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dinglehopper/qurator/dinglehopper/tests/test_integ_character_error_rate_ocr.py

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from __future__ import division, print_function
import os
import pytest
from lxml import etree as ET
from .. import character_error_rate, page_text, alto_text
data_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'data')
@pytest.mark.integration
def test_character_error_rate_between_page_files():
# In the fake OCR file, we changed 2 characters and replaced a fi ligature with fi.
gt = page_text(ET.parse(os.path.join(data_dir, 'test-gt.page2018.xml')))
ocr = page_text(ET.parse(os.path.join(data_dir, 'test-fake-ocr.page2018.xml')))
assert character_error_rate(gt, ocr) == 4/(470 + 1 + 311) # 2 TextRegions, 1 \n
@pytest.mark.integration
def test_character_error_rate_between_page_alto():
gt = page_text(ET.parse(os.path.join(data_dir, 'lorem-ipsum', 'lorem-ipsum-scan.gt.page.xml')))
ocr = alto_text(ET.parse(os.path.join(data_dir, 'lorem-ipsum', 'lorem-ipsum-scan.ocr.tesseract.alto.xml')))
assert gt == ocr
assert character_error_rate(gt, ocr) == 0
@pytest.mark.integration
def test_character_error_rate_between_page_alto_2():
gt = page_text(ET.parse(os.path.join(data_dir, 'lorem-ipsum', 'lorem-ipsum-scan-bad.gt.page.xml')))
ocr = alto_text(ET.parse(os.path.join(data_dir, 'lorem-ipsum', 'lorem-ipsum-scan-bad.ocr.tesseract.alto.xml')))
assert character_error_rate(gt, ocr) == 8/591 # Manually verified