import os import shutil import subprocess import urllib.request from lxml import etree from glob import glob import pytest from ocrd.resolver import Resolver from ocrd_calamari import CalamariRecognize from .base import assets METS_KANT = assets.url_of('kant_aufklaerung_1784-page-region-line-word_glyph/data/mets.xml') WORKSPACE_DIR = '/tmp/test-ocrd-calamari' CHECKPOINT = os.path.join(os.getcwd(), 'gt4histocr-calamari/*.ckpt.json') # Because XML namespace versions are so much fun, we not only use one, we use TWO! NSMAP = { "pc": "http://schema.primaresearch.org/PAGE/gts/pagecontent/2019-07-15" } NSMAP_GT = { "pc": "http://schema.primaresearch.org/PAGE/gts/pagecontent/2013-07-15" } @pytest.fixture def workspace(): if os.path.exists(WORKSPACE_DIR): shutil.rmtree(WORKSPACE_DIR) os.makedirs(WORKSPACE_DIR) resolver = Resolver() workspace = resolver.workspace_from_url(METS_KANT, dst_dir=WORKSPACE_DIR) # XXX Work around data bug(?): # PAGE-XML links to OCR-D-IMG/INPUT_0017.tif, but this is nothing core can download os.makedirs(os.path.join(WORKSPACE_DIR, 'OCR-D-IMG')) for f in ['INPUT_0017.tif', 'INPUT_0020.tif']: urllib.request.urlretrieve( "https://github.com/OCR-D/assets/raw/master/data/kant_aufklaerung_1784/data/OCR-D-IMG/" + f, os.path.join(WORKSPACE_DIR, 'OCR-D-IMG', f)) # The binarization options I have are: # # a. ocrd_kraken which tries to install cltsm, whose installation is borken on my machine (protobuf) # b. ocrd_olena which 1. I cannot fully install via pip and 2. whose dependency olena doesn't compile on my # machine # c. just fumble with the original files # # So I'm going for option c. for f in ['INPUT_0017.tif', 'INPUT_0020.tif']: ff = os.path.join(WORKSPACE_DIR, 'OCR-D-IMG', f) subprocess.call(['convert', ff, '-threshold', '50%', ff]) # Remove GT Words and TextEquivs, to not accidently check GT text instead of the OCR text for of in workspace.mets.find_files(fileGrp="OCR-D-GT-SEG-LINE"): workspace.download_file(of) for to_remove in ["//pc:Word", "//pc:TextEquiv"]: for ff in glob(os.path.join(WORKSPACE_DIR, "OCR-D-GT-SEG-LINE", "*")): tree = etree.parse(ff) for e in tree.xpath(to_remove, namespaces=NSMAP_GT): e.getparent().remove(e) tree.write(ff, xml_declaration=True, encoding="utf-8") return workspace def test_recognize(workspace): CalamariRecognize( workspace, input_file_grp="OCR-D-GT-SEG-LINE", output_file_grp="OCR-D-OCR-CALAMARI", parameter={ "checkpoint": CHECKPOINT, } ).process() workspace.save_mets() page1 = os.path.join(workspace.directory, "OCR-D-OCR-CALAMARI/OCR-D-OCR-CALAMARI_0001.xml") assert os.path.exists(page1) with open(page1, "r", encoding="utf-8") as f: assert "verſchuldeten" in f.read() def test_word_segmentation(workspace): CalamariRecognize( workspace, input_file_grp="OCR-D-GT-SEG-LINE", output_file_grp="OCR-D-OCR-CALAMARI", parameter={ "checkpoint": CHECKPOINT, "textequiv_level": "word", # Note that we're going down to word level here } ).process() workspace.save_mets() page1 = os.path.join(workspace.directory, "OCR-D-OCR-CALAMARI/OCR-D-OCR-CALAMARI_0001.xml") assert os.path.exists(page1) tree = etree.parse(page1) # The result should contain a TextLine that contains the text "December" line = tree.xpath(".//pc:TextLine[pc:TextEquiv/pc:Unicode[contains(text(),'December')]]", namespaces=NSMAP)[0] assert line # The textline should a. contain multiple words and b. these should concatenate fine to produce the same line text words = line.xpath(".//pc:Word", namespaces=NSMAP) assert len(words) >= 2 words_text = " ".join(word.xpath("pc:TextEquiv/pc:Unicode", namespaces=NSMAP)[0].text for word in words) line_text = line.xpath("pc:TextEquiv/pc:Unicode", namespaces=NSMAP)[0].text assert words_text == line_text # For extra measure, check that we're not seeing any glyphs, as we asked for textequiv_level == "word" glyphs = tree.xpath("//pc:Glyph", namespaces=NSMAP) assert len(glyphs) == 0 def test_glyphs(workspace): CalamariRecognize( workspace, input_file_grp="OCR-D-GT-SEG-LINE", output_file_grp="OCR-D-OCR-CALAMARI", parameter={ "checkpoint": CHECKPOINT, "textequiv_level": "glyph", # Note that we're going down to glyph level here } ).process() workspace.save_mets() page1 = os.path.join(workspace.directory, "OCR-D-OCR-CALAMARI/OCR-D-OCR-CALAMARI_0001.xml") assert os.path.exists(page1) tree = etree.parse(page1) # The result should contain a lot of glyphs glyphs = tree.xpath("//pc:Glyph", namespaces=NSMAP) assert len(glyphs) >= 100 # vim:tw=120: