf', line_scale=40, shift_text=[''])
>>> tables[0].df
.. csv-table::
@@ -532,7 +532,7 @@ No surprises there — it did remain in place (observe the strings "2400" and "A
::
>>> tables = camelot.read_pdf('short_lines.pdf', line_size_scaling=40, shift_text=['r', 'b'])
>>> tables = camelot.read_pdf('short_lines.pdf', line_scale=40, shift_text=['r', 'b'])
>>> tables[0].df
.. tip::