How to extract font names and sizes from PDF’s¶
Before you start, make sure you have installed pdfminer.six.
The following code sample shows how to extract font names and sizes for each of the characters. This uses the [simple1.pdf](https://raw.githubusercontent.com/pdfminer/pdfminer.six/master/samples/simple1.pdf).
from pathlib import Path
from typing import Iterable, Any
from pdfminer.high_level import extract_pages
def show_ltitem_hierarchy(o: Any, depth=0):
"""Show location and text of LTItem and all its descendants"""
if depth == 0:
print('element font stroking color text')
print('------------------------------ --------------------- -------------- ----------')
print(
f'{get_indented_name(o, depth):<30.30s} '
f'{get_optional_fontinfo(o):<20.20s} '
f'{get_optional_color(o):<17.17s}'
f'{get_optional_text(o)}'
)
if isinstance(o, Iterable):
for i in o:
show_ltitem_hierarchy(i, depth=depth + 1)
def get_indented_name(o: Any, depth: int) -> str:
"""Indented name of class"""
return ' ' * depth + o.__class__.__name__
def get_optional_fontinfo(o: Any) -> str:
"""Font info of LTChar if available, otherwise empty string"""
if hasattr(o, 'fontname') and hasattr(o, 'size'):
return f'{o.fontname} {round(o.size)}pt'
return ''
def get_optional_color(o: Any) -> str:
"""Font info of LTChar if available, otherwise empty string"""
if hasattr(o, 'graphicstate'):
return f'{o.graphicstate.scolor}'
return ''
def get_optional_text(o: Any) -> str:
"""Text of LTItem if available, otherwise empty string"""
if hasattr(o, 'get_text'):
return o.get_text().strip()
return ''
path = Path('samples/simple1.pdf').expanduser()
pages = extract_pages(path)
show_ltitem_hierarchy(pages)
The output looks like below. Note that it shows the hierarchical structure of the layout elements. The layout algorithm groups characters into lines and lines into boxes. And boxes appear on a page. The pages, boxes and lines do not have font information because this can change for each character. The stroking color is always None in this example, but it will contain the color if the PDF does specify colors.
element font stroking color text
------------------------------ --------------------- -------------- ----------
generator
LTPage
LTTextBoxHorizontal Hello
LTTextLineHorizontal Hello
LTChar Helvetica 24pt None H
LTChar Helvetica 24pt None e
LTChar Helvetica 24pt None l
LTChar Helvetica 24pt None l
LTChar Helvetica 24pt None o
LTChar Helvetica 24pt None
LTAnno
LTTextBoxHorizontal World
LTTextLineHorizontal World
LTChar Helvetica 24pt None W
LTChar Helvetica 24pt None o
LTChar Helvetica 24pt None r
LTChar Helvetica 24pt None l
LTChar Helvetica 24pt None d
LTAnno
LTTextBoxHorizontal Hello
LTTextLineHorizontal Hello
LTChar Helvetica 24pt None H
LTChar Helvetica 24pt None e
LTChar Helvetica 24pt None l
LTChar Helvetica 24pt None l
LTChar Helvetica 24pt None o
LTChar Helvetica 24pt None
LTAnno
LTTextBoxHorizontal World
LTTextLineHorizontal World
LTChar Helvetica 24pt None W
LTChar Helvetica 24pt None o
LTChar Helvetica 24pt None r
LTChar Helvetica 24pt None l
LTChar Helvetica 24pt None d
LTAnno
LTTextBoxHorizontal H e l l o
LTTextLineHorizontal H e l l o
LTChar Helvetica 24pt None H
LTAnno
LTChar Helvetica 24pt None e
LTAnno
LTChar Helvetica 24pt None l
LTAnno
LTChar Helvetica 24pt None l
LTAnno
LTChar Helvetica 24pt None o
LTAnno
LTChar Helvetica 24pt None
LTAnno
LTTextBoxHorizontal W o r l d
LTTextLineHorizontal W o r l d
LTChar Helvetica 24pt None W
LTAnno
LTChar Helvetica 24pt None o
LTAnno
LTChar Helvetica 24pt None r
LTAnno
LTChar Helvetica 24pt None l
LTAnno
LTChar Helvetica 24pt None d
LTAnno
LTTextBoxHorizontal H e l l o
LTTextLineHorizontal H e l l o
LTChar Helvetica 24pt None H
LTAnno
LTChar Helvetica 24pt None e
LTAnno
LTChar Helvetica 24pt None l
LTAnno
LTChar Helvetica 24pt None l
LTAnno
LTChar Helvetica 24pt None o
LTAnno
LTChar Helvetica 24pt None
LTAnno
LTTextBoxHorizontal W o r l d
LTTextLineHorizontal W o r l d
LTChar Helvetica 24pt None W
LTAnno
LTChar Helvetica 24pt None o
LTAnno
LTChar Helvetica 24pt None r
LTAnno
LTChar Helvetica 24pt None l
LTAnno
LTChar Helvetica 24pt None d
LTAnno